🎨 Improved folder structure

constants/index.ts

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+export const BLOCKSTREAM_BASE_URL = 'https://blockstream.info/testnet/api'

functions/index.ts

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+import { RuneId, Runestone, none, some } from 'runelib'
+import ecc from '@bitcoinerlab/secp256k1'
+import { Psbt, networks, payments } from 'bitcoinjs-lib'
+import ECPairFactory, { ECPairAPI, ECPairInterface } from 'ecpair'
+import axios from 'axios'
+import { toOutputScript } from 'bitcoinjs-lib/src/address'
+import { BLOCKSTREAM_BASE_URL } from '@/constants'
+
+export async function mint() {
+  const ECPair: ECPairAPI = ECPairFactory(ecc)
+
+  const network = networks.testnet
+
+  const mintstone = new Runestone([], none(), some(new RuneId(1, 0)), some(1))
+  const keyPair = ECPair.makeRandom()
+
+  const { address } = payments.p2wpkh({ pubkey: keyPair.publicKey, network })
+
+  console.log('address:', address)
+
+  const utxos = await getUTXOs(address as string)
+  console.log(`Using UTXO ${utxos[0].txid}:${utxos[0].vout}`)
+
+  const psbt = new Psbt({ network })
+
+  psbt.addInput({
+    hash: utxos[0].txid,
+    index: utxos[0].vout,
+    witnessUtxo: {
+      value: utxos[0].value,
+      script: toOutputScript(address as string, network),
+    },
+  })
+
+  psbt.addOutput({
+    script: mintstone.encipher(),
+    value: 0,
+  })
+
+  psbt.addOutput({
+    address: 'tb1pm9rkxwrqddjjyhj8yc0s7gdt4ks5uedgehhaqu93pv9mps8xmdjq07pqgd', // ord address
+    value: 10000,
+  })
+
+  const fee = 5000
+
+  const change = utxos[0].value - fee - 10000
+
+  psbt.addOutput({
+    address: '2N9jgK3Cv8CocHu9ViDvPJhYMmkaeHJojR5', // change address
+    value: change,
+  })
+
+  await signAndSend(keyPair, psbt, address as string)
+}
+
+async function signAndSend(
+  keyPair: ECPairInterface,
+  psbt: Psbt,
+  address: string
+) {
+  psbt.signAllInputs(keyPair)
+  psbt.finalizeAllInputs()
+
+  const tx = psbt.extractTransaction()
+  const txHex = tx.toHex()
+
+  const { data } = await axios.post(`${BLOCKSTREAM_BASE_URL}/tx`, txHex)
+
+  console.log('Transaction ID:', data)
+}
+
+async function getUTXOs(address: string) {
+  const { data: utxos } = await axios.get(UTXO_URL(address))
+  console.log(utxos)
+
+  if (!utxos.length) {
+    throw Error(`No UTXOs available for address ${address}`)
+  } else {
+    return utxos
+  }
+}
+
+const UTXO_URL = (address: string) =>
+  `${BLOCKSTREAM_BASE_URL}/address/${address}/utxo`