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Home Ethereum

BTC Relay included in Ethereum Bounty Program

n70products by n70products
April 17, 2025
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Following hacking @ DEVCON1,  Martin Swende is Nr. 1 on the leaderboard of the Ethereum Bounty Program. The bounty program is ongoing and the last bounty awarded amounted to five BTC. This system is open to anybody. With BTC Relay preparing for launch on Ethereum and its significance for a lot of DApps, we need to spotlight its ongoing safety audit by together with it within the Ethereum Bounty Program.

BTC Relay is an Ethereum contract that implements Bitcoin SPV: https://en.bitcoin.it/wiki/Thin_Client_Security

The chief function of BTC Relay is to cross alongside any sufficiently confirmed Bitcoin transaction, to a specified Ethereum contract. If somebody makes a Bitcoin fee, or any arbitrary transaction on the canonical Bitcoin blockchain, the relay ought to be capable of ship it to any specified Ethereum contract. More details in the spec.

The aim is to establish safety points reminiscent of accepting invalid blockheaders, false proofs, or invalid Bitcoin transactions. Equally, if there’s a legitimate Bitcoin transaction which BTC Relay doesn’t totally relay, that may even be eligible for bounties.

Please be aware that since BTC Relay has a separate open-source grant for bounties, main bugs shall be rewarded as much as 1 BTC.  A lot increased rewards are potential (as much as 5 BTC) in case of very extreme vulnerabilities. Rewards are eligible for everybody besides bounty program judges and builders of BTC Relay.

The scope is on the contract, the 5 “.se” information within the root listing of:

https://github.com/ethereum/btcrelay/tree/1466934855225b1e4a87031d299c1209ba12d503

(It is a commit on https://github.com/ethereum/btcrelay develop department).

Not in scope is full SPV consumer performance (for instance Bitcoin block timestamps will not be checked to avoid wasting fuel prices). Higher mechanisms for incentivization, fuel price and different algorithm optimization will not be in scope. That stated, any such suggestions will nonetheless be gladly thought of.

With BTC Relay now included within the Ethereum bounty program, a lot of the guidelines on http://bounty.ethdev.com apply. For examples, web sites will not be a part of the bounty program and first come, first serve — points which have already been submitted by one other person or are already known to the crew will not be eligible for bounty rewards. However, this additionally signifies that past financial rewards, each bounty can be eligible for:

  • Itemizing on the the Ethereum bounty leaderboard with factors accumulating over the course of this system.
  • Private inscription within the Ethereum namereg as soon as it is reside.
  • An unique, restricted version Ethereum Bountyhunter t-shirt

If you happen to’d like to affix the channel for BTC Relay, it’s open to all at https://gitter.im/ethereum/btcrelay.  The bounty program will run for a number of weeks earlier than launching BTC Relay to Frontier.  Listed here are some objects to debate with the neighborhood and open questions for the Frontier launch:

  • what must be the primary block in BTC Relay?

    • for technical and sensible causes, the earliest block that may be saved in BTC Relay is block 2016 (first problem retarget).  BTC Relay’s first block should be on a problem retarget, ie a block divisible by 2016.

  • how seemingly are you to confirm Bitcoin transactions from some time in the past?
  • how helpful would it not be if BTC Relay began with the block two problem retargets in the past?

    • at present, that may be block 389088

  • there’s a script that anybody can run to submit block headers to BTC Relay and what do you suppose its default charge, which verifiers of a Bitcoin transaction pay in ETH, must be?

    • script’s current fee is 0
    • it often prices lower than 0.01 ETH to submit a block header.  ought to the default charge be 0.01 ETH?
    • this default charge might be overridden to no matter submitter needs, though the inducement mechanism makes it in order that setting the charge excessively is unlikely to be rewarding

Lastly, the BTC Relay Bounty Program was added in “information & updates” to bounty.ethdev.com a few weeks in the past, and has already attracted 1 bounty submission!





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