1.首先编译脚本是:
const fs = require('fs');
const solc = require('solc');
const path = require('path');
const contractPath = path.resolve(__dirname,'../contracts','Voting.sol');
const contractSource = fs.readFileSync(contractPath,'utf-8');
let compileResult = solc.compile(contractSource);
console.log(compileResult);
~
此时输出 compileResult会报错:
‘{“errors”:[{“component”:“general”,“formattedMessage”:"* Line 1, Column 2\n Syntax error: value, object or array expected.\n* Line 1, Column 3\n Extra non-whitespace after JSON value.\n",“message”:"* Line 1, Column 2\n Syntax error: value, object or array expected.\n* Line 1, Column 3\n Extra non-whitespace after JSON value.\n",“severity”:“error”,“type”:“JSONError”}]}’
应将:
let compileResult = solc.compile(contractSource);
改为:
let compileResult = solc.compile(contractSource,1);
1代表:打开solc工具里面的优化器
然后继续编译输出comileResult时候又报错:
Uncaught AssertionError [ERR_ASSERTION]: Invalid callback object specified.
at runWithCallbacks (/simple_voting_dapp/node_modules/solc/wrapper.js:97:7)
at compileStandard (/simple_voting_dapp/node_modules/solc/wrapper.js:207:14)
at Object.compileStandardWrapper [as compile] (/simple_voting_dapp/node_modules/solc/wrapper.js:214:14)
at repl:1:25
at Script.runInThisContext (vm.js:120:20)
at REPLServer.defaultEval (repl.js:433:29)
at bound (domain.js:426:14)
at REPLServer.runBound [as eval] (domain.js:439:12)
at REPLServer.onLine (repl.js:760:10)
at REPLServer.emit (events.js:327:22)
at REPLServer.EventEmitter.emit (domain.js:482:12)
at REPLServer.Interface._onLine (readline.js:329:10)
at REPLServer.Interface._line (readline.js:658:8)
at REPLServer.Interface._ttyWrite (readline.js:999:14)
at REPLServer.self._ttyWrite (repl.js:851:9)
at ReadStream.onkeypress (readline.js:205:10) {
generatedMessage: false,
code: 'ERR_ASSERTION',
actual: false,
expected: true,
operator: '=='
}
- 查询了资料说solidity合约的编译版本要和solc编译版本一致,我试了一试 ,将solc版本改为0.4.22,同时将solidity版本改为>=0.4.22 <0.7.0 ,最后编译通过了,得到了compileResult.
但是此方法终究治标不治本啊,对于新版本的solc和solidity的编译版本如何是好?
正确的解决办法:
也可以查看:ethereum/solc-js: Javascript bindings for the Solidity compiler (github.com)https://github.com/ethereum/solc-js#readme
将编译的脚本改为:文章来源:https://www.toymoban.com/news/detail-694908.html
const fs = require('fs');
const solc = require('solc');
const path = require('path');
const contractPath = path.resolve(__dirname,'../contracts','Voting.sol');
const contractSource = fs.readFileSync(contractPath,'utf-8');
var input = {
language: 'Solidity',
sources: {
'Voting.sol': {
content: contractSource
}
},
settings: {
outputSelection: {
'*': {
'*': ['*']
}
}
}
};
var compileResult = JSON.parse(solc.compile(JSON.stringify(input)));
console.log(compileResult);
最终成功!!!文章来源地址https://www.toymoban.com/news/detail-694908.html
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