openethereum/js/packages/shared/util/solidity.js

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import solc from 'solc/browser-wrapper';
export default class SolidityUtils {
static compile (data, compiler) {
const { sourcecode, build, optimize, files, name = '' } = data;
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const start = Date.now();
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console.log('[solidity] compiling...');
const input = {
[ name ]: sourcecode
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};
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const findFiles = (path) => {
const file = files.find((f) => f.name === path);
if (file) {
return { contents: file.sourcecode };
} else {
return { error: 'File not found' };
}
};
const compiled = compiler.compile({ sources: input }, optimize ? 1 : 0, findFiles);
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const time = Math.round((Date.now() - start) / 100) / 10;
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console.log(`[solidity] done compiling in ${time}s`);
compiled.version = build.longVersion;
compiled.sourcecode = sourcecode;
return compiled;
}
static getCompiler (build) {
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const { longVersion, path } = build;
const URL = `https://cdn.rawgit.com/ethereum/solc-bin/gh-pages/bin/${path}`;
const isWorker = typeof window !== 'object';
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return fetch(URL)
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.then((r) => r.text())
.then((code) => {
// `window` for main thread, `self` for workers
const _self = isWorker ? self : window;
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_self.Module = {};
const solcCode = code.replace('var Module;', `var Module=${isWorker ? 'self' : 'window'}.Module;`);
console.log(`[solidity] evaluating ${longVersion}`);
try {
// eslint-disable-next-line no-eval
eval(solcCode);
} catch (e) {
return Promise.reject(e);
}
console.log(`[solidity] done evaluating ${longVersion}`);
const compiler = solc(_self.Module);
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delete _self.Module;
return compiler;
});
}
}