Category Archives: Blog

Protected: Gaze Coin – Virtual Worlds With A Decentralised Value Economy On The Ethereum Blockchain – Part 1

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SnipCoin Crowdsale Token Contract Audit

SnipCoin Crowdsale Token Contract Audit

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Gimli Crowdsale Token Contract Audit

Gimli Crowdsale Token Contract Audit

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ChronoLogic Time Minting Token Contract Audit

ChronoLogic Time Minting Token Contract Audit

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Cindicator Crowdsale Token Contract Audit

Cindicator Crowdsale Token Contract Audit

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LookRev Crowdsale Token Contract Audit

LookRev Crowdsale Token Contract Audit

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Ethereum Foos – A Curated List Of Costly Ethereum Mistakes To Learn From – WIP

Ethereum Foos – A Curated List Of Costly Ethereum Mistakes To Learn From – Work in progress.

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A Quick Look At Parity’s Token Registry Smart Contract

Created Mar 14 2017, last updated Mar 31 2018. Address: 0x5F0281910Af44bFb5fC7e86A404d0304B0e042F1

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A Quick Look At Parity’s Signature Registry Contract

Created Mar 14 2017, last updated Aug 1 2017. Address: 0x44691B39d1a75dC4E0A0346CBB15E310e6ED1E86

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20 ETH (And More) Bug Bounty On The ConsenSys Multisig

Update Sep 22 2017 – Remove WhitelistedMultisig from this bug bounty as it is not being used There was a vulnerability that allowed hackers to steal USD 30 million from the Parity multisig wallets last week. I work with clients … Continue reading

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Aigang Network Presale Contract Audit

Aigang Network Presale Contract Audit

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Parity Multisig Recovery Reconciliation

Parity Multisig Recovery Reconciliation

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InvestFeed Crowdsale Audit

InvestFeed Crowdsale Audit

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Santiment’s Crowdsale Contract Audit

Santiment’s Crowdsale Contract Audit

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openANX Decentralised Exchange Token Sale Smart Contract

openANX Decentralised Exchange Token Sale Smart Contract

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Status Network Token Audit

Status Network Token Audit

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Dao.Casino Crowdsale Contract

Dao.Casino Crowdsale Contract

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FunFair Crowdsale Contract Audit

FunFair Crowdsale Contract Audit

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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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