diff --git a/package-lock.json b/package-lock.json
index 0040561..99824b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
{
"name": "@okexchain/javascript-sdk",
- "version": "0.0.8",
+ "version": "0.0.27",
"lockfileVersion": 1,
"requires": true,
"dependencies": {
@@ -2090,6 +2090,11 @@
"integrity": "sha1-MnE7wCj3XAL9txDXx7zsHyxgcO8=",
"dev": true
},
+ "buffer-to-arraybuffer": {
+ "version": "0.0.5",
+ "resolved": "https://registry.npmjs.org/buffer-to-arraybuffer/-/buffer-to-arraybuffer-0.0.5.tgz",
+ "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo="
+ },
"buffer-xor": {
"version": "1.0.3",
"resolved": "http://registry.npm.taobao.org/buffer-xor/download/buffer-xor-1.0.3.tgz",
@@ -2799,8 +2804,15 @@
"decode-uri-component": {
"version": "0.2.0",
"resolved": "http://registry.npm.taobao.org/decode-uri-component/download/decode-uri-component-0.2.0.tgz",
- "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
- "dev": true
+ "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
+ },
+ "decompress-response": {
+ "version": "3.3.0",
+ "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
+ "integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
+ "requires": {
+ "mimic-response": "^1.0.0"
+ }
},
"deep-equal": {
"version": "1.0.1",
@@ -2983,6 +2995,11 @@
"esutils": "^2.0.2"
}
},
+ "dom-walk": {
+ "version": "0.1.2",
+ "resolved": "https://registry.npmjs.org/dom-walk/-/dom-walk-0.1.2.tgz",
+ "integrity": "sha512-6QvTW9mrGeIegrFXdtQi9pk7O/nSK6lSdXW2eqUspN5LWD7UTji2Fqw5V2YLjBpHEoU9Xl/eUWNpDeZvoyOv2w=="
+ },
"domain-browser": {
"version": "1.2.0",
"resolved": "http://registry.npm.taobao.org/domain-browser/download/domain-browser-1.2.0.tgz",
@@ -3282,6 +3299,40 @@
"integrity": "sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=",
"dev": true
},
+ "eth-lib": {
+ "version": "0.2.8",
+ "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.2.8.tgz",
+ "integrity": "sha512-ArJ7x1WcWOlSpzdoTBX8vkwlkSQ85CjjifSZtV4co64vWxSV8geWfPI9x4SVYu3DSxnX4yWFVTtGL+j9DUFLNw==",
+ "requires": {
+ "bn.js": "^4.11.6",
+ "elliptic": "^6.4.0",
+ "xhr-request-promise": "^0.1.2"
+ }
+ },
+ "ethereum-bloom-filters": {
+ "version": "1.0.9",
+ "resolved": "https://registry.npmjs.org/ethereum-bloom-filters/-/ethereum-bloom-filters-1.0.9.tgz",
+ "integrity": "sha512-GiK/RQkAkcVaEdxKVkPcG07PQ5vD7v2MFSHgZmBJSfMzNRHimntdBithsHAT89tAXnIpzVDWt8iaCD1DvkaxGg==",
+ "requires": {
+ "js-sha3": "^0.8.0"
+ }
+ },
+ "ethjs-unit": {
+ "version": "0.1.6",
+ "resolved": "https://registry.npmjs.org/ethjs-unit/-/ethjs-unit-0.1.6.tgz",
+ "integrity": "sha1-xmWSHkduh7ziqdWIpv4EBbLEFpk=",
+ "requires": {
+ "bn.js": "4.11.6",
+ "number-to-bn": "1.7.0"
+ },
+ "dependencies": {
+ "bn.js": {
+ "version": "4.11.6",
+ "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
+ "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
+ }
+ }
+ },
"eventemitter3": {
"version": "3.1.0",
"resolved": "http://registry.npm.taobao.org/eventemitter3/download/eventemitter3-3.1.0.tgz",
@@ -4441,6 +4492,15 @@
}
}
},
+ "global": {
+ "version": "4.4.0",
+ "resolved": "https://registry.npmjs.org/global/-/global-4.4.0.tgz",
+ "integrity": "sha512-wv/LAoHdRE3BeTGz53FAamhGlPLhlssK45usmGFThIi4XqnBmjKQ16u+RNbP7WvigRZDxUsM0J3gcQ5yicaL0w==",
+ "requires": {
+ "min-document": "^2.19.0",
+ "process": "^0.11.10"
+ }
+ },
"globals": {
"version": "11.11.0",
"resolved": "http://registry.npm.taobao.org/globals/download/globals-11.11.0.tgz",
@@ -5158,6 +5218,11 @@
"number-is-nan": "^1.0.0"
}
},
+ "is-function": {
+ "version": "1.0.2",
+ "resolved": "https://registry.npmjs.org/is-function/-/is-function-1.0.2.tgz",
+ "integrity": "sha512-lw7DUp0aWXYg+CBCN+JKkcE0Q2RayZnSvnZBlwgxHBQhqt5pZNVy4Ri7H9GmmXkdu7LUthszM+Tor1u/2iBcpQ=="
+ },
"is-generator-fn": {
"version": "1.0.0",
"resolved": "http://registry.npm.taobao.org/is-generator-fn/download/is-generator-fn-1.0.0.tgz",
@@ -5174,6 +5239,11 @@
"is-extglob": "^2.1.1"
}
},
+ "is-hex-prefixed": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/is-hex-prefixed/-/is-hex-prefixed-1.0.0.tgz",
+ "integrity": "sha1-fY035q135dEnFIkTxXPggtd39VQ="
+ },
"is-number": {
"version": "3.0.0",
"resolved": "http://registry.npm.taobao.org/is-number/download/is-number-3.0.0.tgz",
@@ -6483,6 +6553,11 @@
"integrity": "sha1-+IxgjjJKM3OpW8xFrTBeXJecRZs=",
"dev": true
},
+ "js-sha3": {
+ "version": "0.8.0",
+ "resolved": "https://registry.npmjs.org/js-sha3/-/js-sha3-0.8.0.tgz",
+ "integrity": "sha512-gF1cRrHhIzNfToc802P800N8PpXS+evLLXfsVpowqmAFR9uwbi89WvXg2QspOmXL8QL86J4T1EpFu+yUkwJY3Q=="
+ },
"js-tokens": {
"version": "4.0.0",
"resolved": "http://registry.npm.taobao.org/js-tokens/download/js-tokens-4.0.0.tgz",
@@ -7011,6 +7086,19 @@
"integrity": "sha1-ggyGo5M0ZA6ZUWkovQP8qIBX0CI=",
"dev": true
},
+ "mimic-response": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
+ "integrity": "sha512-j5EctnkH7amfV/q5Hgmoal1g2QHFJRraOtmx0JpIqkxhBhI/lJSl1nMpQ45hVarwNETOoWEimndZ4QK0RHxuxQ=="
+ },
+ "min-document": {
+ "version": "2.19.0",
+ "resolved": "https://registry.npmjs.org/min-document/-/min-document-2.19.0.tgz",
+ "integrity": "sha1-e9KC4/WELtKVu3SM3Z8f+iyCRoU=",
+ "requires": {
+ "dom-walk": "^0.1.0"
+ }
+ },
"minimalistic-assert": {
"version": "1.0.1",
"resolved": "http://registry.npm.taobao.org/minimalistic-assert/download/minimalistic-assert-1.0.1.tgz",
@@ -7244,6 +7332,22 @@
"integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
"dev": true
},
+ "number-to-bn": {
+ "version": "1.7.0",
+ "resolved": "https://registry.npmjs.org/number-to-bn/-/number-to-bn-1.7.0.tgz",
+ "integrity": "sha1-uzYjWS9+X54AMLGXe9QaDFP+HqA=",
+ "requires": {
+ "bn.js": "4.11.6",
+ "strip-hex-prefix": "1.0.0"
+ },
+ "dependencies": {
+ "bn.js": {
+ "version": "4.11.6",
+ "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
+ "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
+ }
+ }
+ },
"nwsapi": {
"version": "2.1.3",
"resolved": "http://registry.npm.taobao.org/nwsapi/download/nwsapi-2.1.3.tgz",
@@ -7259,8 +7363,7 @@
"object-assign": {
"version": "4.1.1",
"resolved": "http://registry.npm.taobao.org/object-assign/download/object-assign-4.1.1.tgz",
- "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=",
- "dev": true
+ "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
},
"object-copy": {
"version": "0.1.0",
@@ -7552,6 +7655,11 @@
}
}
},
+ "parse-headers": {
+ "version": "2.0.3",
+ "resolved": "https://registry.npmjs.org/parse-headers/-/parse-headers-2.0.3.tgz",
+ "integrity": "sha512-QhhZ+DCCit2Coi2vmAKbq5RGTRcQUOE2+REgv8vdyu7MnYx2eZztegqtTx99TZ86GTIwqiy3+4nQTWZ2tgmdCA=="
+ },
"parse-json": {
"version": "2.2.0",
"resolved": "http://registry.npm.taobao.org/parse-json/download/parse-json-2.2.0.tgz",
@@ -7769,8 +7877,7 @@
"process": {
"version": "0.11.10",
"resolved": "http://registry.npm.taobao.org/process/download/process-0.11.10.tgz",
- "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI=",
- "dev": true
+ "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI="
},
"process-nextick-args": {
"version": "2.0.0",
@@ -7858,6 +7965,16 @@
"integrity": "sha1-6eha2+ddoLvkyOBHaghikPhjtAQ=",
"dev": true
},
+ "query-string": {
+ "version": "5.1.1",
+ "resolved": "https://registry.npmjs.org/query-string/-/query-string-5.1.1.tgz",
+ "integrity": "sha512-gjWOsm2SoGlgLEdAGt7a6slVOk9mGiXmPFMqrEhLQ68rhQuBnpfs3+EmlvqKyxnCo9/PPlF+9MtY02S1aFg+Jw==",
+ "requires": {
+ "decode-uri-component": "^0.2.0",
+ "object-assign": "^4.1.0",
+ "strict-uri-encode": "^1.0.0"
+ }
+ },
"querystring": {
"version": "0.2.0",
"resolved": "http://registry.npm.taobao.org/querystring/download/querystring-0.2.0.tgz",
@@ -8468,6 +8585,11 @@
"resolved": "https://registry.npm.taobao.org/schema/download/schema-0.2.1.tgz",
"integrity": "sha1-uvNWiI+1H4nqIpao3h/lJ8VnvoQ="
},
+ "scrypt-js": {
+ "version": "3.0.1",
+ "resolved": "https://registry.npmjs.org/scrypt-js/-/scrypt-js-3.0.1.tgz",
+ "integrity": "sha512-cdwTTnqPu0Hyvf5in5asVdZocVDTNRmR7XEcJuIzMjJeSHybHl7vpB66AzwTaIg6CLSbtjcxc8fqcySfnTkccA=="
+ },
"secp256k1": {
"version": "4.0.2",
"resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-4.0.2.tgz",
@@ -8609,8 +8731,17 @@
"simple-concat": {
"version": "1.0.0",
"resolved": "http://registry.npm.taobao.org/simple-concat/download/simple-concat-1.0.0.tgz",
- "integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY=",
- "dev": true
+ "integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY="
+ },
+ "simple-get": {
+ "version": "2.8.1",
+ "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-2.8.1.tgz",
+ "integrity": "sha512-lSSHRSw3mQNUGPAYRqo7xy9dhKmxFXIjLjp4KHpf99GEH2VH7C3AM+Qfx6du6jhfUi6Vm7XnbEVEf7Wb6N8jRw==",
+ "requires": {
+ "decompress-response": "^3.3.0",
+ "once": "^1.3.1",
+ "simple-concat": "^1.0.0"
+ }
},
"sisteransi": {
"version": "0.1.1",
@@ -9000,6 +9131,11 @@
"integrity": "sha1-jcy7CskJMo64vI4qS9OTSv2vYGw=",
"dev": true
},
+ "strict-uri-encode": {
+ "version": "1.1.0",
+ "resolved": "https://registry.npmjs.org/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz",
+ "integrity": "sha1-J5siXfHVgrH1TmWt3UNS4Y+qBxM="
+ },
"string-length": {
"version": "2.0.0",
"resolved": "http://registry.npm.taobao.org/string-length/download/string-length-2.0.0.tgz",
@@ -9070,6 +9206,14 @@
"integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
"dev": true
},
+ "strip-hex-prefix": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/strip-hex-prefix/-/strip-hex-prefix-1.0.0.tgz",
+ "integrity": "sha1-DF8VX+8RUTczd96du1iNoFUA428=",
+ "requires": {
+ "is-hex-prefixed": "1.0.0"
+ }
+ },
"strip-json-comments": {
"version": "2.0.1",
"resolved": "http://registry.npm.taobao.org/strip-json-comments/download/strip-json-comments-2.0.1.tgz",
@@ -9330,6 +9474,11 @@
"xtend": "~4.0.1"
}
},
+ "timed-out": {
+ "version": "4.0.1",
+ "resolved": "https://registry.npmjs.org/timed-out/-/timed-out-4.0.1.tgz",
+ "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8="
+ },
"timers-browserify": {
"version": "1.4.2",
"resolved": "http://registry.npm.taobao.org/timers-browserify/download/timers-browserify-1.4.2.tgz",
@@ -9756,12 +9905,22 @@
"integrity": "sha1-WvIvGMBSoACkjXuCxenC4v7tpyg=",
"dev": true
},
+ "url-set-query": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/url-set-query/-/url-set-query-1.0.0.tgz",
+ "integrity": "sha1-AW6M/Xwg7gXK/neV6JK9BwL6ozk="
+ },
"use": {
"version": "3.1.1",
"resolved": "http://registry.npm.taobao.org/use/download/use-3.1.1.tgz",
"integrity": "sha1-1QyMrHmhn7wg8pEfVuuXP04QBw8=",
"dev": true
},
+ "utf8": {
+ "version": "3.0.0",
+ "resolved": "https://registry.npmjs.org/utf8/-/utf8-3.0.0.tgz",
+ "integrity": "sha512-E8VjFIQ/TyQgp+TZfS6l8yp/xWppSAHzidGiRrqe4bK4XP9pTRyKFgGJpO3SN7zdX4DeomTrwaseCHovfpFcqQ=="
+ },
"util": {
"version": "0.10.4",
"resolved": "http://registry.npm.taobao.org/util/download/util-0.10.4.tgz",
@@ -9866,6 +10025,33 @@
"minimist": "^1.2.0"
}
},
+ "web3-utils": {
+ "version": "1.3.1",
+ "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.3.1.tgz",
+ "integrity": "sha512-9gPwFm8SXtIJuzdrZ37PRlalu40fufXxo+H2PiCwaO6RpKGAvlUlWU0qQbyToFNXg7W2H8djEgoAVac8NLMCKQ==",
+ "requires": {
+ "bn.js": "^4.11.9",
+ "eth-lib": "0.2.8",
+ "ethereum-bloom-filters": "^1.0.6",
+ "ethjs-unit": "0.1.6",
+ "number-to-bn": "1.7.0",
+ "randombytes": "^2.1.0",
+ "underscore": "1.9.1",
+ "utf8": "3.0.0"
+ },
+ "dependencies": {
+ "bn.js": {
+ "version": "4.11.9",
+ "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.9.tgz",
+ "integrity": "sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw=="
+ },
+ "underscore": {
+ "version": "1.9.1",
+ "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.9.1.tgz",
+ "integrity": "sha512-5/4etnCkd9c8gwgowi5/om/mYO5ajCaOgdzj/oW+0eQV9WxKBDZw5+ycmKmeaTXjInS/W0BzpGLo2xR2aBwZdg=="
+ }
+ }
+ },
"webidl-conversions": {
"version": "4.0.2",
"resolved": "http://registry.npm.taobao.org/webidl-conversions/download/webidl-conversions-4.0.2.tgz",
@@ -10006,6 +10192,39 @@
"async-limiter": "~1.0.0"
}
},
+ "xhr": {
+ "version": "2.6.0",
+ "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.6.0.tgz",
+ "integrity": "sha512-/eCGLb5rxjx5e3mF1A7s+pLlR6CGyqWN91fv1JgER5mVWg1MZmlhBvy9kjcsOdRk8RrIujotWyJamfyrp+WIcA==",
+ "requires": {
+ "global": "~4.4.0",
+ "is-function": "^1.0.1",
+ "parse-headers": "^2.0.0",
+ "xtend": "^4.0.0"
+ }
+ },
+ "xhr-request": {
+ "version": "1.1.0",
+ "resolved": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.1.0.tgz",
+ "integrity": "sha512-Y7qzEaR3FDtL3fP30k9wO/e+FBnBByZeybKOhASsGP30NIkRAAkKD/sCnLvgEfAIEC1rcmK7YG8f4oEnIrrWzA==",
+ "requires": {
+ "buffer-to-arraybuffer": "^0.0.5",
+ "object-assign": "^4.1.1",
+ "query-string": "^5.0.1",
+ "simple-get": "^2.7.0",
+ "timed-out": "^4.0.1",
+ "url-set-query": "^1.0.0",
+ "xhr": "^2.0.4"
+ }
+ },
+ "xhr-request-promise": {
+ "version": "0.1.3",
+ "resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.3.tgz",
+ "integrity": "sha512-YUBytBsuwgitWtdRzXDDkWAXzhdGB8bYm0sSzMPZT7Z2MBjMSTHFsyCT1yCRATY+XC69DUrQraRAEgcoCRaIPg==",
+ "requires": {
+ "xhr-request": "^1.1.0"
+ }
+ },
"xml-name-validator": {
"version": "3.0.0",
"resolved": "http://registry.npm.taobao.org/xml-name-validator/download/xml-name-validator-3.0.0.tgz",
diff --git a/package.json b/package.json
index ffddb96..1bd1009 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,9 @@
"url": "^0.11.0",
"uuid": "^3.3.2",
"varstruct": "^6.1.2",
- "websocket-stream": "^5.5.0"
+ "websocket-stream": "^5.5.0",
+ "scrypt-js": "^3.0.1",
+ "web3-utils": "1.3.1"
},
"devDependencies": {
"@babel/cli": "^7.1.5",
diff --git a/src/crypto/index.js b/src/crypto/index.js
index 19fc03d..4a0a8f6 100644
--- a/src/crypto/index.js
+++ b/src/crypto/index.js
@@ -17,6 +17,9 @@ import RIPEMD160 from "crypto-js/ripemd160"
import { Buffer } from "buffer"
import secp256k1 from "secp256k1"
import createKeccakHash from "keccak"
+import SHA3 from "crypto-js/sha3"
+import scrypt from "scrypt-js"
+var utils = require('web3-utils');
// 浏览器端实现
const sync = require('./scrypt-sync')
@@ -195,51 +198,51 @@ export const validateSig = (sigHex, msgHex, pubKeyHex) => {
* @returns {object}
*/
export const generateKeyStore = (privateKeyHex, password) => {
- const salt = cryp.randomBytes(32)
- const iv = cryp.randomBytes(16)
- const cipherAlg = "aes-128-ctr"
+ var salt = cryp.randomBytes(32);
+ var iv = cryp.randomBytes(16);
- const kdf = "scrypt"
- const kdfparams = {
+ var derivedKey;
+ var kdf = 'scrypt';
+ var kdfparams = {
dklen: 32,
- salt: salt.toString("hex"),
- n: 262144,
- p: 1,
- r: 8,
- //prf: "hmac-sha256"
- }
- const options = {
- N: kdfparams.n,
- r: kdfparams.r,
- p: kdfparams.p,
- maxmem: 1024*1024*1024*2,
- }
+ salt: salt.toString('hex')
+ };
- const derivedKey = sync(Buffer.from(password),salt,kdfparams.dklen,options)
- const cipher = cryp.createCipheriv(cipherAlg, derivedKey.slice(0, 16), iv)
+ // FIXME: support progress reporting callback
+ kdfparams.n = 8192; // 2048 4096 8192 16384
+ kdfparams.r = 8;
+ kdfparams.p = 1;
+ derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
+
+ var cipher = cryp.createCipheriv('aes-128-ctr', derivedKey.slice(0, 16), iv);
if (!cipher) {
- throw new Error("createCipheriv has been failed")
+ throw new Error('Unsupported cipher');
}
- const ciphertext = Buffer.concat([cipher.update(Buffer.from(privateKeyHex.toLowerCase(), "hex")), cipher.final()])
- const bufferValue = Buffer.concat([derivedKey.slice(16, 32), Buffer.from(ciphertext, "hex")])
+ var ciphertext = Buffer.from([
+ ...cipher.update(Buffer.from(privateKeyHex.replace('0x', ''), 'hex')),
+ ...cipher.final()]
+ );
+
+ var mac = utils.sha3(Buffer.from([...derivedKey.slice(16, 32), ...ciphertext])).replace('0x', '');
+
return {
+ version: 3,
+ id: uuid.v4({random: cryp.randomBytes(16)}),
+ // address: account.address.toLowerCase().replace('0x', ''),
crypto: {
- ciphertext: ciphertext.toString("hex"),
+ ciphertext: ciphertext.toString('hex'),
cipherparams: {
- iv: iv.toString("hex")
+ iv: iv.toString('hex')
},
- cipher: cipherAlg,
- kdf,
+ cipher: 'aes-128-ctr',
+ kdf: kdf,
kdfparams: kdfparams,
- mac: sha256(bufferValue.toString("hex"))
- },
- id: uuid.v4({
- random: cryp.randomBytes(16)
- }),
- version: 3,
- }
+ mac: mac.toString('hex')
+ }
+ };
}
+
/**
* Get privateKey from keyStore.
* @param {string | object} keystore
@@ -326,5 +329,4 @@ export const sha256 = (hex) => {
if (hex.length % 2 !== 0) throw new Error(`invalid hex string length: ${hex}`)
const hexEncoded = hexEncoding.parse(hex)
return SHA256(hexEncoded).toString()
-}
-
+}
\ No newline at end of file