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Add an anyone-can-pay output to every Bitcoin transaction

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Resolves #284.
This commit is contained in:
Luke Parker 2024-09-11 02:48:53 -04:00
parent 93c7d06684
commit 76a3f3ec4b
1 changed files with 13 additions and 1 deletions
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14
processor/bitcoin/src/scheduler.rs
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@ -59,10 +59,22 @@ fn signable_transaction<D: Db>(
})
})
.collect::<Vec<_>>();
/*
Push a payment to a key with a known private key which anyone can spend. If this transaction
gets stuck, this lets anyone create a child transaction spending this output, raising the fee,
getting the transaction unstuck (via CPFP).
*/
payments.push(Payment::new(
// The generator is even so this is valid
Address::new(p2tr_script_buf(<Secp256k1 as Ciphersuite>::G::GENERATOR)),
// This uses the minimum output value allowed, as defined as a constant in bitcoin-serai
Balance { coin: Coin::Bitcoin, amount: Amount(bitcoin_serai::wallet::DUST) },
None,
));
let change = change
.map(<Planner as TransactionPlanner<Rpc<D>, EffectedReceivedOutputs<Rpc<D>>>>::change_address);
// TODO: ACP output
BSignableTransaction::new(
inputs.clone(),
&payments