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Transaction.ts
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Transaction.ts
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import { Transaction } from "bitcoinjs-lib";
import Schema, { boolean, Type } from "computed-types";
import { db } from "../Database";
import { isCoinbase, RawTransaction, rpc, Vout } from "../Services/Bitcoin";
import { ord as ordService } from "../Services/Ord";
import { getAddressessFromVout } from "./Address";
/*
|--------------------------------------------------------------------------------
| Schema
|--------------------------------------------------------------------------------
*/
export const schema = {
expand: {
default: Object.freeze({
ord: false,
hex: false,
witness: false,
}),
options: Schema({
ord: boolean.optional(),
hex: boolean.optional(),
witness: boolean.optional(),
}),
},
} as const;
/*
|--------------------------------------------------------------------------------
| Methods
|--------------------------------------------------------------------------------
*/
export async function getExpandedTransaction(
tx: RawTransaction,
{ ord = false, hex = false, witness = false }: ExpandOptions = {},
): Promise<ExpandedTransaction> {
let fee = 0;
let coinbase = false;
for (const vin of tx.vin) {
if (isCoinbase(vin)) {
coinbase = true;
continue;
}
if (witness === false) {
delete (vin as any).txinwitness;
}
const vinTx = await rpc.transactions.getRawTransaction(vin.txid, true);
(vin as any).value = vinTx.vout[vin.vout].value;
(vin as any).address = getAddressessFromVout(vinTx.vout[vin.vout])[0];
fee += vinTx.vout[vin.vout].value;
}
for (const vout of tx.vout) {
const outpoint = `${tx.txid}:${vout.n}`;
if (ord === true) {
(vout as any).ordinals = await ordService.getOrdinals(outpoint);
(vout as any).inscriptions = await db.inscriptions.getInscriptionsByOutpoint(outpoint);
}
(vout as any).spent = (await db.outputs.getVinLocation(outpoint)) ?? false;
fee -= vout.value;
}
if (hex === false) {
delete (tx as any).hex;
}
(tx as ExpandedTransaction).fee = coinbase ? 0 : fee;
(tx as ExpandedTransaction).blockheight = (await rpc.blockchain.getBlockCount()) - tx.confirmations + 1;
return tx as ExpandedTransaction;
}
export async function getTransactionFee(tx: RawTransaction): Promise<number> {
let fee = 0;
for (const vin of tx.vin) {
if (isCoinbase(vin)) {
continue;
}
const tx = await rpc.transactions.getRawTransaction(vin.txid, true);
fee += tx.vout[vin.vout].value;
}
for (const vout of tx.vout) {
fee -= vout.value;
}
return fee;
}
export function getTransactionAmount(tx: RawTransaction): number {
let amount = 0;
for (const vout of tx.vout) {
amount += vout.value;
}
return amount;
}
/*
|--------------------------------------------------------------------------------
| Utilities
|--------------------------------------------------------------------------------
*/
export async function getTransactionOutputHex(txid: string, vout: number): Promise<string | undefined> {
const transaction = await rpc.transactions.getRawTransaction(txid, true);
if (transaction === undefined) {
return undefined;
}
const utxo = transaction.vout[vout];
if (utxo === undefined) {
return undefined;
}
return utxo.scriptPubKey.hex;
}
export function parseLocation(location: string): [string, number] {
const [txid, vout] = location.split(":");
if (txid === undefined || vout === undefined) {
throw new Error(`Failed to parse location ${location}`);
}
return [txid, parseInt(vout)];
}
export function decodeRawTransaction(hex: string): Transaction | undefined {
try {
return Transaction.fromHex(hex);
} catch (_) {
return undefined;
}
}
export function getNullData(asm: string): string | undefined {
if (asm.includes("OP_RETURN")) {
return Buffer.from(asm.replace("OP_RETURN", "").trim(), "hex").toString();
}
}
/*
|--------------------------------------------------------------------------------
| Types
|--------------------------------------------------------------------------------
*/
export type ExpandOptions = Type<typeof schema.expand.options>;
export type ExpandVoutsOptions = {
nooip?: boolean;
meta?: any;
};
export type ExpandedTransaction = RawTransaction & {
vout: (Vout & {
ordinals: any[];
inscriptions: any[];
spent: string | false;
})[];
fee: number;
blockheight: number;
};