From a883e1c9478e16c1d8bc395a7f4e638edece6920 Mon Sep 17 00:00:00 2001
From: netbonus <151201453+netbonus@users.noreply.github.com>
Date: Mon, 26 Feb 2024 10:04:25 -0500
Subject: [PATCH] add more address fetch reqs

---
 .nvmrc               |  1 +
 src/api/addresses.ts | 68 +++++++++++++++++++++-----------------------
 src/constants.ts     | 27 ++++++++++++++++++
 3 files changed, 61 insertions(+), 35 deletions(-)
 create mode 100644 .nvmrc

diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 00000000..19c7bdba
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+16
\ No newline at end of file
diff --git a/src/api/addresses.ts b/src/api/addresses.ts
index 6bbf3a17..6f36ccba 100644
--- a/src/api/addresses.ts
+++ b/src/api/addresses.ts
@@ -1,6 +1,9 @@
 import {
+  BTC_LEGACY_CHANGE_DERIVATION,
   BTC_LEGACY_DERIVATION,
+  BTC_SEGWIT_CHANGE_DERIVATION,
   BTC_SEGWIT_DERIVATION,
+  BTC_WRAPPED_SEGWIT_CHANGE_DERIVATION,
   BTC_WRAPPED_SEGWIT_DERIVATION,
   DEFAULT_ETH_DERIVATION,
   LEDGER_LEGACY_DERIVATION,
@@ -60,41 +63,36 @@ export const fetchAddress = async (
   }).then((addrs) => addrs[0]);
 };
 
-export const fetchBtcLegacyAddresses = async (
-  { n, startPathIndex }: FetchAddressesParams = {
-    n: MAX_ADDR,
-    startPathIndex: 0,
-  },
-) => {
-  return fetchAddresses({
-    startPath: getStartPath(BTC_LEGACY_DERIVATION, startPathIndex),
-    n,
-  });
-};
-
-export const fetchBtcSegwitAddresses = async (
-  { n, startPathIndex }: FetchAddressesParams = {
-    n: MAX_ADDR,
-    startPathIndex: 0,
-  },
-) => {
-  return fetchAddresses({
-    startPath: getStartPath(BTC_SEGWIT_DERIVATION, startPathIndex),
-    n,
-  });
-};
-
-export const fetchBtcWrappedSegwitAddresses = async (
-  { n, startPathIndex }: FetchAddressesParams = {
-    n: MAX_ADDR,
-    startPathIndex: 0,
-  },
-) => {
-  return fetchAddresses({
-    startPath: getStartPath(BTC_WRAPPED_SEGWIT_DERIVATION, startPathIndex),
-    n,
-  });
-};
+function createFetchBtcAddressesFunction(derivationPath: number[]) {
+  return async (
+    { n, startPathIndex }: FetchAddressesParams = {
+      n: MAX_ADDR,
+      startPathIndex: 0,
+    },
+  ) => {
+    return fetchAddresses({
+      startPath: getStartPath(derivationPath, startPathIndex),
+      n,
+    });
+  };
+}
+export const fetchBtcLegacyAddresses = createFetchBtcAddressesFunction(
+  BTC_LEGACY_DERIVATION,
+);
+export const fetchBtcSegwitAddresses = createFetchBtcAddressesFunction(
+  BTC_SEGWIT_DERIVATION,
+);
+export const fetchBtcWrappedSegwitAddresses = createFetchBtcAddressesFunction(
+  BTC_WRAPPED_SEGWIT_DERIVATION,
+);
+export const fetchBtcLegacyChangeAddresses = createFetchBtcAddressesFunction(
+  BTC_LEGACY_CHANGE_DERIVATION,
+);
+export const fetchBtcSegwitChangeAddresses = createFetchBtcAddressesFunction(
+  BTC_SEGWIT_CHANGE_DERIVATION,
+);
+export const fetchBtcWrappedSegwitChangeAddresses =
+  createFetchBtcAddressesFunction(BTC_WRAPPED_SEGWIT_CHANGE_DERIVATION);
 
 export const fetchSolanaAddresses = async (
   { n, startPathIndex }: FetchAddressesParams = {
diff --git a/src/constants.ts b/src/constants.ts
index 21316129..a435e792 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -521,6 +521,15 @@ export const BTC_LEGACY_DERIVATION = [
   0,
 ];
 
+/** @internal */
+export const BTC_LEGACY_CHANGE_DERIVATION = [
+  HARDENED_OFFSET + 44,
+  HARDENED_OFFSET + 0,
+  HARDENED_OFFSET,
+  0,
+  0,
+];
+
 /** @internal */
 export const BTC_SEGWIT_DERIVATION = [
   HARDENED_OFFSET + 84,
@@ -530,6 +539,15 @@ export const BTC_SEGWIT_DERIVATION = [
   0,
 ];
 
+/** @internal */
+export const BTC_SEGWIT_CHANGE_DERIVATION = [
+  HARDENED_OFFSET + 84,
+  HARDENED_OFFSET,
+  HARDENED_OFFSET,
+  1,
+  0,
+];
+
 /** @internal */
 export const BTC_WRAPPED_SEGWIT_DERIVATION = [
   HARDENED_OFFSET + 49,
@@ -539,6 +557,15 @@ export const BTC_WRAPPED_SEGWIT_DERIVATION = [
   0,
 ];
 
+/** @internal */
+export const BTC_WRAPPED_SEGWIT_CHANGE_DERIVATION = [
+  HARDENED_OFFSET + 49,
+  HARDENED_OFFSET,
+  HARDENED_OFFSET,
+  0,
+  0,
+];
+
 /** @internal */
 export const SOLANA_DERIVATION = [
   HARDENED_OFFSET + 44,