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fix: False positive coinjoin (#6464)

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rodribp 2026-06-09 00:21:51 -06:00
parent ffb913da09
commit bf60cf721e
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2 changed files with 18 additions and 2 deletions
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10
backend/src/api/common.ts
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@ -749,7 +749,15 @@ export class Common {
// fast but bad heuristic to detect possible coinjoins
// (at least 5 inputs and 5 outputs, less than half of which are unique amounts, with no address reuse)
const addressReuse = Object.keys(reusedOutputAddresses).reduce((acc, key) => Math.max(acc, (reusedInputAddresses[key] || 0) + (reusedOutputAddresses[key] || 0)), 0) > 1;
if (!addressReuse && tx.vin.length >= 5 && tx.vout.length >= 5 && (Object.keys(inValues).length + Object.keys(outValues).length) <= (tx.vin.length + tx.vout.length) / 2 ) {
const tokenRelated = (flags & (TransactionFlags.inscription | TransactionFlags.op_return)) !== 0n;
if (!addressReuse &&
tx.vin.length >= 5 &&
tx.vout.length >= 5 &&
(Object.keys(inValues).length + Object.keys(outValues).length) <= (tx.vin.length + tx.vout.length) / 2 &&
!tokenRelated &&
tx.vin.length / tx.vout.length < 5 &&
tx.vin.length / tx.vout.length > 0.2
) {
flags |= TransactionFlags.coinjoin;
}
// more than 5:1 input:output ratio