refactor: move non-exported function to the bottom

Author: motorina0

ts_src/payments/taprootutils.ts

@@ -93,17 +93,17 @@ export function tapLeafHash(script: Buffer, version?: number): Buffer {
   );
 }
 
-function tapBranchHash(a: Buffer, b: Buffer): Buffer {
-  return bcrypto.taggedHash(TAP_BRANCH_TAG, NBuffer.concat([a, b]));
-}
-
 export function tapTweakHash(pubKey: Buffer, h: Buffer | undefined): Buffer {
   return bcrypto.taggedHash(
     TAP_TWEAK_TAG,
     NBuffer.concat(h ? [pubKey, h] : [pubKey]),
   );
 }
 
+function tapBranchHash(a: Buffer, b: Buffer): Buffer {
+  return bcrypto.taggedHash(TAP_BRANCH_TAG, NBuffer.concat([a, b]));
+}
+
 function serializeScript(s: Buffer): Buffer {
   const varintLen = varuint.encodingLength(s.length);
   const buffer = NBuffer.allocUnsafe(varintLen); // better