The bid payload sent to the internal mev-commit API is as follows:

KeyDescription
txHashesArray of transaction hashes as strings
amountBid amount in wei
blockNumberL1 block number targeted for bid inclusion
decayStartTimestampStart timestamp for bid decay (in Unix milliseconds)
decayEndTimestampEnd timestamp for bid decay (in Unix milliseconds)
revertingTxHashesArray of transaction hashes as strings that can revert
rawTransactionsArray of raw signed transaction payloads

Only one out of the txHashes or rawTransactions need to be provided in the bid. If the rawTransactions is given, the txHashes are inferred from it.

Example bid
{
    "txHashes": ["0549fc7c57fffbdbfb2cf9d5e0de165fc68dadb5c27c42fdad0bdf506f4eacae", "0549fc7c57fffbdbfb2cf9d5e0de165fc68dadb5c27c42fdad0bdf506f4eacaf","0549fc7c57fffbdbfb2cf9d5e0de165fc68dadb5c27c42fdad0bdf506f4effff"],
    "amount": "100040",
    "blockNumber": 133459,
    "decayStartTimestamp": 1716935571901,
    "decayEndTimestamp": 1716935572901,
    "revertingTxHashes": ["22145ba31366d29a893ae3ffbc95c36c06e8819a289ac588594c9512d0a99810"]
}
Example bid with raw transaction payloads
{
    "rawTransactions": ["0x02f8db82426882010c8410433624841043362f8303425094ea593b730d745fb5fe01b6d20e6603915252c6bf87016e03ce313800b864ce0b63ce0000000000000000000000000e94804eaa3c4c5355992086647f683f6f41ef1f000000000000000000000000000000000000000000000000000150e0786cc000000000000000000000000000000000000000000000000000000000000004e378c001a0ece6d13b20247abdc07d669c9186ee5a1ac9601db8c98a3323024ab299cb6662a01c20680efe4e0bb48a3a936b5ab27c741819f0ac567b12b34b230004b20b78a0", "0x02f8748242682c841043362684104336318252089412b141665da4a5f617c759ad996ef91ad806a9c0880de0b6b3a764000080c001a0806552ed846808580eb896994825f07e73de2f42e2d3554f228284ecfaa89d9ca046d58b62ba565982fb07a64b436dd7a6c210b2f59c4fb2aee2cdd150ccf8bfaa"],
    "amount": "100040",
    "blockNumber": 133459,
    "decayStartTimestamp": 1716935571901,
    "decayEndTimestamp": 1716935572901,
    "revertingTxHashes": ["22145ba31366d29a893ae3ffbc95c36c06e8819a289ac588594c9512d0a99810"]
}

The final bid structure includes a hash and signature that is auto-constructed by your mev-commit bidder node and looks as follows.

{
   "txHashes":"0549fc7c57fffbdbfb2cf9d5e0de165fc68dadb5c27c42fdad0bdf506f4eacae,0549fc7c57fffbdbfb2cf9d5e0de165fc68dadb5c27c42fdad0bdf506f4eacaf,0549fc7c57fffbdbfb2cf9d5e0de165fc68dadb5c27c42fdad0bdf506f4effff",
   "amount":277610,
   "revertingTxHashes":"22145ba31366d29a893ae3ffbc95c36c06e8819a289ac588594c9512d0a99810",
   "blockNumber":2703,
   "digest":"uU2p20f5KmehWqpuY1u+CbhcS8jNwdQAJQe2dh0Vnrk=",
   "signature":"nY6jYsGPxj6LVlSVQJbZcxvmRrw8Ym5rqOL1x0W/xPlJGBaF/ZzzjkxiioY/MDiRGvlflSWeoT0fh3aIJiJxAhw=",
   "decayStartTimestamp":1716935571901,
   "decayEndTimestamp": 1716935572901,
   "nikePublicKey": "04c631d017981efdc0c319b475de36389a10ede86fbbc9adcf573844a858ce8ddcddb41306eb9c34ec4ee9bc0234f7e30684bf389142437166d407e47974d5cbf7"
}

Note that the deposit amount a bidder has set needs to be 10 times higher than the amount in the bid.

​
Details on Bid Structure

PropertyDescription
txnHashesArray of transaction hashes represented as strings
amountAmount to bid in wei
blockNumberL1 target block to have bid included
decayStartTimestampStart timestamp for bid decay (in Unix milliseconds)
decayEndTimestampEnd timestamp for bid decay (in Unix milliseconds)
bidDigestHash of the bid
bidSignatureSigned bidВigest = sign(bidDigest, signingKey)
nikePublicKeyNIKE public key of the bidder, autogenerated for each bid
revertingTxHashesArray of transaction hashes as strings that can revert

​
Details on Decay Parameters

The decayStartTimestamp and decayEndTimestamp parameters allow bidders to control the range over which their bid decays.

Due to inherent network delays, preconfirmation times can range between 50 to 250 milliseconds even if providers commit immediately after seeing the bid. To account for this, you might want to set your decayStartTimestamp approximately 300 milliseconds in the future. However, setting this delay is not mandatory and should be adjusted based on your strategic preferences for bid timing and pricing. For more detailed information about the decay mechanism, refer to the Bid Decay Page.

​
Details on Encrypted Bid Structure

The bid structure is encrypted using an AES key, which the bidder P2P node generates at the start, and is then sent to the provider.

{
    "ciphertext": "5750d8af6296296f1147f5e11f47f253f376dea3fd5c2760cd82bd82a7066a8fe1c84f48a4e738d1df7c0e64f930c6b0b642800156e453a501c8b993951fcb50fe0b9fce4a2046838f499317a6018eb59abd5e84dbe3b7e296d4e0e70ef3bb221af7afe341908dbd02e8c91b4eff935b2697208f51ccacf5fe744c199afca687d85850a2e12a75433510dccda9258612348c586e971cc521486806ea25ec94d5fa7038beda3f532970e7b06198deef96677af3a6889c84d657585a9eefd224961f87a3353ad4ede4a7368e2e5bc9571d320a8a3be0f1e08e769f9bb2da6fb76c81cd"
}
Builder AttributionReverting txns