Expose utils: invert, hexToBytes, concatBytes. Closes #46, #48, #63

paulmillr · May 19, 2022 · 450ebc7 · 450ebc7
1 parent 30ed53b
commit 450ebc7
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Showing 2 changed files with 4 additions and 16 deletions.
diff --git a/index.ts b/index.ts
@@ -1526,7 +1526,10 @@ export const utils = {
   },
 
   bytesToHex,
+  hexToBytes,
+  concatBytes,
   mod,
+  invert,
 
   sha256: async (...messages: Uint8Array[]): Promise<Uint8Array> => {
     if (crypto.web) {

diff --git a/test/index.ts b/test/index.ts
@@ -23,22 +23,7 @@ secp.utils.sha256Sync = (...messages: Uint8Array[]): Uint8Array => {
 
 const toBEHex = (n: number | bigint) => n.toString(16).padStart(64, '0');
 const hex = secp.utils.bytesToHex;
-// Caching slows it down 2-3x
-function hexToBytes(hex: string): Uint8Array {
-  if (typeof hex !== 'string') {
-    throw new TypeError('hexToBytes: expected string, got ' + typeof hex);
-  }
-  if (hex.length % 2) throw new Error('hexToBytes: received invalid unpadded hex' + hex.length);
-  const array = new Uint8Array(hex.length / 2);
-  for (let i = 0; i < array.length; i++) {
-    const j = i * 2;
-    const hexByte = hex.slice(j, j + 2);
-    const byte = Number.parseInt(hexByte, 16);
-    if (Number.isNaN(byte) || byte < 0) throw new Error('Invalid byte sequence');
-    array[i] = byte;
-  }
-  return array;
-}
+const hexToBytes = secp.utils.hexToBytes;
 
 function hexToNumber(hex: string): bigint {
   if (typeof hex !== 'string') {