refactor: use `{Read,Write}BE32` helpers for BIP32 nChild (de)serialization

1 files changed, 1 insertions, 4 deletions

diff --git a/src/hash.cpp b/src/hash.cpp
index 92c923fbd2..0e5bd975e4 100644
--- a/src/hash.cpp
+++ b/src/hash.cpp
@@ -75,10 +75,7 @@ unsigned int MurmurHash3(unsigned int nHashSeed, Span<const unsigned char> vData
 void BIP32Hash(const ChainCode &chainCode, unsigned int nChild, unsigned char header, const unsigned char data[32], unsigned char output[64])
 {
     unsigned char num[4];
-    num[0] = (nChild >> 24) & 0xFF;
-    num[1] = (nChild >> 16) & 0xFF;
-    num[2] = (nChild >>  8) & 0xFF;
-    num[3] = (nChild >>  0) & 0xFF;
+    WriteBE32(num, nChild);
     CHMAC_SHA512(chainCode.begin(), chainCode.size()).Write(&header, 1).Write(data, 32).Write(num, 4).Finalize(output);
 }