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Add support for inscription goggles for non-esplora backends

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Mononaut 2024-04-04 12:32:03 +00:00
parent 896c451c3e
commit 287559f028
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GPG key ID: A3F058E41374C04E
1 changed files with 38 additions and 22 deletions
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60
backend/src/api/common.ts
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@ -373,6 +373,21 @@ export class Common {
].includes(pubkey);
}
static isInscription(vin, flags): bigint {
// in taproot, if the last witness item begins with 0x50, it's an annex
const hasAnnex = vin.witness?.[vin.witness.length - 1].startsWith('50');
// script spends have more than one witness item, not counting the annex (if present)
if (vin.witness.length > (hasAnnex ? 2 : 1)) {
// the script itself is the second-to-last witness item, not counting the annex
const asm = vin.inner_witnessscript_asm || transactionUtils.convertScriptSigAsm(vin.witness[vin.witness.length - (hasAnnex ? 3 : 2)]);
// inscriptions smuggle data within an 'OP_0 OP_IF ... OP_ENDIF' envelope
if (asm?.includes('OP_0 OP_IF')) {
flags |= TransactionFlags.inscription;
}
}
return flags;
}
static getTransactionFlags(tx: TransactionExtended): number {
let flags = tx.flags ? BigInt(tx.flags) : 0n;
@ -409,30 +424,31 @@ export class Common {
if (vin.sequence < 0xfffffffe) {
rbf = true;
}
switch (vin.prevout?.scriptpubkey_type) {
case 'p2pk': flags |= TransactionFlags.p2pk; break;
case 'multisig': flags |= TransactionFlags.p2ms; break;
case 'p2pkh': flags |= TransactionFlags.p2pkh; break;
case 'p2sh': flags |= TransactionFlags.p2sh; break;
case 'v0_p2wpkh': flags |= TransactionFlags.p2wpkh; break;
case 'v0_p2wsh': flags |= TransactionFlags.p2wsh; break;
case 'v1_p2tr': {
if (!vin.witness?.length) {
throw new Error('Taproot input missing witness data');
}
flags |= TransactionFlags.p2tr;
// in taproot, if the last witness item begins with 0x50, it's an annex
const hasAnnex = vin.witness?.[vin.witness.length - 1].startsWith('50');
// script spends have more than one witness item, not counting the annex (if present)
if (vin.witness.length > (hasAnnex ? 2 : 1)) {
// the script itself is the second-to-last witness item, not counting the annex
const asm = vin.inner_witnessscript_asm || transactionUtils.convertScriptSigAsm(vin.witness[vin.witness.length - (hasAnnex ? 3 : 2)]);
// inscriptions smuggle data within an 'OP_0 OP_IF ... OP_ENDIF' envelope
if (asm?.includes('OP_0 OP_IF')) {
flags |= TransactionFlags.inscription;
if (vin.prevout?.scriptpubkey_type) {
switch (vin.prevout?.scriptpubkey_type) {
case 'p2pk': flags |= TransactionFlags.p2pk; break;
case 'multisig': flags |= TransactionFlags.p2ms; break;
case 'p2pkh': flags |= TransactionFlags.p2pkh; break;
case 'p2sh': flags |= TransactionFlags.p2sh; break;
case 'v0_p2wpkh': flags |= TransactionFlags.p2wpkh; break;
case 'v0_p2wsh': flags |= TransactionFlags.p2wsh; break;
case 'v1_p2tr': {
if (!vin.witness?.length) {
throw new Error('Taproot input missing witness data');
}
flags |= TransactionFlags.p2tr;
flags = Common.isInscription(vin, flags);
} break;
}
} else {
// no prevouts, optimistically check witness-bearing inputs
if (vin.witness?.length >= 2) {
try {
flags = Common.isInscription(vin, flags);
} catch {
// witness script parsing will fail if this isn't really a taproot output
}
} break;
}
}
// sighash flags