Category Archives: Blog

Another USD 35 Million BAT-s**t ICO 99.9995827118343% Over In Less Than 1 Minute

The first transaction 0x64438300… was submitted in block 3798640 at May-31-2017 02:24:35 PM +UTC. From batICOData.tsv, 99.9995827118343% of the 156250 ETH was contributed in the first 3 blocks to 3798642 at Wed, 31 May 2017 14:25:29 UTC. The last non-zero … Continue reading

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Sikoba Announces the Launch of Presale ahead of its ICO

Sikoba Announces the Launch of Presale ahead of its ICO. I’m working with Sikoba.

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Tokencard ICO Bug Nets SNGLS Investors Up To 1,100% Extra

Tokencard ICO Bug Nets SNGLS Investors Up To 1,100% Extra. I am currently reconciling the numbers – see https://github.com/bokkypoobah/TokenCardICOAnalysis

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Encrypto Telecom Launches ICO To Bring Blockchain Technology To Global Telecommunications

Encrypto Telecom Launches ICO To Bring Blockchain Technology To Global Telecommunications The crowdsale is being partly powered by a smart contract built by yours truly – see https://github.com/bokkypoobah/CustomerDepositFactory.

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AUD 1 Million Traded On CryptoDerivatives.Market Today

From CoinMktCap:

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TokenCard ICO Raises USD 16.7 Million In 30 Minutes 13 Seconds

(work-in-progress) Note: Do not transfer your TKN tokens yet. There are some errors in the allocation of tokens and TokenCard may be deploying a new TKN token contract. See TKN Creation Event Updates and Found a major TokenCard ICO token … Continue reading

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Gnosis Auction Ends In 10 Minutes 48 Seconds, Top 3 Contributions Comprising 50% Of Funds Raised Executed By BiddingRing Contracts

The Gnosis auction was filled in super quick time. 250,000 ETH (USD 12.5 million @ USD 50 / ETH) was contributed to the GnosisAuction smart contract from 623 unique accounts within 10 minutes and 48 seconds. As the dutch auction … Continue reading

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Development, Testing And Security Audit Of The CustomerDepositFactory Smart Contract

See Customer Deposit Factory and Security Audit Of The CustomerDepositFactory Smart Contract.

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BetterAuction Smart Contract – Testing, Security Audit, And Assisting With The Development

See BetterAuction and Security Audit Of The BetterAuction Smart Contract.

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Less Than A Day Left For The DAO To ETC Refund Withdrawals. Update – Extended To Jan 10 2018.

(Originally written Apr 14 2017. Updated Apr 15 2017 with the news that the WhitehatWithdraw contract expiry has been extended to Jan 10 2018). News – Deadline Looms on Ethereum Classic DAO Withdrawals and The DAO Ethereum Classic Refund Effort … Continue reading

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Assessing The ERC20 Token Exchange Withdrawal Bug / Exploit

Reddit post Worry-some bug / exploit with ERC20 token transactions from exchanges and the Golem post How to Find $10M Just by Reading the Blockchain. This problem seems to be about how the exchanges implement their withdrawal functions and seems … Continue reading

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The Sikoba Presale Smart Contract Security Audit

(Created Mar 08 2017. Updated with test results Mar 14 2017. Updated with multisig wallet contribution test results Mar 23 2017.) I was asked to review the Sikoba presale smart contracts before the upcoming Sikoba presale crowdfunding event. This page … Continue reading

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Using The Ledger Nano S With MyEtherWallet, Go Ethereum and Parity, Without Chrome

Originally written Mar 10 2017 with title “Can I Use The Ledger Nano S Without Chrome?”. Updated Mar 11 2017, renamed to “Using The Ledger Nano S With MyEtherWallet And Go Ethereum, Without Chrome”). Updated Mar 12 2017 with Parity … Continue reading

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A Quick Look At Parity’s Signature Registry Contract

Address: 0x44691B39d1a75dC4E0A0346CBB15E310e6ED1E86

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A Quick Look At Parity’s Token Registry Smart Contract

Address: 0x5F0281910Af44bFb5fC7e86A404d0304B0e042F1

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Ethereum Decentralised Exchanges

(Work in progress) There are now a few decentralised exchanges on the Ethereum blockchains, and this is a quick look at the technology behind these exchanges: CryptoDerivatives.Market EtherDelta EtherEx EtherOpt MakerMarket, being rebranded to OasisDEX   CryptoDerivatives.Market Built by yours … Continue reading

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The Incent Coffee Token Smart Contract Security Audit

The Incent Coffee smart contract is currently being used to test out the Waves <-> Ethereum block swapper at https://blockswap.incentloyalty.com/. A version of the contract has been deployed to 0x2c875e5ea4706b1978a41b59edf2d3af31d60e70. This contract was written by Bok Consulting Pty Ltd in … Continue reading

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A Quick Look At Melonport’s ICO Contract

Melonport ICO is over after 13 minutes and 17 seconds as the funding goal of 227,000 ETH was reached. Note that MLN tokens are ERC20-compliant but cannot be transferred before endTime = 1489575600 or Mar 15 2017 @ 11:00am (UTC), … Continue reading

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Decentralized Capital’s Tokenised Fiat Currency. A Quick Look At The Smart Contracts

Here is Decentralized Capital’s website, their FAQ, and their Token Contracts page. Unfortunately you need to be verified to use this decentralised exchange. Here is their IDEX decentralised exchange screen: Here is their USD.DC verified smart contract deployed at 0x01a7018e6d1fde8a68d12f59b6532fb523b6259d: … Continue reading

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Decentralized Capital’s IDEX Is Live on the Mainnet! And A Quick Look At The Smart Contract Code

IDEX Is Live on the Mainnet!. Following is the verified source code from 0x63091244180ae240c87d1f528f5f269134cb07b3:

 

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BokkyPooBah Wuz Here! In Block #3,000,000! Yaaay!

I got my timing right and had the following validated contract mined in block #3,000,000 in the transaction https://etherscan.io/tx/0x7c03009d52ec50069adb4311d5225fe2249ce5afb3a9951af258f0f680efb19a at the address

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Ether.Camp’s Hacker Gold HKG Source Code, Concerns About The USD 50 million Cap, A Significant Bug And A New Bug Fixed Contract!

Originally posted Oct 18 2016; updated 14:05 Oct 22 2016 UTC with live contract details; updated Jan 7 2017 with significant bug; updated Jan 12 2017 with newly deployed contract with the bug fix. This is not investment advise as … Continue reading

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Gnosis Prediction Market Platform Crowdfunding Contract Security Audited Source Code

Originally posted Dec 13 2016, updated Dec 16 2016 with bug bounty details. This is not advise as to whether the Gnosis prediction market platform is a good investment or not. This is just a quick look at the source … Continue reading

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A Quick Look At EtherDelta’s Smart Contract

Here is EtherDelta’s screen running in the Ethereum Wallet application, executed to operate as Mist by using the command line parameter –mode mist, and then navigating to the URL https://etherdelta.github.io/#GNTW-ETH. EtherDelta is produced by https://etherboost.github.io/. Following is the source code … Continue reading

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The Original Augur REP TokenTraderFactory Contract (Work In Progress. Note that there is a bug in this contract)

NOTE Dec 14 2016: I’ve found a bug in the original REP TokenTraderFactory that could potentially lead to a loss in $$$. I’m working with the original author to fix this. Do not use this contract anymore. A new contract … Continue reading

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Ethereum Devcon2 Conference In Shanghai – Unofficial Single-Page Agenda With Slides, Videos And Links

Page created Sep 22 2016. Last updated Dec 13 2016 (72 videos added in total). This page will be updated with the links to the videos when they are made available. In the meantime, check out the puzzle in 100 … Continue reading

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SFMW – The Ethereum Blockchain, Smart Contracts, Tokens And A Decentralised Trustless Exchange Contract Market

Status: Work-in-progress Abstract The first ever trusted platform for the transfer of tokens was first established by the Bitcoin network in on Jan-03-2009 18:15:05 UTC. On Jul-30-2015 15:26:13 +UTC, the first block #0 of the Ethereum blockchain was mined. This … Continue reading

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100 Tricky Stick Puzzles Disrupt The Ethereum Devcon2 Conference In Shanghai

Published Sep 25 2016, updated with more photos from @tayvano Oct 18 2016. Updated with link to Lefteris’ tweet Nov 28 2016. I made 100 Tricky Stick puzzles for the Ethereum Devcon2 conference in Shanghai. The first indication of disruption … Continue reading

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The Golem Network Token Wrapped (GNTW) Contract

The Golem Network Token (GNT) is not a fully ERC20-compliant token. The ERC20 standard requires the following methods and events to be implemented for full compliance:

Check out the Golem Network Token source code at Golem Crowdfunding Funded To … Continue reading

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Trustless Golem Network Token (GNT) Selling Contract

Some individuals missed out on purchasing the Golem Network Token (GNT) in the Golem Crowdfunding Funded To 820,000 ETH Cap, as the sale was over within ~ half an hour. The tokens were sold a 1 ether (ETH) = 1,000 … Continue reading

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