| rskip | title | created | author | purpose | layer | complexity | status | description |
|---|---|---|---|---|---|---|---|---|
460 |
Ignore non-standard outputs when searching for the witness commitment hash |
12-DEC-24 |
MI |
Usa,Sec |
Core |
1 |
Draft |
| RSKIP | 460 |
|---|---|
| Title | Ignore non-standard outputs when searching for the witness commitment hash |
| Created | 12-DEC-24 |
| Author | MI |
| Purpose | Usa,Sec |
| Layer | Core |
| Complexity | 1 |
| Status | Draft |
Coinbase transactions may sometimes contain non-standard outputs that cause the Bridge to fail parsing them. When iterating through the outputs of a coinbase transaction in search for the witness commitment hash, non-standard outputs should be ignored and continue searching through the remaining outputs.
When a Bitcoin coinbase transaction is registered in the Bridge via registerBtcCoinbaseTransaction method, the provided witness information needs to be validated against the witness commitment hash included in the coinbase transaction [1]. To find the witness commitment in the transaction, the Bridge iterates through all the outputs in reverse order until the one containing the witness information is identified. Some of the outputs may have a non-standard format, causing the Bridge to fail parsing them. Those outputs should simply be ignored and move on to the next one until the one containing the witness information is found.
Examples of transactions with non-standard outputs:
- Testnet: https://mempool.space/testnet/tx/ae0a6c774908d3ddd334d40cc385ef1c2ad7e6381a69058114899f5ce567f26c
- Mainnet: https://mempool.space/tx/079e68032d9a4cdb222f464b9966756ccb749633aee678c6a51536b4fc38e29c
When searching for the witness commitment hash in a coinbase transaction, ignore malformed or non-standard outputs and keep iterating through the remaining outputs.
This change is a hard fork and therefore all full nodes must be updated.
[1] BIP141 - Segregated Witness
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