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pezkuwichain
31467f90d4
- @pezkuwi/papi-utils (rebrand of @polkadot-api/utils) - @pezkuwi/bizinikiwi-bindings (rebrand of @polkadot-api/substrate-bindings) - @pezkuwi/metadata-builders (rebrand of @polkadot-api/metadata-builders) - @pezkuwi/merkleize-metadata (rebrand of @polkadot-api/merkleize-metadata) All @polkadot-api references replaced with @pezkuwi equivalents.
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{"version":3,"file":"h64.mjs","sources":["../../../src/hashes/h64.ts"],"sourcesContent":["// Adapted implementation based on: https://github.com/pierrec/js-xxhash/blob/7ff5ced282f97dba121109d7013e0fa80360398c/lib/xxhash64.js\n\n// Distributed under the MIT software license, see the accompanying\n// file LICENSE or http://www.opensource.org/licenses/mit-license.php.\n\n// helper functions\nconst bigintFromU16 = (\n v0: number,\n v1: number,\n v2: number,\n v3: number,\n): bigint =>\n new DataView(new Uint16Array([v0, v1, v2, v3]).buffer).getBigUint64(0, true)\n\nconst MASK_64 = 2n ** 64n - 1n\n\nconst rotl = (input: bigint, nBits: bigint) =>\n ((input << nBits) & MASK_64) | (input >> (64n - nBits))\n\nconst multiply = (a: bigint, b: bigint) => (a * b) & MASK_64\n\nconst add = (a: bigint, b: bigint) => (a + b) & MASK_64\n\n// constants\nconst PRIME64_1 = 11400714785074694791n\nconst PRIME64_2 = 14029467366897019727n\nconst PRIME64_3 = 1609587929392839161n\nconst PRIME64_4 = 9650029242287828579n\nconst PRIME64_5 = 2870177450012600261n\n\nexport function h64(input: Uint8Array, seed: bigint = 0n) {\n let v1 = add(add(seed, PRIME64_1), PRIME64_2)\n let v2 = add(seed, PRIME64_2)\n let v3 = seed\n let v4 = seed - PRIME64_1\n let totalLen = input.length\n let memsize = 0\n let memory: Uint8Array | null = null\n\n ;(function update() {\n let p = 0\n let bEnd = p + totalLen\n\n if (!totalLen) return\n\n memory = new Uint8Array(32)\n\n if (totalLen < 32) {\n memory.set(input.subarray(0, totalLen), memsize)\n\n memsize += totalLen\n return\n }\n\n if (p <= bEnd - 32) {\n const limit = bEnd - 32\n\n do {\n let other\n other = bigintFromU16(\n (input[p + 1] << 8) | input[p],\n (input[p + 3] << 8) | input[p + 2],\n (input[p + 5] << 8) | input[p + 4],\n (input[p + 7] << 8) | input[p + 6],\n )\n v1 = multiply(rotl(add(v1, multiply(other, PRIME64_2)), 31n), PRIME64_1)\n p += 8\n other = bigintFromU16(\n (input[p + 1] << 8) | input[p],\n (input[p + 3] << 8) | input[p + 2],\n (input[p + 5] << 8) | input[p + 4],\n (input[p + 7] << 8) | input[p + 6],\n )\n\n v2 = multiply(rotl(add(v2, multiply(other, PRIME64_2)), 31n), PRIME64_1)\n p += 8\n other = bigintFromU16(\n (input[p + 1] << 8) | input[p],\n (input[p + 3] << 8) | input[p + 2],\n (input[p + 5] << 8) | input[p + 4],\n (input[p + 7] << 8) | input[p + 6],\n )\n\n v3 = multiply(rotl(add(v3, multiply(other, PRIME64_2)), 31n), PRIME64_1)\n p += 8\n other = bigintFromU16(\n (input[p + 1] << 8) | input[p],\n (input[p + 3] << 8) | input[p + 2],\n (input[p + 5] << 8) | input[p + 4],\n (input[p + 7] << 8) | input[p + 6],\n )\n v4 = multiply(rotl(add(v4, multiply(other, PRIME64_2)), 31n), PRIME64_1)\n p += 8\n } while (p <= limit)\n }\n\n if (p < bEnd) {\n memory.set(input.subarray(p, bEnd), memsize)\n memsize = bEnd - p\n }\n })()\n\n input = memory || input\n\n let result: bigint\n let p = 0\n\n if (totalLen >= 32) {\n result = rotl(v1, 1n)\n result = add(result, rotl(v2, 7n))\n result = add(result, rotl(v3, 12n))\n result = add(result, rotl(v4, 18n))\n\n v1 = multiply(rotl(multiply(v1, PRIME64_2), 31n), PRIME64_1)\n result = result ^ v1\n result = add(multiply(result, PRIME64_1), PRIME64_4)\n\n v2 = multiply(rotl(multiply(v2, PRIME64_2), 31n), PRIME64_1)\n result = result ^ v2\n result = add(multiply(result, PRIME64_1), PRIME64_4)\n\n v3 = multiply(rotl(multiply(v3, PRIME64_2), 31n), PRIME64_1)\n result = result ^ v3\n result = add(multiply(result, PRIME64_1), PRIME64_4)\n\n v4 = multiply(rotl(multiply(v4, PRIME64_2), 31n), PRIME64_1)\n result = result ^ v4\n result = add(multiply(result, PRIME64_1), PRIME64_4)\n } else {\n result = add(seed, PRIME64_5)\n }\n\n result = add(result, BigInt(totalLen))\n\n while (p <= memsize - 8) {\n let temp = bigintFromU16(\n (input[p + 1] << 8) | input[p],\n (input[p + 3] << 8) | input[p + 2],\n (input[p + 5] << 8) | input[p + 4],\n (input[p + 7] << 8) | input[p + 6],\n )\n temp = multiply(rotl(multiply(temp, PRIME64_2), 31n), PRIME64_1)\n result = add(multiply(rotl(result ^ temp, 27n), PRIME64_1), PRIME64_4)\n p += 8\n }\n\n if (p + 4 <= memsize) {\n let temp = multiply(\n bigintFromU16(\n (input[p + 1] << 8) | input[p],\n (input[p + 3] << 8) | input[p + 2],\n 0,\n 0,\n ),\n PRIME64_1,\n )\n\n result = add(multiply(rotl(result ^ temp, 23n), PRIME64_2), PRIME64_3)\n p += 4\n }\n\n while (p < memsize) {\n const temp = multiply(bigintFromU16(input[p++], 0, 0, 0), PRIME64_5)\n result = multiply(rotl(result ^ temp, 11n), PRIME64_1)\n }\n\n let temp = result >> 33n\n result = multiply(result ^ temp, PRIME64_2)\n\n temp = result >> 29n\n result = multiply(result ^ temp, PRIME64_3)\n\n temp = result >> 32n\n result ^= temp\n\n return 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