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system/node_modules/ethers/src.ts/crypto/keccak.ts

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+/**
+ *  Cryptographic hashing functions
+ *
+ *  @_subsection: api/crypto:Hash Functions [about-crypto-hashing]
+ */
+
+import { keccak_256 } from "@noble/hashes/sha3";
+
+import { getBytes, hexlify } from "../utils/index.js";
+
+import type { BytesLike } from "../utils/index.js";
+
+
+let locked = false;
+
+const _keccak256 = function(data: Uint8Array): Uint8Array {
+    return keccak_256(data);
+}
+
+let __keccak256: (data: Uint8Array) => BytesLike = _keccak256;
+
+/**
+ *  Compute the cryptographic KECCAK256 hash of %%data%%.
+ *
+ *  The %%data%% **must** be a data representation, to compute the
+ *  hash of UTF-8 data use the [[id]] function.
+ *
+ *  @returns DataHexstring
+ *  @example:
+ *    keccak256("0x")
+ *    //_result:
+ *
+ *    keccak256("0x1337")
+ *    //_result:
+ *
+ *    keccak256(new Uint8Array([ 0x13, 0x37 ]))
+ *    //_result:
+ *
+ *    // Strings are assumed to be DataHexString, otherwise it will
+ *    // throw. To hash UTF-8 data, see the note above.
+ *    keccak256("Hello World")
+ *    //_error:
+ */
+export function keccak256(_data: BytesLike): string {
+    const data = getBytes(_data, "data");
+    return hexlify(__keccak256(data));
+}
+keccak256._ = _keccak256;
+keccak256.lock = function(): void { locked = true; }
+keccak256.register = function(func: (data: Uint8Array) => BytesLike) {
+    if (locked) { throw new TypeError("keccak256 is locked"); }
+    __keccak256 = func;
+}
+Object.freeze(keccak256);