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Dev tools · October 10, 2017

Ethereum token trading front-run, in 150 lines of Python

<strong>This post is a deep-dive into programmatically trading on the Ethereum / Bancor exchange and exploiting a game-theoretic security flaw in </strong><a href="https://www.bancor.network/" target="_blank"><strong>Bancor</strong></a><strong>, a high-profile smart contract on the Ethereum blockcha

Ethereum token trading front-run, in 150 lines of Python launched on October 10, 2017 with 7 votes, #1,215 of 3,169 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 9 years on.

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<strong>This post is a deep-dive into programmatically trading on the Ethereum / Bancor exchange and exploiting a game-theoretic security flaw in </strong><a href="https://www.bancor.network/" target="_blank"><strong>Bancor</strong></a><strong>, a high-profile smart contract on the Ethereum blockchain. The full code can be found at </strong><a href="https://github.com/bogatyy/bancor" target="_blan

This post is a deep-dive into programmatically trading on the Ethereum / Bancor exchange and exploiting a game-theoretic security flaw in Bancor , a high-profile smart contract on the Ethereum blockchain. The full code can be found at https://github.com/bogatyy/bancor . We collaborated with the Bancor team to make sure the current exploit is protected against, although for a little while there would still be a chance to make some beer money for educational purposes. Imagine trying to hack Bank of America — except you can read all of their code in advance, all of their transactions are public, and if you steal the money it’s irreversible. Sounds like a paranoid worst-case scenario? Well,…from hackernoon.com

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