From 46e34a78a2c3b0d4534d6509307f92a76b03388a Mon Sep 17 00:00:00 2001
From: Rafael Taranto <rafael.taranto@protonmail.com>
Date: Fri, 26 Apr 2024 10:03:24 +0100
Subject: [PATCH] feat: add lamassu bumpfee script

---
 bin/lamassu-btc-bumpfee                 | 44 +++++++++++++++++++++++++
 lib/blockexplorers/mempool.space.js     | 24 +++++++++-----
 lib/plugins/wallet/bitcoind/bitcoind.js |  1 +
 3 files changed, 61 insertions(+), 8 deletions(-)
 create mode 100644 bin/lamassu-btc-bumpfee

diff --git a/bin/lamassu-btc-bumpfee b/bin/lamassu-btc-bumpfee
new file mode 100644
index 00000000..8bf8cd04
--- /dev/null
+++ b/bin/lamassu-btc-bumpfee
@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+
+const inquirer = require('inquirer')
+
+const bitcoind = require('../lib/plugins/wallet/bitcoind/bitcoind')
+const BN = require('../lib/bn')
+const mempool = require('../lib/blockexplorers/mempool.space')
+
+const txId = process.argv[2]
+if (!txId) {
+  console.error('Please provide a BTC transaction hash as input.')
+  process.exit(1)
+}
+
+const bumpTransactionFee = async (txId) => {
+  const txData = await bitcoind.fetch('gettransaction', [txId, true, true])
+
+  const fee = new BN(txData.fee).abs().shiftedBy(8).decimalPlaces(0)
+  const size = txData.decoded.vsize
+  const satPerVb = fee.div(size)
+
+  console.log(`Current fee: ${satPerVb.toFixed(2).toString()} sat/vB`)
+
+  const recommendedFees = mempool.getSatBEstimateFees()
+
+  console.log('Recommended fees (sat/vB):', recommendedFees)
+
+  const { selectedFee } = await inquirer.prompt([
+    {
+      type: 'list',
+      name: 'selectedFee',
+      message: 'Select a fee higher than the current one:',
+      choices: Object.entries(recommendedFees)
+        .filter(([_, value]) => satPerVb.gt(value))
+        .map(([key, value]) => ({name: `${key}: ${value} sat/vB`, value})),
+    },
+  ])
+
+  await bitcoind.fetch('bumpfee', [txId, {fee_rate: selectedFee}])
+
+  console.log(`Fee bumped to ${selectedFee.toFixed(2)} sat/vB`)
+}
+
+bumpTransactionFee(txId)
\ No newline at end of file
diff --git a/lib/blockexplorers/mempool.space.js b/lib/blockexplorers/mempool.space.js
index 389d6727..383c1c72 100644
--- a/lib/blockexplorers/mempool.space.js
+++ b/lib/blockexplorers/mempool.space.js
@@ -1,8 +1,16 @@
-const axios = require("axios");
-
-const getSatBEstimateFee = () => {
-  return axios.get('https://mempool.space/api/v1/fees/recommended')
-    .then(r => r.data.hourFee)
-}
-
-module.exports = { getSatBEstimateFee }
\ No newline at end of file
+const axios = require("axios");
+
+const getSatBEstimateFee = () => {
+  return axios.get('https://mempool.space/api/v1/fees/recommended')
+    .then(r => r.data.hourFee)
+}
+
+const getSatBEstimateFees = () => {
+  return axios.get('https://mempool.space/api/v1/fees/recommended')
+    .then(r => r.data)
+}
+
+module.exports = {
+  getSatBEstimateFees,
+  getSatBEstimateFee
+}
\ No newline at end of file
diff --git a/lib/plugins/wallet/bitcoind/bitcoind.js b/lib/plugins/wallet/bitcoind/bitcoind.js
index ad979a5c..ba5d17ae 100644
--- a/lib/plugins/wallet/bitcoind/bitcoind.js
+++ b/lib/plugins/wallet/bitcoind/bitcoind.js
@@ -219,5 +219,6 @@ module.exports = {
   sendCoinsBatch,
   checkBlockchainStatus,
   getTxHashesByAddress,
+  fetch,
   SUPPORTS_BATCHING
 }