bitcoin-tx-lib/src/transaction.test.ts

A Typescript library for building and signing Bitcoin transactions

import { ECPairKey } from "./ecpairkey"
import { Transaction } from "./transaction"

describe("transaction", () => {
    
    const pairkey = ECPairKey.fromWif("92n4i3QMN55FTaxZh7JUz3QLg5HkawCDjh4AEcBwpvK61YX893g", {
        network: "testnet",
    })

    const transaction = new Transaction(pairkey)
    
    test("add input transaction", () => {
        transaction.addInput({
            txid: "16945364992874171da102f987c217f3ff13bb4817957f6a030169083a8ac8f0",
            scriptPubKey: "76a914a8439c50793b033df810de257b313144a8f7edc988ac",
            value: 29128, 
            vout: 1
        })
        expect(1).toBe(transaction.inputs.length)

        // add existent input
        try {
            transaction.addInput({
                txid: "16945364992874171da102f987c217f3ff13bb4817957f6a030169083a8ac8f0",
                scriptPubKey: "76a914a8439c50793b033df810de257b313144a8f7edc988ac",
                value: 29128, 
                vout: 1
            })
        } catch {}
        expect(1).toBe(transaction.inputs.length)

        // add invalid input
        try {
            transaction.addInput({
                txid: "1694536499287417a102f987c217f3ff13bb4817957f6a030169083a8ac8f0",
                scriptPubKey: "76a914a8439c50793b033df810de257b313144a8f7edc988ac",
                value: 29128, 
                vout: 1
            })
        } catch {}
        expect(1).toBe(transaction.inputs.length)
    })

    test("add output transaction", () => {
        transaction.addOutput({
            address: "tb1q4mqy9h6km8wzltgtxra0vt4efuruhg7vh8hlvf",
            amount: (29128) - 500 
        })
        expect(1).toBe(transaction.outputs.length)
        // add invalid input address
        try {
            transaction.addOutput({
                address: "tb1q4mqy9h6km8wzltgtxra0vt4ffuruhg7vh8hlvf",
                amount: (29128) - 500 
            })
        } catch {}
        expect(1).toBe(transaction.outputs.length)
        
        let raw = transaction.outputsRaw()

        expect(raw).toBe("d46f000000000000160014aec042df56d9dc2fad0b30faf62eb94f07cba3cc")
    })

    test("transaction non segwit P2PKH", () => {
        transaction.clear()

        transaction.addInput({
            txid: "16945364992874171da102f987c217f3ff13bb4817957f6a030169083a8ac8f0",
            scriptPubKey: "76a914a8439c50793b033df810de257b313144a8f7edc988ac",
            value: 29128, 
            vout: 1
        })

        transaction.addOutput({
            address: "tb1q4mqy9h6km8wzltgtxra0vt4efuruhg7vh8hlvf",
            amount: (29128) - 500 
        })

        expect(transaction.isSegwit()).toBe(false)
        expect([752, 756]).toContain(transaction.weight())
        expect([188, 189]).toContain(transaction.vBytes())
    })

    test("segwit transaction P2PWKH", () => {
        transaction.clear()

        transaction.addInput({
            txid: "16945364992874171da102f987c217f3ff13bb4817957f6a030169083a8ac8f0",
            scriptPubKey: "0014a8439c50793b033df810de257b313144a8f7edc9",
            value: 29128, 
            vout: 1
        })

        transaction.addOutput({
            address: "tb1q4mqy9h6km8wzltgtxra0vt4efuruhg7vh8hlvf",
            amount: (29128) - 500 
        })

        expect(transaction.isSegwit()).toBe(true)
        expect([437,438]).toContain(transaction.weight())
        expect([109,110, 111]).toContain(transaction.vBytes())
    })

    test("get txid", () => {
        let txid = transaction.getTxid()

        expect(txid).toBe("17565349e3a89ec73e5c9fa68da322500f702215be9f75acb4fe953a9546fc59")
    })

    test("output raw", () => {
        let raw = transaction.outputsRaw()

        expect(raw).toBe("d46f000000000000160014aec042df56d9dc2fad0b30faf62eb94f07cba3cc")
    })

    test("verify segwit", () => {
        const result = transaction.isSegwit()

        expect(result).toBe(true)
    })
})