sha3-addons: add PURE annotations to reduce bundle size

Author: paulmillr

src/sha3-addons.ts

@@ -50,8 +50,8 @@ const gencShake = (suffix: number, blockLen: number, outputLen: number) =>
     cshakePers(new Keccak(blockLen, suffix, chooseLen(opts, outputLen), true), opts)
   );
 
-export const cshake128 = gencShake(0x1f, 168, 128 / 8);
-export const cshake256 = gencShake(0x1f, 136, 256 / 8);
+export const cshake128 = /* @__PURE__ */ (() => gencShake(0x1f, 168, 128 / 8))();
+export const cshake256 = /* @__PURE__ */ (() => gencShake(0x1f, 136, 256 / 8))();
 
 class KMAC extends Keccak implements HashXOF<KMAC> {
   constructor(
@@ -99,10 +99,10 @@ function genKmac(blockLen: number, outputLen: number, xof = false) {
   return kmac;
 }
 
-export const kmac128 = genKmac(168, 128 / 8);
-export const kmac256 = genKmac(136, 256 / 8);
-export const kmac128xof = genKmac(168, 128 / 8, true);
-export const kmac256xof = genKmac(136, 256 / 8, true);
+export const kmac128 = /* @__PURE__ */ (() => genKmac(168, 128 / 8))();
+export const kmac256 = /* @__PURE__ */ (() => genKmac(136, 256 / 8))();
+export const kmac128xof = /* @__PURE__ */ (() => genKmac(168, 128 / 8, true))();
+export const kmac256xof = /* @__PURE__ */ (() => genKmac(136, 256 / 8, true))();
 
 // TupleHash
 // Usage: tuple(['ab', 'cd']) != tuple(['a', 'bcd'])
@@ -142,10 +142,10 @@ function genTuple(blockLen: number, outputLen: number, xof = false) {
   return tuple;
 }
 
-export const tuplehash128 = genTuple(168, 128 / 8);
-export const tuplehash256 = genTuple(136, 256 / 8);
-export const tuplehash128xof = genTuple(168, 128 / 8, true);
-export const tuplehash256xof = genTuple(136, 256 / 8, true);
+export const tuplehash128 = /* @__PURE__ */ (() => genTuple(168, 128 / 8))();
+export const tuplehash256 = /* @__PURE__ */ (() => genTuple(136, 256 / 8))();
+export const tuplehash128xof = /* @__PURE__ */ (() => genTuple(168, 128 / 8, true))();
+export const tuplehash256xof = /* @__PURE__ */ (() => genTuple(136, 256 / 8, true))();
 
 // ParallelHash (same as K12/M14, but without speedup for inputs less 8kb, reduced number of rounds and more simple)
 type ParallelOpts = cShakeOpts & { blockLen?: number };
@@ -217,7 +217,7 @@ class ParallelHash extends Keccak implements HashXOF<ParallelHash> {
   }
 }
 
-function genParallel(
+function genPrl(
   blockLen: number,
   outputLen: number,
   leaf: ReturnType<typeof gencShake>,
@@ -236,10 +236,10 @@ function genParallel(
   return parallel;
 }
 
-export const parallelhash128 = genParallel(168, 128 / 8, cshake128);
-export const parallelhash256 = genParallel(136, 256 / 8, cshake256);
-export const parallelhash128xof = genParallel(168, 128 / 8, cshake128, true);
-export const parallelhash256xof = genParallel(136, 256 / 8, cshake256, true);
+export const parallelhash128 = /* @__PURE__ */ (() => genPrl(168, 128 / 8, cshake128))();
+export const parallelhash256 = /* @__PURE__ */ (() => genPrl(136, 256 / 8, cshake256))();
+export const parallelhash128xof = /* @__PURE__ */ (() => genPrl(168, 128 / 8, cshake128, true))();
+export const parallelhash256xof = /* @__PURE__ */ (() => genPrl(136, 256 / 8, cshake256, true))();
 
 // Kangaroo
 // Same as NIST rightEncode, but returns [0] for zero string
@@ -327,13 +327,15 @@ class KangarooTwelve extends Keccak implements HashXOF<KangarooTwelve> {
   }
 }
 // Default to 32 bytes, so it can be used without opts
-export const k12 = wrapConstructorWithOpts<KangarooTwelve, KangarooOpts>(
-  (opts: KangarooOpts = {}) => new KangarooTwelve(168, 32, chooseLen(opts, 32), 12, opts)
-);
+export const k12 = /* @__PURE__ */ (() =>
+  wrapConstructorWithOpts<KangarooTwelve, KangarooOpts>(
+    (opts: KangarooOpts = {}) => new KangarooTwelve(168, 32, chooseLen(opts, 32), 12, opts)
+  ))();
 // MarsupilamiFourteen
-export const m14 = wrapConstructorWithOpts<KangarooTwelve, KangarooOpts>(
-  (opts: KangarooOpts = {}) => new KangarooTwelve(136, 64, chooseLen(opts, 64), 14, opts)
-);
+export const m14 = /* @__PURE__ */ (() =>
+  wrapConstructorWithOpts<KangarooTwelve, KangarooOpts>(
+    (opts: KangarooOpts = {}) => new KangarooTwelve(136, 64, chooseLen(opts, 64), 14, opts)
+  ))();
 
 // https://keccak.team/files/CSF-0.1.pdf
 // + https://github.com/XKCP/XKCP/tree/master/lib/high/Keccak/PRG