solidity-shell/src/compiler/remoteCompiler.js

An interactive Solidity shell with lightweight session recording and remote compiler support

'use strict'
/**
 * @author github.com/tintinweb
 * @license MIT
 * */
/** IMPORT */
const { solcVersions } = require('./autogenerated/solcVersions.js')
const { generateSolidity } = require('abi-to-sol')
const request = require('request');

function normalizeSolcVersion(version) {
    return version.replace('soljson-', '').replace('.js', '');
}

function getSolcJsCompilerList(options) {
    options = options || {};
    return new Promise((resolve, reject) => {
        request.get('https://solc-bin.ethereum.org/bin/list.json', (err, res, body) => {
            if (err) {
                return reject(err)
            } else {
                let data = JSON.parse(body);
                let releases = Object.values(data.releases)

                if (options.nightly) {
                    releases = Array.from(new Set([...releases, ...data.builds.map(b => b.path)]));
                }
                return resolve(releases.map(normalizeSolcVersion))
            }
        })
    });
}

function getRemoteCompiler(solidityVersion) {
    return new Promise((resolve, reject) => {

        //check if version is in static list (avoid http requests)
        let remoteSolidityVersion = solcVersions.find(
            (e) => !e.includes('nightly') && e.includes(`v${solidityVersion}`)
        )

        if (remoteSolidityVersion) {
            return resolve(remoteSolidityVersion);
        }
        //download remote compiler list and check again.
        getSolcJsCompilerList().then(solcJsCompilerList => {
            let found = solcJsCompilerList.find(
                (e) => !e.includes('nightly') && e.includes(`v${solidityVersion}`)
            )
            if (found) {
                return resolve(found);
            }
            return reject(new Error(`No compiler found for version ${solidityVersion}`));
        })

    });
}

//.import interface 0x40cfee8d71d67108db46f772b7e2cd55813bf2fb test2
function getRemoteInterfaceFromEtherscan(address, name, chain, solidityVersion, apikey) {
    return new Promise((resolve, reject) => {
        
        let provider = `https://api${(!chain || chain == "mainnet") ? "" : `-${chain}`}.etherscan.io`
        let url = `${provider}/api?module=contract&action=getabi&address=${address}&apikey=${apikey || 'YourApiKeyToken'}`;
        request.get(url, (err, res, body) => {
            if (err) {
                return reject(err)
            } else {
                let data = JSON.parse(body);
                if (!data.status || data.status != "1" || !data.result) {
                    return reject(data)
                }
                let abi = JSON.parse(data.result);
                let src = generateSolidity({
                    name: name,
                    solidityVersion: solidityVersion,
                    abi,
                    outputSource: false,
                });
                src = src.substring(src.indexOf("\n\n") + 2);  // strip license/pragma
                return resolve(src)
            }
        })
    });
}

module.exports = {
    getRemoteCompiler,
    getSolcJsCompilerList,
    getRemoteInterfaceFromEtherscan
}