使用 solana/web3.js ,开发uni app, 但是提示 crypto.getRandomValues must be defined
jq6vz3qz1#
可以试试我的这个解决办法,通过打补丁的方式,我参考的是之前的uni-app源码的提交记录,但是他们新版又给去除了。只能支持 crypto.getRandomValues 和 crypto.randomBytes 方法,如果你的第三方库用到crypto其他方法,那只能自己去实现了。web3 的这些sdk底层都要获取随机数,应该都用了这一套,所以其他币也是同样解决办法。
crypto.getRandomValues
crypto.randomBytes
提交记录参考: feat(app-plus): add crypto
crypto.ts 文件内容:
const lookup = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 62, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 63, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, ] function base64Decode(source: string, target: Uint8Array) { const sourceLength = source.length const paddingLength = source[sourceLength - 2] === '=' ? 2 : source[sourceLength - 1] === '=' ? 1 : 0 let tmp let byteIndex = 0 const baseLength = (sourceLength - paddingLength) & 0xfffffffc for (var i = 0; i < baseLength; i += 4) { tmp = (lookup[source.charCodeAt(i)] << 18) | (lookup[source.charCodeAt(i + 1)] << 12) | (lookup[source.charCodeAt(i + 2)] << 6) | lookup[source.charCodeAt(i + 3)] target[byteIndex++] = (tmp >> 16) & 0xff target[byteIndex++] = (tmp >> 8) & 0xff target[byteIndex++] = tmp & 0xff } if (paddingLength === 1) { tmp = (lookup[source.charCodeAt(i)] << 10) | (lookup[source.charCodeAt(i + 1)] << 4) | (lookup[source.charCodeAt(i + 2)] >> 2) target[byteIndex++] = (tmp >> 8) & 0xff target[byteIndex++] = tmp & 0xff } if (paddingLength === 2) { tmp = (lookup[source.charCodeAt(i)] << 2) | (lookup[source.charCodeAt(i + 1)] >> 4) target[byteIndex++] = tmp & 0xff } } export default { getRandomValues(arr: { byteLength: number | undefined buffer: ArrayBufferLike byteOffset: number | undefined }) { if ( !( arr instanceof Int8Array || arr instanceof Uint8Array || arr instanceof Int16Array || arr instanceof Uint16Array || arr instanceof Int32Array || arr instanceof Uint32Array || arr instanceof Uint8ClampedArray ) ) { throw new Error('Expected an integer array') } if (arr.byteLength > 65536) { throw new Error('Can only request a maximum of 65536 bytes') } var crypto = uni.requireNativePlugin('DCloud-Crypto') base64Decode( crypto.getRandomValues(arr.byteLength), new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength), ) return arr }, randomBytes(arrSize: number) { if (arrSize > 65536) { throw new Error('Can only request a maximum of 65536 bytes') } var crypto = uni.requireNativePlugin('DCloud-Crypto') var arr = new Uint8Array(arrSize) base64Decode( crypto.getRandomValues(arr.byteLength), new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength), ) return arr }, }
index.ts 文件内容
import crypto from "./crypto"; /** * 全局内置类型替换 */ (function (scope) { 'use strict'; if(!(scope as any).crypto){ (scope as any).crypto = crypto console.log('crypto不存在, 使用自定义crypto进行替换') } })(typeof globalThis !== 'undefined'? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : this) console.log('crypto polyfill loaded for App environment.')
1条答案
按热度按时间jq6vz3qz1#
可以试试我的这个解决办法,通过打补丁的方式,我参考的是之前的uni-app源码的提交记录,但是他们新版又给去除了。只能支持
crypto.getRandomValues
和crypto.randomBytes
方法,如果你的第三方库用到crypto其他方法,那只能自己去实现了。web3 的这些sdk底层都要获取随机数,应该都用了这一套,所以其他币也是同样解决办法。
提交记录参考: feat(app-plus): add crypto
crypto.ts 文件内容:
index.ts 文件内容