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Add non-standard Goggles filter
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Mononaut
parent
1deacb9996
commit
249c57f376
4 changed files with 162 additions and 1 deletions
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@ -7,6 +7,24 @@ import { isIP } from 'net';
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import transactionUtils from './transaction-utils';
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import { isPoint } from '../utils/secp256k1';
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import logger from '../logger';
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import { getVarIntLength, opcodes, parseMultisigScript } from '../utils/bitcoin-script';
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// Bitcoin Core default policy settings
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const TX_MAX_STANDARD_VERSION = 2;
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const MAX_STANDARD_TX_WEIGHT = 400_000;
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const MAX_BLOCK_SIGOPS_COST = 80_000;
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const MAX_STANDARD_TX_SIGOPS_COST = (MAX_BLOCK_SIGOPS_COST / 5);
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const MIN_STANDARD_TX_NONWITNESS_SIZE = 65;
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const MAX_P2SH_SIGOPS = 15;
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const MAX_STANDARD_P2WSH_STACK_ITEMS = 100;
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const MAX_STANDARD_P2WSH_STACK_ITEM_SIZE = 80;
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const MAX_STANDARD_TAPSCRIPT_STACK_ITEM_SIZE = 80;
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const MAX_STANDARD_P2WSH_SCRIPT_SIZE = 3600;
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const MAX_STANDARD_SCRIPTSIG_SIZE = 1650;
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const DUST_RELAY_TX_FEE = 3;
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const MAX_OP_RETURN_RELAY = 83;
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const DEFAULT_PERMIT_BAREMULTISIG = true;
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export class Common {
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static nativeAssetId = config.MEMPOOL.NETWORK === 'liquidtestnet' ?
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'144c654344aa716d6f3abcc1ca90e5641e4e2a7f633bc09fe3baf64585819a49'
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@ -177,6 +195,141 @@ export class Common {
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);
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}
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/**
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* Validates most standardness rules
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*
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* returns true early if any standardness rule is violated, otherwise false
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* (except for non-mandatory-script-verify-flag and p2sh script evaluation rules which are *not* enforced)
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*/
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static isNonStandard(tx: TransactionExtended): boolean {
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// version
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if (tx.version > TX_MAX_STANDARD_VERSION) {
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return true;
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}
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// tx-size
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if (tx.weight > MAX_STANDARD_TX_WEIGHT) {
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return true;
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}
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// tx-size-small
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if (this.getNonWitnessSize(tx) < MIN_STANDARD_TX_NONWITNESS_SIZE) {
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return true;
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}
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// bad-txns-too-many-sigops
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if (tx.sigops && tx.sigops > MAX_STANDARD_TX_SIGOPS_COST) {
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return true;
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}
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// input validation
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for (const vin of tx.vin) {
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if (vin.is_coinbase) {
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// standardness rules don't apply to coinbase transactions
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return false;
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}
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// scriptsig-size
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if ((vin.scriptsig.length / 2) > MAX_STANDARD_SCRIPTSIG_SIZE) {
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return true;
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}
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// scriptsig-not-pushonly
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if (vin.scriptsig_asm) {
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for (const op of vin.scriptsig_asm.split(' ')) {
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if (opcodes[op] && opcodes[op] > opcodes['OP_16']) {
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return true;
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}
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}
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}
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// bad-txns-nonstandard-inputs
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if (vin.prevout?.scriptpubkey_type === 'p2sh') {
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// TODO: evaluate script (https://github.com/bitcoin/bitcoin/blob/1ac627c485a43e50a9a49baddce186ee3ad4daad/src/policy/policy.cpp#L177)
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// countScriptSigops returns the witness-scaled sigops, so divide by 4 before comparison with MAX_P2SH_SIGOPS
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const sigops = (transactionUtils.countScriptSigops(vin.inner_redeemscript_asm) / 4);
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if (sigops > MAX_P2SH_SIGOPS) {
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return true;
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}
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} else if (['unknown', 'provably_unspendable', 'empty'].includes(vin.prevout?.scriptpubkey_type || '')) {
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return true;
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}
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// TODO: bad-witness-nonstandard
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}
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// output validation
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let opreturnCount = 0;
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for (const vout of tx.vout) {
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// scriptpubkey
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if (['unknown', 'provably_unspendable', 'empty'].includes(vout.scriptpubkey_type)) {
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// (non-standard output type)
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return true;
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} else if (vout.scriptpubkey_type === 'multisig') {
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if (!DEFAULT_PERMIT_BAREMULTISIG) {
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// bare-multisig
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return true;
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}
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const mOfN = parseMultisigScript(vout.scriptpubkey_asm);
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if (!mOfN || mOfN.n < 1 || mOfN.n > 3 || mOfN.m < 1 || mOfN.m > mOfN.n) {
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// (non-standard bare multisig threshold)
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return true;
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}
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} else if (vout.scriptpubkey_type === 'op_return') {
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opreturnCount++;
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if ((vout.scriptpubkey.length / 2) > MAX_OP_RETURN_RELAY) {
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// over default datacarrier limit
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return true;
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}
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}
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// dust
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// (we could probably hardcode this for the different output types...)
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if (vout.scriptpubkey_type !== 'op_return') {
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let dustSize = (vout.scriptpubkey.length / 2);
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// add varint length overhead
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dustSize += getVarIntLength(dustSize);
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// add value size
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dustSize += 8;
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if (['v0_p2wpkh', 'v0_p2wsh', 'v1_p2tr'].includes(vout.scriptpubkey_type)) {
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dustSize += 67;
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} else {
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dustSize += 148;
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}
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if (vout.value < (dustSize * DUST_RELAY_TX_FEE)) {
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// under minimum output size
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console.log(`NON-STANDARD | dust | ${vout.value} | ${dustSize} ${dustSize * DUST_RELAY_TX_FEE} `, tx.txid);
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return true;
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}
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}
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}
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// multi-op-return
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if (opreturnCount > 1) {
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return true;
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}
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// TODO: non-mandatory-script-verify-flag
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return false;
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}
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static getNonWitnessSize(tx: TransactionExtended): number {
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let weight = tx.weight;
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let hasWitness = false;
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for (const vin of tx.vin) {
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if (vin.witness?.length) {
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hasWitness = true;
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// witness count
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weight -= getVarIntLength(vin.witness.length);
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for (const witness of vin.witness) {
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// witness item size + content
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weight -= getVarIntLength(witness.length / 2) + (witness.length / 2);
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}
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}
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}
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if (hasWitness) {
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// marker & segwit flag
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weight -= 2;
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}
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return Math.ceil(weight / 4);
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}
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static setSegwitSighashFlags(flags: bigint, witness: string[]): bigint {
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for (const w of witness) {
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if (this.isDERSig(w)) {
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@ -351,6 +504,10 @@ export class Common {
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flags |= TransactionFlags.batch_payout;
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}
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if (this.isNonStandard(tx)) {
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flags |= TransactionFlags.nonstandard;
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}
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return Number(flags);
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}
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@ -209,6 +209,7 @@ export const TransactionFlags = {
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v1: 0b00000100n,
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v2: 0b00001000n,
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v3: 0b00010000n,
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nonstandard: 0b00100000n,
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// address types
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p2pk: 0b00000001_00000000n,
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p2ms: 0b00000010_00000000n,
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@ -8,6 +8,7 @@
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[showFilters]="showFilters"
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[filterFlags]="filterFlags"
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[filterMode]="filterMode"
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[excludeFilters]="['nonstandard']"
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[overrideColors]="overrideColors"
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(txClickEvent)="onTxClick($event)"
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></app-block-overview-graph>
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@ -22,6 +22,7 @@ export const TransactionFlags = {
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v1: 0b00000100n,
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v2: 0b00001000n,
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v3: 0b00010000n,
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nonstandard: 0b00100000n,
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// address types
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p2pk: 0b00000001_00000000n,
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p2ms: 0b00000010_00000000n,
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@ -66,6 +67,7 @@ export const TransactionFilters: { [key: string]: Filter } = {
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v1: { key: 'v1', label: 'Version 1', flag: TransactionFlags.v1, toggle: 'version' },
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v2: { key: 'v2', label: 'Version 2', flag: TransactionFlags.v2, toggle: 'version' },
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v3: { key: 'v3', label: 'Version 3', flag: TransactionFlags.v3, toggle: 'version' },
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nonstandard: { key: 'nonstandard', label: 'Non-Standard', flag: TransactionFlags.nonstandard, important: true },
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/* address types */
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p2pk: { key: 'p2pk', label: 'P2PK', flag: TransactionFlags.p2pk, important: true },
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p2ms: { key: 'p2ms', label: 'Bare multisig', flag: TransactionFlags.p2ms, important: true },
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@ -96,7 +98,7 @@ export const TransactionFilters: { [key: string]: Filter } = {
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};
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export const FilterGroups: { label: string, filters: Filter[]}[] = [
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{ label: 'Features', filters: ['rbf', 'no_rbf', 'v1', 'v2', 'v3'] },
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{ label: 'Features', filters: ['rbf', 'no_rbf', 'v1', 'v2', 'v3', 'nonstandard'] },
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{ label: 'Address Types', filters: ['p2pk', 'p2ms', 'p2pkh', 'p2sh', 'p2wpkh', 'p2wsh', 'p2tr'] },
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{ label: 'Behavior', filters: ['cpfp_parent', 'cpfp_child', 'replacement', 'acceleration'] },
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{ label: 'Data', filters: ['op_return', 'fake_pubkey', 'inscription'] },
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