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 Download - Bitcoin

Download - Bitcoin

Bitcoin

The true bitcoin community Top Stories with the Inside take.
[link]

MiningPoolHub

This sub is strictly focused on mining on the MiningPoolHub service.
[link]

Multi Mining

This subreddit is dedicated to profit based coin mining pools.
[link]

I’m almost completely new to bitcoin and mining. But what is the best bitcoin mining software for pc for beginners?

I have a older pc just laying around and want to put it to use, what is the easiest software for beginners?
submitted by stupidboyy to Bitcoin [link] [comments]

I have two "ASICMINER Block Erupter 333MH/s ASIC USB BTC Bitcoin Miner SHA256" can somebody help me on what software do i need that will use these usb asics and mine bitcoin or any other crypto coin. (i don't care if is it profitable orn not)

submitted by djkalantzhs24 to Bitcoin [link] [comments]

Another Bitcoin mining software that we just tested is called the Cudo Miner. While still in beta, it’s really easy to setup and configure, and all you need is a PC and an email address. What’s most beautiful about this app is that it comes for Windows, Linux and Mac, and we all know how hard ⬇️⬇️

Another Bitcoin mining software that we just tested is called the Cudo Miner. While still in beta, it’s really easy to setup and configure, and all you need is a PC and an email address. What’s most beautiful about this app is that it comes for Windows, Linux and Mac, and we all know how hard ⬇️⬇️ submitted by crypto5800 to u/crypto5800 [link] [comments]

What is the best and most trustworthy mining software? /r/Bitcoin

What is the best and most trustworthy mining software? /Bitcoin submitted by ABitcoinAllBot to BitcoinAll [link] [comments]

What is Bitfxt Vault? Bitfxt vault is an innovative software that reward bxtcoin miners with new bxtcoin depending on the vault algorithm purchased by miners. Watch out this video https://t.co/npr3VuPJKJ #bxtcoin #bitcoin #bitfxt #trading #mining #academy #wallet #vault

submitted by Barbero26 to u/Barbero26 [link] [comments]

What software runs a mining bitcoin node today? Is a mining node only mining, or is it also distributing transactions and blocks?

Roger and Gavin recently sparked discussions about that "non mining full nodes" are worthless. I don't share that view, because non-mining nodes serve in my opinion also valuable services: they help to distribute, validate and in some cases also to archive the block chain. They help to distribute transactions to the miners. They also play some part to protect the privacy of the spenders, because thanks to the nodes the spenders are not forced to contact the miners directly.
But what really puzzles me is, what a "mining full node" would be looking like today. I thought full nodes don't mine any longer, because the mining is handled by dedicated miners, which do nothing but mining. So I wonder if a more accurate description of the real life setup for the Bitcoin environment is, that there are practically only two types of nodes available today:
I'd be grateful to learn it's different, can somebody help out?
submitted by myoptician to btc [link] [comments]

What software runs a mining bitcoin node today? Is a mining node only mining, or is it also distributing transactions and blocks? /r/btc

What software runs a mining bitcoin node today? Is a mining node only mining, or is it also distributing transactions and blocks? /btc submitted by BitcoinAllBot to BitcoinAll [link] [comments]

What is the easiest to use yet still very official and safe bitcoin mining software that would be good for a newbie to try?

Hi all. I'm fairly new to this whole thing. I've known about bitcoin for a while now but never decided to get involved because, as dumb as it might seem to you 1337s out there, I'm not sure I fully understand how to mine safely.
I know that mining isn't worth much, especially since I only have my one computer that I built a year ago and a GTS 450 is probably obsolete even to a mining pool, but I wanted to get started and check it out and if I could get a full grasp on everything it might be worth dedicating some rigs to a mining pool or something.
First though, I want to mine without a pool, even though it may never even create a bitcoin. What should I use to do this? Do I need to know how to code or anything like that or is there a user-friendly interface available to quickly turn my computer into a miner? Also, can I do this on a computer in the background while still having it function fine doing other things?
I have a quad core 3.6 ghz athlon processor, gts 450 graphics, 16 gigs of ram (not that it matters). Any help would be appreciated. I know I can google these things but I've been doing research and I just don't really know what to trust getting into. I know there are a lot of scams out there and malware and such. Just want to be sure I'm doing it all right the first time.
submitted by mrpiratetoyou to Bitcoin [link] [comments]

The underrated stock survey! Submit your picks for the community to track

Following on the previous tracking post (http://redd.it/i2mmzg) and the highly upvoted request from DJ-Ascii , I've set up this post for another round of underrated or undervalued stock picks.
As before, let us know what stock you believe is underrated and a consistent winner that has done well for you, or you believe will do well going forward.
In order to make this easier to track please use the following guidelines for submitting.
  1. Only one submission per comment. You can make multiple comments, but please only submit one stock per comment.
  2. Please include at least the ticker and the company name. Feel free to explain why you think this is a good stock.
I'll add these new picks alongside the old survey so as to update you on each portfolio over time. Don't worry about any overlaps.
Edit 1: I've compiled everyone who has posted so far, but I'll look out for any final additions tomorrow. The list will then be locked EOD on Friday the 7th of August, and all prices will start from there.
Edit 2: All picks have now been locked down and consolidated into the list below. Stocks are sorted in alphabetical order of their company name and the ID corresponds to the approximate order in which they were submitted. The next update will be in 30 days.
ID Company Symbol Provided by Upvotes 8/7/2020
194 10X Genomics Inc TXG Unlucky-Prize 1 $96.13
111 1ST TR EXCHANGE/NASDAQ CEA CYBERSEC CIBR komoggmu321 1 $35.40
176 2U Inc TWOU DickDaddy 1 $41.49
110 AAR Corp. AIR paulo92834 4 $18.77
180 ACM Research Inc ACMR moveitover 1 $101.92
23 Activision Blizzard, Inc. ATVI Mondanivalo 12 $82.47
8 Advanced Micro Devices, Inc. AMD ArneGo, apqwer, LoveOfProfit 13 $84.85
28 Ageagle Aerial Systems Inc UAVS fishkillr 16 $3.26
205 Agraflora Organics International Inc AGRA spreeshark 1 $0.05
22 Air Canada TSE:AC priamXus 0 $15.73
19 Alexion Pharmaceuticals, Inc. ALXN fisk47 39 $103.28
70 Alibaba Group Holding Ltd - ADR BABA helio987, ScreeMart, Necessary_Club_6714 -1 $252.10
17 Ally Financial Inc ALLY jcurtis44 1 $21.47
24 Alteryx Inc AYX Kme2 30 $121.38
222 Altimmune Inc ALT Spes-Caritas 1 $27.38
117 Altria Group Inc MO ARGENT_UM_PUR, gm14202 1 $42.17
143 American Tower Corp AMT editviewgo 1 $257.61
175 American Water Works Company Inc AWK InfamousLegato 1 $149.79
183 Anglo Asian Mining LON:AAZ krenaldi1 1 $161.50
129 Aphria Inc APHA Aprhria, Bdghablig 1 $4.47
119 Apple Inc. AAPL tcldstnvdw -1 $444.45
184 Ares Capital Corporation ARCC ThemChecks 1 $14.87
54 ASML Holding NV ASML EthosPathosLegos, earthmoonsun 15 $366.07
113 Atlassian Corporation PLC TEAM shadowrckts 1 $170.93
224 Avalara Inc AVLR nomdeplume_alias 1 $122.71
244 Axon Enterprise Inc AAXN ansofteng 1 $83.88
150 Aytu Bioscience Inc AYTU Bkzkilla2, beefy-ambulance, subaruveganguy22 2 $1.38
236 Banco Bbva Argentina SA BBAR GAV17 1 $4.23
128 Bank of America Corp BAC oobydoobydoobydoo, wrs97 2 $26.11
247 BELLUS Health Inc BLU NhatNguyen2112 1 $2.74
29 Berkshire Hathaway Inc. Class B BRK.B Jeroen_Jrn, Cuza 31 $209.48
45 Best Buy Co Inc BBY 1madeamistake 2 $102.90
35 Beyond Meat Inc BYND Kreisensalat, Flipside 8 $131.51
33 BlackBerry Ltd BB mh1t, EthosPathosLegos 25 $4.84
208 Blackline Inc BL veebeew 2 $79.26
196 Booz Allen Hamilton Holding Corporation BAH i_smel_hookers 1 $84.67
75 Boston Beer Company Inc SAM Top_Island 2 $825.79
114 Brainstorm Cell Therapeutics Inc BCLI BigSexyTolo 2 $12.79
92 Brookfield Asset Management Inc BAM duongroi, Avaronah 2 $32.32
187 Brookfield Property Partners LP Unit BPY Onarco 1 $11.75
140 Brookfield Renewable Partners LP BEP YourPineapplePunch 1 $45.25
227 Cameco Corp CCJ jh4962772, Commandobolt, 3STmotivation 13 $10.37
109 Canadian Solar Inc. CSIQ MrMineHeads, vvv561 6 $25.32
204 Cardlytics Inc CDLX whossayn, YarManYak 2 $66.28
146 CBS Corporation Common Stock VIAC 1987supertramp 1 $26.21
74 CD PROJEKT S A/ADR OTGLY Thtb 8 $28.50
229 CDW common stock CDW plorfu 1 $114.77
95 CEL-SCI Corporation CVM Golden_Pineapple 1 $12.19
242 Chegg Inc CHGG Boots2243 1 $86.98
36 Cloudflare Inc NET thereisnospoongeek, olliemacg, Boots2243 220 $40.06
80 COLLIER CREEK H/SH CL A CCH RIC_FLAIR-WOOO 5 $13.84
246 Coty Inc COTY NhatNguyen2112 1 $4.00
209 Cresco Labs Inc CRLBF UncleSlippyFist 1 $6.28
3 Crispr Therapeutics AG CRSP emtvaikkajoku 98 $89.81
142 Crown Castle International Corp CCI jkgator 1 $168.19
16 CureVac Pending IPO Tangerinho 8 #N/A
223 CVS Health Corp CVS handsomeandsmart_ 2 $64.96
65 Cyberark Software Ltd CYBR Kevenam 2 $110.59
239 CytoDyn Inc CYDY dufmum 1 $4.79
165 Daqo New Energy Corp DQ stonk_daddy 1 $122.55
241 DexCom, Inc. DXCM InformalAid 1 $440.70
6 Dicerna Pharmaceuticals Inc DRNA earthmoonsun 7 $21.03
73 Digital Turbine Inc APPS toop4 6 $22.59
130 Docusign Inc DOCU h3ku, Teach-101 0 $204.76
185 Draftkings Inc DKNG boomshalock 1 $34.09
39 Drive Shack Inc DS Bobjenkins97 2 $1.65
4 Editas Medicine Inc EDIT earthmoonsun 7 $34.71
145 Edwards Lifesciences Corp EW TheTubbyOlive 1 $76.94
139 EHang Holdings Ltd - ADR EH TheEUR0PEAN 1 $9.21
230 Electrameccanica Vehicles Corp SOLO IHaveUsernameBlock 1 $3.07
118 Elevate Credit Inc ELVT ScoreFuture 1 $2.58
218 Else Nutrition Holdings Inc BABYF PringlesAreUs 1 $1.36
85 Empire State Realty Trust Inc ESRT silverpaw1786 4 $6.66
21 Enphase Energy Inc ENPH deGoblin 31 $72.84
197 Equinix Inc EQIX gce1010 3 $791.70
86 Essent Group Ltd ESNT veggie-man 1 $35.82
235 Etsy Inc ETSY PeskyShart 1 $135.06
84 Fastly Inc FSLY AwesomeMathUse 3 $79.33
93 Federal National Mortgage Association FNMA figbuilding, onkel_axel 2 $2.12
168 Fire & Flower Holdings Corp TSE:FAF tobcar 1 $1.01
207 First Mining Gold Corp FFMGF RecCenterBall 0 $0.41
219 FLIR Systems, Inc. FLIR zerokarma 1 $37.48
52 Fluor Corporation (NEW) FLR lost_searching 2 $11.38
90 FORUM MERGER II/SH CL A FMCI Mug_of_coffee 3 $14.53
81 Franco Nevada Corp FNV AwesomeMathUse 1 $153.57
155 FuelCell Energy Inc FCEL i-kno-nothing, dewaser 2 $2.68
98 Games Workshop Group PLC OTCMKTS:GMWKF MAUSECOP, Thenattylimit 2 $120.95
115 GameStop Corp. GME EmployerOfTheMonth 2 $4.16
200 Gan Ltd GAN emcdeezy22 2 $20.29
159 General Motors Company GM Buttershine_Beta -1 $26.72
251 Genius Brands International Inc GNUS due11 1 $1.59
156 GFL Environmental Inc GFL lenadunhamsbutthole 1 $21.56
99 Gilead Sciences, Inc. GILD Leroy--Brown 1 $69.35
138 GLB X FUNDS/HEALTH & WELLNESS T BFIT Venhuizer 2 $20.69
126 GLB X FUNDS/VIDEO GAMES & ESPORTS E HERO sgtyzi 1 $26.00
186 Golden Minerals Co AUMN YEEEEEAAAAA 1 $0.44
151 Gran Colombia Gold Corp TSE:GCM Linnake 0 $7.46
67 Grayscale Bitcoin Trust (Btc) GBTC asherlevi 2 $13.06
234 Great Panther Mining Ltd GPL Tony0x01 1 $0.93
152 H&R Real Estate Investment Trust HR.UN CaptainCanuck93 0 $10.34
122 Helen of Troy Limited HELE aa341 1 $201.26
55 Hikma Pharmaceuticals Plc HKMPF Marvins-Room 1 $31.08
20 Horizon Therapeutics PLC HZNP thesearchforanswer 3 $76.06
103 Huntington Ingalls Industries Inc HII howtoreadspaghetti 1 $167.90
9 IAC/Interactivecorp IAC dvdmovie1 36 $133.05
61 Ibio Inc IBIO PrairieDogger69 1 $3.80
101 Immunovia AB (publ) IMMNOV jennyther 3 $161.60
108 Ingles Markets, Incorporated IMKTA kimjungoon 1 $42.97
77 Inmode Ltd INMD meta-cognizant, craneman813 4 $31.77
123 Innovative Industrial Properties Inc IIPR Dalis_Ktm 1 $114.63
201 Inseego Corp INSG esoccer141414 1 $12.08
214 Inspire Medical Systems Inc INSP JPINFV2 1 $104.92
134 Intel Corporation INTC ionlypwn, TitanCrasher54, niknikniknikniknik1 5 $48.03
5 Intellia Therapeutics Inc NTLA earthmoonsun 7 $19.83
164 Intuitive Surgical, Inc. ISRG swalloforswallo 2 $685.85
252 INVESCO EXCHANG/SOLAR ETF TAN z74al 2 $51.20
71 InVitae Corp NVTA emtvaikkajoku, CrackHeadRodeo 6 $28.43
228 ISHARES TGLB CLEAN ENERGY ET ICLN drheman25Q 1 $15.88
112 John B. Sanfilippo & Son, Inc. JBSS chris011186 2 $89.24
171 JPMorgan Chase & Co. JPM wrs97 1 $99.38
58 Jumia Technologies AG - ADR JMIA Jerund, souptrades, 7YearOldCodPlayer, CharlieBrown364, fortnitehead 7 $19.26
144 Kaleyra Inc KLR souptrades 1 $5.87
158 KEFI Minerals plc LON:KEFI Scipio-Africannabis- 1 $1.88
216 Kirkland Lake Gold Ltd KL Newusername 1 $52.58
238 Kroger Co KR bxkrish 1 $35.24
2 Lemonade Inc LMND br1ghtness, skkreet, hahadumblloyd 4 $66.84
15 Limelight Networks, Inc. LLNW cyberdex, thug_funnie 3 $6.10
63 Livongo Health Inc LVGO staniel_diverson, Raybay192, Drifter 1996, moveitover 22 $120.88
182 Logitech International SA LOGI CharlieBrown364 1 $73.03
217 LONZA GRP AG/ADR LZAGY Fuck512 1 $62.92
66 Lydall, Inc. LDL Henisockle 1 $20.89
191 Macerich Co MAC skvettlappen 1 $7.85
97 Magnachip Semiconductor Corp MX samtony234 1 $12.08
233 Mamamancini's Holdings Inc MMMB Jayesslee 1 $1.70
88 Match Group Inc MTCH BallinLikeImKobe24 1 $115.88
79 Maverix Metals Inc MMX AwesomeMathUse 1 $4.61
107 Maxar Technologies Inc MAXR Borne2Run 1 $24.74
221 Mediwound Ltd MDWD blueblade408 1 $3.91
34 Mercadolibre Inc MELI pontoumporcento 14 $1,193.97
161 Micron Technology, Inc. MU Wexoch 3 $48.75
253 Microsoft Corporation MSFT TBSchemer 34 $212.48
179 Millicom International Cellular SA(SWE) STO:TIGO-SDB joseph460 1 $245.50
116 Mills Music Trust Unit OTCMKTS:MMTRS ARGENT_UM_PUR 1 $39.00
10 Molson Coors Beverage Co Class B TAP howtoreadspaghetti 1 $37.27
170 Morgan Stanley MS wrs97 1 $50.35
127 Naspers Limited NPSNY Demandredz 1 $34.60
11 Nathan's Famous, Inc. NATH howtoreadspaghetti 1 $51.25
181 NCR Corporation NCR IAMBEOWULFF, fistymonkey1337 4 $20.11
211 NESTLE S A/S ADR NSRGY suburban_robot 1 $118.47
124 New Relic Inc NEWR Dalis_Ktm 1 $53.62
249 New York Mortgage Trust Inc NYMT ToKeepAndToHoldForev 1 $2.77
162 New York Times Co NYT jonhuang 1 $45.61
69 Nio Inc - ADR NIO makesalotofmoney, Carrera_GT, Charlie Brown364 3 $13.42
59 Nokia Oyj NOK perfectriot, LiabilityFree 52 $4.98
37 Novacyt SA ALNOV Snoopmatt 1 $3.60
254 Nuance Communications Inc. NUAN IwantmyMTZ 1 $29.48
13 NVIDIA Corporation NVDA TBSchemer, friedtea15 66 $447.98
198 NVR, Inc. NVR Linnake 1 $3,875.01
154 Okta Inc OKTA Bcr731 3 $208.23
160 Opko Health Inc. OPK CS1026 1 $5.63
100 ORSTED A/S/ADR DNNGY BrentfordFC21 2 $47.37
190 Otonomy Inc OTIC Unlucky-Prize 1 $3.56
46 Oxford BioMedica plc OXB arabidopsis 12 $850.00
121 Pacific Ethanol Inc PEIX adamtejot 1 $2.69
220 Pagerduty Inc PD throthrowth 2 $29.85
25 Pan African Resources plc PAF Fruity_Pineapple 2 $26.30
245 Paradox Interactive AB (publ) OTCMKTS:PRXXF I_worship_odin 1 $24.30
174 Patriot One Technologies Inc PTOTF DanReynolds 1 $0.73
148 Peabody Energy Corporation BTU aviatoraway1 0 $2.52
237 Peloton Interactive Inc PTON loosetingles 1 $68.30
188 Penn National Gaming, Inc PENN Calpool 1 $49.00
87 Pershing Square Tontine Holdings, Ltd NYSE:PSTH-UN 5_yr_lurker 7 $21.08
31 Pharmacyte Biotech Inc PMCB DillieTheSquid 0 $0.01
47 Pinterest Inc PINS EthanPhan 10 $34.98
149 Planet 13 Holdings Inc PLNHF MMatter1 3 $2.67
43 Plug Power Inc PLUG lukwas_ 4 $11.28
147 Polaris Infrastructure Inc RAMPF CaptainCanuck93 1 $11.50
120 Prologis Inc PLD ImPinkSnail 5 $105.07
250 PROSHARES TULTRA MSCI JAPAN EZJ Necessary_Club_6714 1 $32.13
132 PROSHARES TULTRAPRO QQQ TQQQ iggy555, Guiterrezjm6 5 $126.99
48 Proto Labs Inc PRLB JEesSs 3 $130.13
166 Purple Innovation Inc PRPL jloy88, CharlieBrown364, RemiMartin 6 $23.95
44 Raytheon Technologies Corp RTX anon2019L 21 $61.23
210 Razer Inc RAZFF ThatOneRedditBro 1 $0.22
32 Realty Income Corp O bushysmalls 5 $62.72
199 Redfin Corp RDFN shreddit47 8 $43.69
206 RENAULT S A/ADR RNLSY jw8700 1 $5.33
178 Retractable Technologies, Inc. RVP EmreCanPuns 1 $10.18
94 Rigel Pharmaceuticals, Inc. RIGL Gay_Demons 1 $2.58
203 Rite Aid Corporation RAD ManagerMilkshake 1 $15.05
12 Rocky Mountain Chocolate Factory, Inc. RMCF howtoreadspaghetti 1 $3.20
163 Schrodinger Inc SDGR TipasaNuptials, asianmarysue, RattleGoreBitcoin 1 $71.17
72 Sea Ltd SE scatterblodded, tradeintel828384839, thug_funnie, Meymo 16 $129.00
215 ServiceNow Inc NOW cookingboy 1 $431.21
189 Shiloh Industries, Inc. SHLO brainbroked 1 $1.40
82 Shopify Inc SHOP AwesomeMathUse -1 $1,053.12
213 Sibanye Stillwater Ltd SBSW marqui4me 1 $11.39
231 Simulations Plus, Inc. SLP hellohi3 1 $65.83
173 SiTime Corp SITM drbh_ 1 $58.92
248 Six Flags Entertainment Corp SIX EthosPathosLegos 1 $18.38
202 Slack Technologies Inc WORK AntwanDixon_ 2 $28.95
51 SmileDirectClub Inc SDC meeni131 3 $9.05
49 Solaredge Technologies Inc SEDG m4r1vs 14 $211.47
27 Sony Corp SNE drorhac 13 $80.03
177 Sorrento Therapeutics Inc SRNE DowJonesLocker 1 $14.42
225 SPARTAN ENERGY /SH SPAQ bigsexy12 1 $12.36
40 Spirit Airlines Incorporated SAVE Matous_Palecek 0 $17.28
153 Spotify Technology SA SPOT _Hard4Jesus 0 $252.12
7 Square Inc SQ cuti95, ConstructivePlayer, Lfastrsx, jercky, CharlieBrown364 21 $147.22
1 StoneCo Ltd STNE GromGrommeta 73 $49.06
104 SunPower Corporation SPWR Hadouukken 1 $11.86
60 Sunrun Inc RUN FactualNeutronStar 2 $46.00
195 Switch Inc SWCH gce1010 1 $18.03
83 Taal Distributed Information Techs Inc TAAL AwesomeMathUse 1 $1.85
76 Taiwan Semiconductor Mfg. Co. Ltd. TSM Paks_12345, sogladatwork, BlissfulThinkr 13 $80.03
102 Tandem Diabetes Care Inc TNDM liao24 1 $104.15
169 Target Corporation TGT Kosher-Bacon 1 $131.75
26 Tesla Inc TSLA Skurinator, goldcakes, redmars1234, Drortmeyer2017 3 $1,452.71
137 TJX Companies Inc TJX princess-smartypants 3 $55.45
18 Toronto-Dominion Bank TD robbierox123 0 $45.77
141 TPI Composites Inc TPIC polwas 1 $28.81
53 Trade Desk Inc TTD all_hail_hypno, Kay312010 6 $493.20
106 TransMedics Group Inc TMDX DropoutEngy 1 $18.05
131 TransUnion TRU AndyCircus 0 $87.38
78 Travelcenters of America Inc TA jk_tilt 1 $17.27
226 Trevena Inc TRVN pacosteles 1 $2.38
243 Trulieve Cannabis Corp TCNNF grphelps1, Cucumber_Cooling 2 $18.83
38 Tupperware Brands Corporation TUP Scumbaggedfriends 1 $14.98
68 Turtle Beach Corp HEAR chancsc11 1 $18.37
62 Twilio Inc TWLO MarconianRex 8 $249.00
41 Uber Technologies Inc Uber DukeBD2021 -1 $32.90
96 Unibail-Rodamco-Westfield SE URW eams66 2 $42.44
125 Universal Display Corporation OLED niknikniknikniknik1 1 $186.51
64 Valero Energy Corporation VLO chickenandcheesefart 1 $52.66
133 Vanguard Total Stock Market Index Fund Admiral Shares VTSAX WackyBeachJustice 1 $82.67
135 Veeva Systems Inc VEEV JohnSpartans 3 $261.22
193 Ventas, Inc. VTR Unlucky-Prize 1 $41.52
57 VirnetX Holding Corporation VHC vyts18 2 $5.26
172 VMware, Inc. VMW kingbrow2020 1 $142.31
50 VolitionRX Ltd VNRX RiDDDiK1337 1 $3.35
91 Waitr Holdings Inc WTRH exstaticj 1 $5.15
14 Walker & Dunlop, Inc. WD TBSchemer 0 $57.70
167 Walmart Inc WMT anthonyjh21 6 $129.97
30 Walt Disney Co DIS jadenmc2189, biz_student 6 $129.93
192 WELL Health Technologies Corp TSE:WELL Unlucky-Prize, IcemanVish 2 $4.49
105 Wells Fargo & Co WFC yehdhbdjdjd 1 $25.07
240 Westinghouse Air Brake Technologies Corp WAB warman506 1 $67.23
42 Wizz Air Holdings PLC WIZZ Matous_Palecek 2 $3,412.00
157 Workhorse Group Inc WKHS VisionsDB 5 $16.52
89 Xebec Adsorption Inc. XBC Mug_of_coffee 3 $4.95
232 Xpel Inc XPEL Bkazzle 1 $20.06
212 Yeti Holdings Inc YETI boomwhackers 1 $50.40
136 Zagg Inc ZAGG ni_shi_shei 2 $3.98
56 Zoetis Inc ZTS BearBearChooey 19 $158.88
submitted by Kme2 to investing [link] [comments]

Bitcoin Newcomers FAQ - Please read!

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
It all started with the release of the release of Satoshi Nakamoto's whitepaper however that will probably go over the head of most readers so we recommend the following videos for a good starting point for understanding how bitcoin works and a little about its long term potential:
Some other great resources include Lopp.net, the Princeton crypto series and James D'Angelo's Bitcoin 101 Blackboard series.
Some excellent writing on Bitcoin's value proposition and future can be found at the Satoshi Nakamoto Institute.
Some Bitcoin statistics can be found here and here. Developer resources can be found here. Peer-reviewed research papers can be found here.
Potential upcoming protocol improvements and scaling resources here and here.
The number of times Bitcoin was declared dead by the media can be found here (LOL!)

Key properties of Bitcoin

Where can I buy bitcoins?

Bitcoin.org and BuyBitcoinWorldwide.com are helpful sites for beginners. You can buy or sell any amount of bitcoin (even just a few dollars worth) and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also check out the bitcoinity exchange resources for a larger list of options for purchases.
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy OTP Auth
Android Android N/A
iOS iOS iOS

Watch out for scams

As mentioned above, Bitcoin is decentralized, which by definition means there is no official website or Twitter handle or spokesperson or CEO. However, all money attracts thieves. This combination unfortunately results in scammers running official sounding names or pretending to be an authority on YouTube or social media. Many scammers throughout the years have claimed to be the inventor of Bitcoin. Websites like bitcoin(dot)com and the btc subreddit are active scams. Almost all altcoins (shitcoins) are marketed heavily with big promises but are really just designed to separate you from your bitcoin. So be careful: any resource, including all linked in this document, may in the future turn evil. Don't trust, verify. Also as they say in our community "Not your keys, not your coins".

Where can I spend bitcoins?

Check out spendabit or bitcoin directory for millions of merchant options. Also you can spend bitcoin anywhere visa is accepted with bitcoin debit cards such as the CashApp card. Some other useful site are listed below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Spendabit, Overstock and The Bitcoin Directory Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, LivingRoomofSatoshi, Coinsfer, and more Bill payment
Menufy, Takeaway and Thuisbezorgd NL Takeout delivered to your door
Expedia, Cheapair, Destinia, Abitsky, SkyTours, the Travel category on Gyft and 9flats For when you need to get away
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun Domain name registration
Stampnik Discounted USPS Priority, Express, First-Class mail postage
Coinmap and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. If you would prefer to keep it simple there are several good options. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, Cryptogrind, Coinality, Bitgigs, /Jobs4Bitcoins, BitforTip, Rein Project Freelancing
Lolli Earn bitcoin when you shop online!
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
/GirlsGoneBitcoin NSFW Adult services
A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins.

Bitcoin-Related Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network Second layer scaling
Blockstream, Rootstock and Drivechain Sidechains
Hivemind and Augur Prediction markets
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
JoinMarket and Wasabi Wallet CoinJoin implementation
Coinffeine and Bisq Decentralized bitcoin exchanges
Keybase Identity & Reputation management
Abra Global P2P money transmitter network
Bitcore Open source Bitcoin javascript library

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
bitcoin BTC 1 bitcoin one bitcoin is equal to 100 million satoshis
millibitcoin mBTC 1,000 per bitcoin used as default unit in recent Electrum wallet releases
bit bit 1,000,000 per bitcoin colloquial "slang" term for microbitcoin (μBTC)
satoshi sat 100,000,000 per bitcoin smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $10000 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit.
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BitcoinFan7 to Bitcoin [link] [comments]

Dragonchain Great Reddit Scaling Bake-Off Public Proposal

Dragonchain Great Reddit Scaling Bake-Off Public Proposal

Dragonchain Public Proposal TL;DR:

Dragonchain has demonstrated twice Reddit’s entire total daily volume (votes, comments, and posts per Reddit 2019 Year in Review) in a 24-hour demo on an operational network. Every single transaction on Dragonchain is decentralized immediately through 5 levels of Dragon Net, and then secured with combined proof on Bitcoin, Ethereum, Ethereum Classic, and Binance Chain, via Interchain. At the time, in January 2020, the entire cost of the demo was approximately $25K on a single system (transaction fees locked at $0.0001/txn). With current fees (lowest fee $0.0000025/txn), this would cost as little as $625.
Watch Joe walk through the entire proposal and answer questions on YouTube.
This proposal is also available on the Dragonchain blog.

Hello Reddit and Ethereum community!

I’m Joe Roets, Founder & CEO of Dragonchain. When the team and I first heard about The Great Reddit Scaling Bake-Off we were intrigued. We believe we have the solutions Reddit seeks for its community points system and we have them at scale.
For your consideration, we have submitted our proposal below. The team at Dragonchain and I welcome and look forward to your technical questions, philosophical feedback, and fair criticism, to build a scaling solution for Reddit that will empower its users. Because our architecture is unlike other blockchain platforms out there today, we expect to receive many questions while people try to grasp our project. I will answer all questions here in this thread on Reddit, and I've answered some questions in the stream on YouTube.
We have seen good discussions so far in the competition. We hope that Reddit’s scaling solution will emerge from The Great Reddit Scaling Bake-Off and that Reddit will have great success with the implementation.

Executive summary

Dragonchain is a robust open source hybrid blockchain platform that has proven to withstand the passing of time since our inception in 2014. We have continued to evolve to harness the scalability of private nodes, yet take full advantage of the security of public decentralized networks, like Ethereum. We have a live, operational, and fully functional Interchain network integrating Bitcoin, Ethereum, Ethereum Classic, and ~700 independent Dragonchain nodes. Every transaction is secured to Ethereum, Bitcoin, and Ethereum Classic. Transactions are immediately usable on chain, and the first decentralization is seen within 20 seconds on Dragon Net. Security increases further to public networks ETH, BTC, and ETC within 10 minutes to 2 hours. Smart contracts can be written in any executable language, offering full freedom to existing developers. We invite any developer to watch the demo, play with our SDK’s, review open source code, and to help us move forward. Dragonchain specializes in scalable loyalty & rewards solutions and has built a decentralized social network on chain, with very affordable transaction costs. This experience can be combined with the insights Reddit and the Ethereum community have gained in the past couple of months to roll out the solution at a rapid pace.

Response and PoC

In The Great Reddit Scaling Bake-Off post, Reddit has asked for a series of demonstrations, requirements, and other considerations. In this section, we will attempt to answer all of these requests.

Live Demo

A live proof of concept showing hundreds of thousands of transactions
On Jan 7, 2020, Dragonchain hosted a 24-hour live demonstration during which a quarter of a billion (250 million+) transactions executed fully on an operational network. Every single transaction on Dragonchain is decentralized immediately through 5 levels of Dragon Net, and then secured with combined proof on Bitcoin, Ethereum, Ethereum Classic, and Binance Chain, via Interchain. This means that every single transaction is secured by, and traceable to these networks. An attack on this system would require a simultaneous attack on all of the Interchained networks.
24 hours in 4 minutes (YouTube):
24 hours in 4 minutes
The demonstration was of a single business system, and any user is able to scale this further, by running multiple systems simultaneously. Our goals for the event were to demonstrate a consistent capacity greater than that of Visa over an extended time period.
Tooling to reproduce our demo is available here:
https://github.com/dragonchain/spirit-bomb

Source Code

Source code (for on & off-chain components as well tooling used for the PoC). The source code does not have to be shared publicly, but if Reddit decides to use a particular solution it will need to be shared with Reddit at some point.

Scaling

How it works & scales

Architectural Scaling

Dragonchain’s architecture attacks the scalability issue from multiple angles. Dragonchain is a hybrid blockchain platform, wherein every transaction is protected on a business node to the requirements of that business or purpose. A business node may be held completely private or may be exposed or replicated to any level of exposure desired.
Every node has its own blockchain and is independently scalable. Dragonchain established Context Based Verification as its consensus model. Every transaction is immediately usable on a trust basis, and in time is provable to an increasing level of decentralized consensus. A transaction will have a level of decentralization to independently owned and deployed Dragonchain nodes (~700 nodes) within seconds, and full decentralization to BTC and ETH within minutes or hours. Level 5 nodes (Interchain nodes) function to secure all transactions to public or otherwise external chains such as Bitcoin and Ethereum. These nodes scale the system by aggregating multiple blocks into a single Interchain transaction on a cadence. This timing is configurable based upon average fees for each respective chain. For detailed information about Dragonchain’s architecture, and Context Based Verification, please refer to the Dragonchain Architecture Document.

Economic Scaling

An interesting feature of Dragonchain’s network consensus is its economics and scarcity model. Since Dragon Net nodes (L2-L4) are independent staking nodes, deployment to cloud platforms would allow any of these nodes to scale to take on a large percentage of the verification work. This is great for scalability, but not good for the economy, because there is no scarcity, and pricing would develop a downward spiral and result in fewer verification nodes. For this reason, Dragonchain uses TIME as scarcity.
TIME is calculated as the number of Dragons held, multiplied by the number of days held. TIME influences the user’s access to features within the Dragonchain ecosystem. It takes into account both the Dragon balance and length of time each Dragon is held. TIME is staked by users against every verification node and dictates how much of the transaction fees are awarded to each participating node for every block.
TIME also dictates the transaction fee itself for the business node. TIME is staked against a business node to set a deterministic transaction fee level (see transaction fee table below in Cost section). This is very interesting in a discussion about scaling because it guarantees independence for business implementation. No matter how much traffic appears on the entire network, a business is guaranteed to not see an increased transaction fee rate.

Scaled Deployment

Dragonchain uses Docker and Kubernetes to allow the use of best practices traditional system scaling. Dragonchain offers managed nodes with an easy to use web based console interface. The user may also deploy a Dragonchain node within their own datacenter or favorite cloud platform. Users have deployed Dragonchain nodes on-prem on Amazon AWS, Google Cloud, MS Azure, and other hosting platforms around the world. Any executable code, anything you can write, can be written into a smart contract. This flexibility is what allows us to say that developers with no blockchain experience can use any code language to access the benefits of blockchain. Customers have used NodeJS, Python, Java, and even BASH shell script to write smart contracts on Dragonchain.
With Docker containers, we achieve better separation of concerns, faster deployment, higher reliability, and lower response times.
We chose Kubernetes for its self-healing features, ability to run multiple services on one server, and its large and thriving development community. It is resilient, scalable, and automated. OpenFaaS allows us to package smart contracts as Docker images for easy deployment.
Contract deployment time is now bounded only by the size of the Docker image being deployed but remains fast even for reasonably large images. We also take advantage of Docker’s flexibility and its ability to support any language that can run on x86 architecture. Any image, public or private, can be run as a smart contract using Dragonchain.

Flexibility in Scaling

Dragonchain’s architecture considers interoperability and integration as key features. From inception, we had a goal to increase adoption via integration with real business use cases and traditional systems.
We envision the ability for Reddit, in the future, to be able to integrate alternate content storage platforms or other financial services along with the token.
  • LBRY - To allow users to deploy content natively to LBRY
  • MakerDAO to allow users to lend small amounts backed by their Reddit community points.
  • STORJ/SIA to allow decentralized on chain storage of portions of content. These integrations or any other are relatively easy to integrate on Dragonchain with an Interchain implementation.

Cost

Cost estimates (on-chain and off-chain) For the purpose of this proposal, we assume that all transactions are on chain (posts, replies, and votes).
On the Dragonchain network, transaction costs are deterministic/predictable. By staking TIME on the business node (as described above) Reddit can reduce transaction costs to as low as $0.0000025 per transaction.
Dragonchain Fees Table

Getting Started

How to run it
Building on Dragonchain is simple and requires no blockchain experience. Spin up a business node (L1) in our managed environment (AWS), run it in your own cloud environment, or on-prem in your own datacenter. Clear documentation will walk you through the steps of spinning up your first Dragonchain Level 1 Business node.
Getting started is easy...
  1. Download Dragonchain’s dctl
  2. Input three commands into a terminal
  3. Build an image
  4. Run it
More information can be found in our Get started documents.

Architecture
Dragonchain is an open source hybrid platform. Through Dragon Net, each chain combines the power of a public blockchain (like Ethereum) with the privacy of a private blockchain.
Dragonchain organizes its network into five separate levels. A Level 1, or business node, is a totally private blockchain only accessible through the use of public/private keypairs. All business logic, including smart contracts, can be executed on this node directly and added to the chain.
After creating a block, the Level 1 business node broadcasts a version stripped of sensitive private data to Dragon Net. Three Level 2 Validating nodes validate the transaction based on guidelines determined from the business. A Level 3 Diversity node checks that the level 2 nodes are from a diverse array of locations. A Level 4 Notary node, hosted by a KYC partner, then signs the validation record received from the Level 3 node. The transaction hash is ledgered to the Level 5 public chain to take advantage of the hash power of massive public networks.
Dragon Net can be thought of as a “blockchain of blockchains”, where every level is a complete private blockchain. Because an L1 can send to multiple nodes on a single level, proof of existence is distributed among many places in the network. Eventually, proof of existence reaches level 5 and is published on a public network.

API Documentation

APIs (on chain & off)

SDK Source

Nobody’s Perfect

Known issues or tradeoffs
  • Dragonchain is open source and even though the platform is easy enough for developers to code in any language they are comfortable with, we do not have so large a developer community as Ethereum. We would like to see the Ethereum developer community (and any other communities) become familiar with our SDK’s, our solutions, and our platform, to unlock the full potential of our Ethereum Interchain. Long ago we decided to prioritize both Bitcoin and Ethereum Interchains. We envision an ecosystem that encompasses different projects to give developers the ability to take full advantage of all the opportunities blockchain offers to create decentralized solutions not only for Reddit but for all of our current platforms and systems. We believe that together we will take the adoption of blockchain further. We currently have additional Interchain with Ethereum Classic. We look forward to Interchain with other blockchains in the future. We invite all blockchains projects who believe in decentralization and security to Interchain with Dragonchain.
  • While we only have 700 nodes compared to 8,000 Ethereum and 10,000 Bitcoin nodes. We harness those 18,000 nodes to scale to extremely high levels of security. See Dragonchain metrics.
  • Some may consider the centralization of Dragonchain’s business nodes as an issue at first glance, however, the model is by design to protect business data. We do not consider this a drawback as these nodes can make any, none, or all data public. Depending upon the implementation, every subreddit could have control of its own business node, for potential business and enterprise offerings, bringing new alternative revenue streams to Reddit.

Costs and resources

Summary of cost & resource information for both on-chain & off-chain components used in the PoC, as well as cost & resource estimates for further scaling. If your PoC is not on mainnet, make note of any mainnet caveats (such as congestion issues).
Every transaction on the PoC system had a transaction fee of $0.0001 (one-hundredth of a cent USD). At 256MM transactions, the demo cost $25,600. With current operational fees, the same demonstration would cost $640 USD.
For the demonstration, to achieve throughput to mimic a worldwide payments network, we modeled several clients in AWS and 4-5 business nodes to handle the traffic. The business nodes were tuned to handle higher throughput by adjusting memory and machine footprint on AWS. This flexibility is valuable to implementing a system such as envisioned by Reddit. Given that Reddit’s daily traffic (posts, replies, and votes) is less than half that of our demo, we would expect that the entire Reddit system could be handled on 2-5 business nodes using right-sized containers on AWS or similar environments.
Verification was accomplished on the operational Dragon Net network with over 700 independently owned verification nodes running around the world at no cost to the business other than paid transaction fees.

Requirements

Scaling

This PoC should scale to the numbers below with minimal costs (both on & off-chain). There should also be a clear path to supporting hundreds of millions of users.
Over a 5 day period, your scaling PoC should be able to handle:
*100,000 point claims (minting & distributing points) *25,000 subscriptions *75,000 one-off points burning *100,000 transfers
During Dragonchain’s 24 hour demo, the above required numbers were reached within the first few minutes.
Reddit’s total activity is 9000% more than Ethereum’s total transaction level. Even if you do not include votes, it is still 700% more than Ethereum’s current volume. Dragonchain has demonstrated that it can handle 250 million transactions a day, and it’s architecture allows for multiple systems to work at that level simultaneously. In our PoC, we demonstrate double the full capacity of Reddit, and every transaction was proven all the way to Bitcoin and Ethereum.
Reddit Scaling on Ethereum

Decentralization

Solutions should not depend on any single third-party provider. We prefer solutions that do not depend on specific entities such as Reddit or another provider, and solutions with no single point of control or failure in off-chain components but recognize there are numerous trade-offs to consider
Dragonchain’s architecture calls for a hybrid approach. Private business nodes hold the sensitive data while the validation and verification of transactions for the business are decentralized within seconds and secured to public blockchains within 10 minutes to 2 hours. Nodes could potentially be controlled by owners of individual subreddits for more organic decentralization.
  • Billing is currently centralized - there is a path to federation and decentralization of a scaled billing solution.
  • Operational multi-cloud
  • Operational on-premises capabilities
  • Operational deployment to any datacenter
  • Over 700 independent Community Verification Nodes with proof of ownership
  • Operational Interchain (Interoperable to Bitcoin, Ethereum, and Ethereum Classic, open to more)

Usability Scaling solutions should have a simple end user experience.

Users shouldn't have to maintain any extra state/proofs, regularly monitor activity, keep track of extra keys, or sign anything other than their normal transactions
Dragonchain and its customers have demonstrated extraordinary usability as a feature in many applications, where users do not need to know that the system is backed by a live blockchain. Lyceum is one of these examples, where the progress of academy courses is being tracked, and successful completion of courses is rewarded with certificates on chain. Our @Save_The_Tweet bot is popular on Twitter. When used with one of the following hashtags - #please, #blockchain, #ThankYou, or #eternalize the tweet is saved through Eternal to multiple blockchains. A proof report is available for future reference. Other examples in use are DEN, our decentralized social media platform, and our console, where users can track their node rewards, view their TIME, and operate a business node.
Examples:

Transactions complete in a reasonable amount of time (seconds or minutes, not hours or days)
All transactions are immediately usable on chain by the system. A transaction begins the path to decentralization at the conclusion of a 5-second block when it gets distributed across 5 separate community run nodes. Full decentralization occurs within 10 minutes to 2 hours depending on which interchain (Bitcoin, Ethereum, or Ethereum Classic) the transaction hits first. Within approximately 2 hours, the combined hash power of all interchained blockchains secures the transaction.

Free to use for end users (no gas fees, or fixed/minimal fees that Reddit can pay on their behalf)
With transaction pricing as low as $0.0000025 per transaction, it may be considered reasonable for Reddit to cover transaction fees for users.
All of Reddit's Transactions on Blockchain (month)
Community points can be earned by users and distributed directly to their Reddit account in batch (as per Reddit minting plan), and allow users to withdraw rewards to their Ethereum wallet whenever they wish. Withdrawal fees can be paid by either user or Reddit. This model has been operating inside the Dragonchain system since 2018, and many security and financial compliance features can be optionally added. We feel that this capability greatly enhances user experience because it is seamless to a regular user without cryptocurrency experience, yet flexible to a tech savvy user. With regard to currency or token transactions, these would occur on the Reddit network, verified to BTC and ETH. These transactions would incur the $0.0000025 transaction fee. To estimate this fee we use the monthly active Reddit users statista with a 60% adoption rate and an estimated 10 transactions per month average resulting in an approximate $720 cost across the system. Reddit could feasibly incur all associated internal network charges (mining/minting, transfer, burn) as these are very low and controllable fees.
Reddit Internal Token Transaction Fees

Reddit Ethereum Token Transaction Fees
When we consider further the Ethereum fees that might be incurred, we have a few choices for a solution.
  1. Offload all Ethereum transaction fees (user withdrawals) to interested users as they wish to withdraw tokens for external use or sale.
  2. Cover Ethereum transaction fees by aggregating them on a timed schedule. Users would request withdrawal (from Reddit or individual subreddits), and they would be transacted on the Ethereum network every hour (or some other schedule).
  3. In a combination of the above, customers could cover aggregated fees.
  4. Integrate with alternate Ethereum roll up solutions or other proposals to aggregate minting and distribution transactions onto Ethereum.

Bonus Points

Users should be able to view their balances & transactions via a blockchain explorer-style interface
From interfaces for users who have no knowledge of blockchain technology to users who are well versed in blockchain terms such as those present in a typical block explorer, a system powered by Dragonchain has flexibility on how to provide balances and transaction data to users. Transactions can be made viewable in an Eternal Proof Report, which displays raw data along with TIME staking information and traceability all the way to Bitcoin, Ethereum, and every other Interchained network. The report shows fields such as transaction ID, timestamp, block ID, multiple verifications, and Interchain proof. See example here.
Node payouts within the Dragonchain console are listed in chronological order and can be further seen in either Dragons or USD. See example here.
In our social media platform, Dragon Den, users can see, in real-time, their NRG and MTR balances. See example here.
A new influencer app powered by Dragonchain, Raiinmaker, breaks down data into a user friendly interface that shows coin portfolio, redeemed rewards, and social scores per campaign. See example here.

Exiting is fast & simple
Withdrawing funds on Dragonchain’s console requires three clicks, however, withdrawal scenarios with more enhanced security features per Reddit’s discretion are obtainable.

Interoperability Compatibility with third party apps (wallets/contracts/etc) is necessary.
Proven interoperability at scale that surpasses the required specifications. Our entire platform consists of interoperable blockchains connected to each other and traditional systems. APIs are well documented. Third party permissions are possible with a simple smart contract without the end user being aware. No need to learn any specialized proprietary language. Any code base (not subsets) is usable within a Docker container. Interoperable with any blockchain or traditional APIs. We’ve witnessed relatively complex systems built by engineers with no blockchain or cryptocurrency experience. We’ve also demonstrated the creation of smart contracts within minutes built with BASH shell and Node.js. Please see our source code and API documentation.

Scaling solutions should be extensible and allow third parties to build on top of it Open source and extensible
APIs should be well documented and stable

Documentation should be clear and complete
For full documentation, explore our docs, SDK’s, Github repo’s, architecture documents, original Disney documentation, and other links or resources provided in this proposal.

Third-party permissionless integrations should be possible & straightforward Smart contracts are Docker based, can be written in any language, use full language (not subsets), and can therefore be integrated with any system including traditional system APIs. Simple is better. Learning an uncommon or proprietary language should not be necessary.
Advanced knowledge of mathematics, cryptography, or L2 scaling should not be required. Compatibility with common utilities & toolchains is expected.
Dragonchain business nodes and smart contracts leverage Docker to allow the use of literally any language or executable code. No proprietary language is necessary. We’ve witnessed relatively complex systems built by engineers with no blockchain or cryptocurrency experience. We’ve also demonstrated the creation of smart contracts within minutes built with BASH shell and Node.js.

Bonus

Bonus Points: Show us how it works. Do you have an idea for a cool new use case for Community Points? Build it!

TIME

Community points could be awarded to Reddit users based upon TIME too, whereas the longer someone is part of a subreddit, the more community points someone naturally gained, even if not actively commenting or sharing new posts. A daily login could be required for these community points to be credited. This grants awards to readers too and incentivizes readers to create an account on Reddit if they browse the website often. This concept could also be leveraged to provide some level of reputation based upon duration and consistency of contribution to a community subreddit.

Dragon Den

Dragonchain has already built a social media platform that harnesses community involvement. Dragon Den is a decentralized community built on the Dragonchain blockchain platform. Dragon Den is Dragonchain’s answer to fake news, trolling, and censorship. It incentivizes the creation and evaluation of quality content within communities. It could be described as being a shareholder of a subreddit or Reddit in its entirety. The more your subreddit is thriving, the more rewarding it will be. Den is currently in a public beta and in active development, though the real token economy is not live yet. There are different tokens for various purposes. Two tokens are Lair Ownership Rights (LOR) and Lair Ownership Tokens (LOT). LOT is a non-fungible token for ownership of a specific Lair. LOT will only be created and converted from LOR.
Energy (NRG) and Matter (MTR) work jointly. Your MTR determines how much NRG you receive in a 24-hour period. Providing quality content, or evaluating content will earn MTR.

Security. Users have full ownership & control of their points.
All community points awarded based upon any type of activity or gift, are secured and provable to all Interchain networks (currently BTC, ETH, ETC). Users are free to spend and withdraw their points as they please, depending on the features Reddit wants to bring into production.

Balances and transactions cannot be forged, manipulated, or blocked by Reddit or anyone else
Users can withdraw their balance to their ERC20 wallet, directly through Reddit. Reddit can cover the fees on their behalf, or the user covers this with a portion of their balance.

Users should own their points and be able to get on-chain ERC20 tokens without permission from anyone else
Through our console users can withdraw their ERC20 rewards. This can be achieved on Reddit too. Here is a walkthrough of our console, though this does not show the quick withdrawal functionality, a user can withdraw at any time. https://www.youtube.com/watch?v=aNlTMxnfVHw

Points should be recoverable to on-chain ERC20 tokens even if all third-parties involved go offline
If necessary, signed transactions from the Reddit system (e.g. Reddit + Subreddit) can be sent to the Ethereum smart contract for minting.

A public, third-party review attesting to the soundness of the design should be available
To our knowledge, at least two large corporations, including a top 3 accounting firm, have conducted positive reviews. These reviews have never been made public, as Dragonchain did not pay or contract for these studies to be released.

Bonus points
Public, third-party implementation review available or in progress
See above

Compatibility with HSMs & hardware wallets
For the purpose of this proposal, all tokenization would be on the Ethereum network using standard token contracts and as such, would be able to leverage all hardware wallet and Ethereum ecosystem services.

Other Considerations

Minting/distributing tokens is not performed by Reddit directly
This operation can be automated by smart contract on Ethereum. Subreddits can if desired have a role to play.

One off point burning, as well as recurring, non-interactive point burning (for subreddit memberships) should be possible and scalable
This is possible and scalable with interaction between Dragonchain Reddit system and Ethereum token contract(s).

Fully open-source solutions are strongly preferred
Dragonchain is fully open source (see section on Disney release after conclusion).

Conclusion

Whether it is today, or in the future, we would like to work together to bring secure flexibility to the highest standards. It is our hope to be considered by Ethereum, Reddit, and other integrative solutions so we may further discuss the possibilities of implementation. In our public demonstration, 256 million transactions were handled in our operational network on chain in 24 hours, for the low cost of $25K, which if run today would cost $625. Dragonchain’s interoperable foundation provides the atmosphere necessary to implement a frictionless community points system. Thank you for your consideration of our proposal. We look forward to working with the community to make something great!

Disney Releases Blockchain Platform as Open Source

The team at Disney created the Disney Private Blockchain Platform. The system was a hybrid interoperable blockchain platform for ledgering and smart contract development geared toward solving problems with blockchain adoption and usability. All objective evaluation would consider the team’s output a success. We released a list of use cases that we explored in some capacity at Disney, and our input on blockchain standardization as part of our participation in the W3C Blockchain Community Group.
https://lists.w3.org/Archives/Public/public-blockchain/2016May/0052.html

Open Source

In 2016, Roets proposed to release the platform as open source to spread the technology outside of Disney, as others within the W3C group were interested in the solutions that had been created inside of Disney.
Following a long process, step by step, the team met requirements for release. Among the requirements, the team had to:
  • Obtain VP support and approval for the release
  • Verify ownership of the software to be released
  • Verify that no proprietary content would be released
  • Convince the organization that there was a value to the open source community
  • Convince the organization that there was a value to Disney
  • Offer the plan for ongoing maintenance of the project outside of Disney
  • Itemize competing projects
  • Verify no conflict of interest
  • Preferred license
  • Change the project name to not use the name Disney, any Disney character, or any other associated IP - proposed Dragonchain - approved
  • Obtain legal approval
  • Approval from corporate, parks, and other business units
  • Approval from multiple Disney patent groups Copyright holder defined by Disney (Disney Connected and Advanced Technologies)
  • Trademark searches conducted for the selected name Dragonchain
  • Obtain IT security approval
  • Manual review of OSS components conducted
  • OWASP Dependency and Vulnerability Check Conducted
  • Obtain technical (software) approval
  • Offer management, process, and financial plans for the maintenance of the project.
  • Meet list of items to be addressed before release
  • Remove all Disney project references and scripts
  • Create a public distribution list for email communications
  • Remove Roets’ direct and internal contact information
  • Create public Slack channel and move from Disney slack channels
  • Create proper labels for issue tracking
  • Rename internal private Github repository
  • Add informative description to Github page
  • Expand README.md with more specific information
  • Add information beyond current “Blockchains are Magic”
  • Add getting started sections and info on cloning/forking the project
  • Add installation details
  • Add uninstall process
  • Add unit, functional, and integration test information
  • Detail how to contribute and get involved
  • Describe the git workflow that the project will use
  • Move to public, non-Disney git repository (Github or Bitbucket)
  • Obtain Disney Open Source Committee approval for release
On top of meeting the above criteria, as part of the process, the maintainer of the project had to receive the codebase on their own personal email and create accounts for maintenance (e.g. Github) with non-Disney accounts. Given the fact that the project spanned multiple business units, Roets was individually responsible for its ongoing maintenance. Because of this, he proposed in the open source application to create a non-profit organization to hold the IP and maintain the project. This was approved by Disney.
The Disney Open Source Committee approved the application known as OSSRELEASE-10, and the code was released on October 2, 2016. Disney decided to not issue a press release.
Original OSSRELASE-10 document

Dragonchain Foundation

The Dragonchain Foundation was created on January 17, 2017. https://den.social/l/Dragonchain/24130078352e485d96d2125082151cf0/dragonchain-and-disney/
submitted by j0j0r0 to ethereum [link] [comments]

Why Osana takes so long? (Programmer's point of view on current situation)

I decided to write a comment about «Why Osana takes so long?» somewhere and what can be done to shorten this time. It turned into a long essay. Here's TL;DR of it:
The cost of never paying down this technical debt is clear; eventually the cost to deliver functionality will become so slow that it is easy for a well-designed competitive software product to overtake the badly-designed software in terms of features. In my experience, badly designed software can also lead to a more stressed engineering workforce, in turn leading higher staff churn (which in turn affects costs and productivity when delivering features). Additionally, due to the complexity in a given codebase, the ability to accurately estimate work will also disappear.
Junade Ali, Mastering PHP Design Patterns (2016)
Longer version: I am not sure if people here wanted an explanation from a real developer who works with C and with relatively large projects, but I am going to do it nonetheless. I am not much interested in Yandere Simulator nor in this genre in general, but this particular development has a lot to learn from for any fellow programmers and software engineers to ensure that they'll never end up in Alex's situation, especially considering that he is definitely not the first one to got himself knee-deep in the development hell (do you remember Star Citizen?) and he is definitely not the last one.
On the one hand, people see that Alex works incredibly slowly, equivalent of, like, one hour per day, comparing it with, say, Papers, Please, the game that was developed in nine months from start to finish by one guy. On the other hand, Alex himself most likely thinks that he works until complete exhaustion each day. In fact, I highly suspect that both those sentences are correct! Because of the mistakes made during early development stages, which are highly unlikely to be fixed due to the pressure put on the developer right now and due to his overall approach to coding, cost to add any relatively large feature (e.g. Osana) can be pretty much comparable to the cost of creating a fan game from start to finish. Trust me, I've seen his leaked source code (don't tell anybody about that) and I know what I am talking about. The largest problem in Yandere Simulator right now is its super slow development. So, without further ado, let's talk about how «implementing the low hanging fruit» crippled the development and, more importantly, what would have been an ideal course of action from my point of view to get out. I'll try to explain things in the easiest terms possible.
  1. else if's and lack any sort of refactoring in general
The most «memey» one. I won't talk about the performance though (switch statement is not better in terms of performance, it is a myth. If compiler detects some code that can be turned into a jump table, for example, it will do it, no matter if it is a chain of if's or a switch statement. Compilers nowadays are way smarter than one might think). Just take a look here. I know that it's his older JavaScript code, but, believe it or not, this piece is still present in C# version relatively untouched.
I refactored this code for you using C language (mixed with C++ since there's no this pointer in pure C). Take a note that else if's are still there, else if's are not the problem by itself.
The refactored code is just objectively better for one simple reason: it is shorter, while not being obscure, and now it should be able to handle, say, Trespassing and Blood case without any input from the developer due to the usage of flags. Basically, the shorter your code, the more you can see on screen without spreading your attention too much. As a rule of thumb, the less lines there are, the easier it is for you to work with the code. Just don't overkill that, unless you are going to participate in International Obfuscated C Code Contest. Let me reiterate:
Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
Antoine de Saint-Exupéry
This is why refactoring — activity of rewriting your old code so it does the same thing, but does it quicker, in a more generic way, in less lines or simpler — is so powerful. In my experience, you can only keep one module/class/whatever in your brain if it does not exceed ~1000 lines, maybe ~1500. Splitting 17000-line-long class into smaller classes probably won't improve performance at all, but it will make working with parts of this class way easier.
Is it too late now to start refactoring? Of course NO: better late than never.
  1. Comments
If you think that you wrote this code, so you'll always easily remember it, I have some bad news for you: you won't. In my experience, one week and that's it. That's why comments are so crucial. It is not necessary to put a ton of comments everywhere, but just a general idea will help you out in the future. Even if you think that It Just Works™ and you'll never ever need to fix it. Time spent to write and debug one line of code almost always exceeds time to write one comment in large-scale projects. Moreover, the best code is the code that is self-evident. In the example above, what the hell does (float) 6 mean? Why not wrap it around into the constant with a good, self-descriptive name? Again, it won't affect performance, since C# compiler is smart enough to silently remove this constant from the real code and place its value into the method invocation directly. Such constants are here for you.
I rewrote my code above a little bit to illustrate this. With those comments, you don't have to remember your code at all, since its functionality is outlined in two tiny lines of comments above it. Moreover, even a person with zero knowledge in programming will figure out the purpose of this code. It took me less than half a minute to write those comments, but it'll probably save me quite a lot of time of figuring out «what was I thinking back then» one day.
Is it too late now to start adding comments? Again, of course NO. Don't be lazy and redirect all your typing from «debunk» page (which pretty much does the opposite of debunking, but who am I to judge you here?) into some useful comments.
  1. Unit testing
This is often neglected, but consider the following. You wrote some code, you ran your game, you saw a new bug. Was it introduced right now? Is it a problem in your older code which has shown up just because you have never actually used it until now? Where should you search for it? You have no idea, and you have one painful debugging session ahead. Just imagine how easier it would be if you've had some routines which automatically execute after each build and check that environment is still sane and nothing broke on a fundamental level. This is called unit testing, and yes, unit tests won't be able to catch all your bugs, but even getting 20% of bugs identified at the earlier stage is a huge boon to development speed.
Is it too late now to start adding unit tests? Kinda YES and NO at the same time. Unit testing works best if it covers the majority of project's code. On the other side, a journey of a thousand miles begins with a single step. If you decide to start refactoring your code, writing a unit test before refactoring will help you to prove to yourself that you have not broken anything without the need of running the game at all.
  1. Static code analysis
This is basically pretty self-explanatory. You set this thing once, you forget about it. Static code analyzer is another «free estate» to speed up the development process by finding tiny little errors, mostly silly typos (do you think that you are good enough in finding them? Well, good luck catching x << 4; in place of x <<= 4; buried deep in C code by eye!). Again, this is not a silver bullet, it is another tool which will help you out with debugging a little bit along with the debugger, unit tests and other things. You need every little bit of help here.
Is it too late now to hook up static code analyzer? Obviously NO.
  1. Code architecture
Say, you want to build Osana, but then you decided to implement some feature, e.g. Snap Mode. By doing this you have maybe made your game a little bit better, but what you have just essentially done is complicated your life, because now you should also write Osana code for Snap Mode. The way game architecture is done right now, easter eggs code is deeply interleaved with game logic, which leads to code «spaghettifying», which in turn slows down the addition of new features, because one has to consider how this feature would work alongside each and every old feature and easter egg. Even if it is just gazing over one line per easter egg, it adds up to the mess, slowly but surely.
A lot of people mention that developer should have been doing it in object-oritented way. However, there is no silver bullet in programming. It does not matter that much if you are doing it object-oriented way or usual procedural way; you can theoretically write, say, AI routines on functional (e.g. LISP)) or even logical language if you are brave enough (e.g. Prolog). You can even invent your own tiny programming language! The only thing that matters is code quality and avoiding the so-called shotgun surgery situation, which plagues Yandere Simulator from top to bottom right now. Is there a way of adding a new feature without interfering with your older code (e.g. by creating a child class which will encapsulate all the things you need, for example)? Go for it, this feature is basically «free» for you. Otherwise you'd better think twice before doing this, because you are going into the «technical debt» territory, borrowing your time from the future by saying «I'll maybe optimize it later» and «a thousand more lines probably won't slow me down in the future that much, right?». Technical debt will incur interest on its own that you'll have to pay. Basically, the entire situation around Osana right now is just a huge tale about how just «interest» incurred by technical debt can control the entire project, like the tail wiggling the dog.
I won't elaborate here further, since it'll take me an even larger post to fully describe what's wrong about Yandere Simulator's code architecture.
Is it too late to rebuild code architecture? Sadly, YES, although it should be possible to split Student class into descendants by using hooks for individual students. However, code architecture can be improved by a vast margin if you start removing easter eggs and features like Snap Mode that currently bloat Yandere Simulator. I know it is going to be painful, but it is the only way to improve code quality here and now. This will simplify the code, and this will make it easier for you to add the «real» features, like Osana or whatever you'd like to accomplish. If you'll ever want them back, you can track them down in Git history and re-implement them one by one, hopefully without performing the shotgun surgery this time.
  1. Loading times
Again, I won't be talking about the performance, since you can debug your game on 20 FPS as well as on 60 FPS, but this is a very different story. Yandere Simulator is huge. Once you fixed a bug, you want to test it, right? And your workflow right now probably looks like this:
  1. Fix the code (unavoidable time loss)
  2. Rebuild the project (can take a loooong time)
  3. Load your game (can take a loooong time)
  4. Test it (unavoidable time loss, unless another bug has popped up via unit testing, code analyzer etc.)
And you can fix it. For instance, I know that Yandere Simulator makes all the students' photos during loading. Why should that be done there? Why not either move it to project building stage by adding build hook so Unity does that for you during full project rebuild, or, even better, why not disable it completely or replace with «PLACEHOLDER» text for debug builds? Each second spent watching the loading screen will be rightfully interpreted as «son is not coding» by the community.
Is it too late to reduce loading times? Hell NO.
  1. Jenkins
Or any other continuous integration tool. «Rebuild a project» can take a long time too, and what can we do about that? Let me give you an idea. Buy a new PC. Get a 32-core Threadripper, 32 GB of fastest RAM you can afford and a cool motherboard which would support all of that (of course, Ryzen/i5/Celeron/i386/Raspberry Pi is fine too, but the faster, the better). The rest is not necessary, e.g. a barely functional second hand video card burned out by bitcoin mining is fine. You set up another PC in your room. You connect it to your network. You set up ramdisk to speed things up even more. You properly set up Jenkins) on this PC. From now on, Jenkins cares about the rest: tracking your Git repository, (re)building process, large and time-consuming unit tests, invoking static code analyzer, profiling, generating reports and whatever else you can and want to hook up. More importantly, you can fix another bug while Jenkins is rebuilding the project for the previous one et cetera.
In general, continuous integration is a great technology to quickly track down errors that were introduced in previous versions, attempting to avoid those kinds of bug hunting sessions. I am highly unsure if continuous integration is needed for 10000-20000 source lines long projects, but things can be different as soon as we step into the 100k+ territory, and Yandere Simulator by now has approximately 150k+ source lines of code. I think that probably continuous integration might be well worth it for Yandere Simulator.
Is it too late to add continuous integration? NO, albeit it is going to take some time and skills to set up.
  1. Stop caring about the criticism
Stop comparing Alex to Scott Cawton. IMO Alex is very similar to the person known as SgtMarkIV, the developer of Brutal Doom, who is also a notorious edgelord who, for example, also once told somebody to kill himself, just like… However, being a horrible person, SgtMarkIV does his job. He simply does not care much about public opinion. That's the difference.
  1. Go outside
Enough said. Your brain works slower if you only think about games and if you can't provide it with enough oxygen supply. I know that this one is probably the hardest to implement, but…
That's all, folks.
Bonus: Do you think how short this list would have been if someone just simply listened to Mike Zaimont instead of breaking down in tears?
submitted by Dezhitse to Osana [link] [comments]

Technical: Taproot: Why Activate?

This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given public key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

submitted by almkglor to Bitcoin [link] [comments]

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