aboutsummaryrefslogtreecommitdiffstats
path: root/packages/deployer/src/compiler.ts
blob: 712169c8931fac141f6d3c974b1a1cca5cf45521 (plain) (blame)
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
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
import { logUtils, promisify } from '@0xproject/utils';
import * as ethUtil from 'ethereumjs-util';
import * as fs from 'fs';
import 'isomorphic-fetch';
import * as _ from 'lodash';
import * as path from 'path';
import * as requireFromString from 'require-from-string';
import * as semver from 'semver';
import solc = require('solc');
import * as Web3 from 'web3';

import { binPaths } from './solc/bin_paths';
import {
    createArtifactsDirIfDoesNotExistAsync,
    findImportIfExist,
    getContractArtifactIfExistsAsync,
    getNormalizedErrMsg,
    parseDependencies,
    parseSolidityVersionRange,
} from './utils/compiler';
import { constants } from './utils/constants';
import { fsWrapper } from './utils/fs_wrapper';
import {
    CompilerOptions,
    ContractArtifact,
    ContractNetworkData,
    ContractNetworks,
    ContractSourceData,
    ContractSources,
    ContractSpecificSourceData,
} from './utils/types';
import { utils } from './utils/utils';

const ALL_CONTRACTS_IDENTIFIER = '*';

export class Compiler {
    private _contractsDir: string;
    private _networkId: number;
    private _optimizerEnabled: boolean;
    private _artifactsDir: string;
    // This get's set in the beggining of `compileAsync` function. It's not called from a constructor, but it's the only public method of that class and could as well be.
    private _contractSources!: ContractSources;
    private _solcErrors: Set<string> = new Set();
    private _specifiedContracts: Set<string> = new Set();
    private _contractSourceData: ContractSourceData = {};
    /**
     * Recursively retrieves Solidity source code from directory.
     * @param  dirPath Directory to search.
     * @return Mapping of contract fileName to contract source.
     */
    private static async _getContractSourcesAsync(dirPath: string): Promise<ContractSources> {
        let dirContents: string[] = [];
        try {
            dirContents = await fsWrapper.readdirAsync(dirPath);
        } catch (err) {
            throw new Error(`No directory found at ${dirPath}`);
        }
        let sources: ContractSources = {};
        for (const fileName of dirContents) {
            const contentPath = `${dirPath}/${fileName}`;
            if (path.extname(fileName) === constants.SOLIDITY_FILE_EXTENSION) {
                try {
                    const opts = {
                        encoding: 'utf8',
                    };
                    const source = await fsWrapper.readFileAsync(contentPath, opts);
                    sources[fileName] = source;
                    logUtils.log(`Reading ${fileName} source...`);
                } catch (err) {
                    logUtils.log(`Could not find file at ${contentPath}`);
                }
            } else {
                try {
                    const nestedSources = await Compiler._getContractSourcesAsync(contentPath);
                    sources = {
                        ...sources,
                        ...nestedSources,
                    };
                } catch (err) {
                    logUtils.log(`${contentPath} is not a directory or ${constants.SOLIDITY_FILE_EXTENSION} file`);
                }
            }
        }
        return sources;
    }
    /**
     * Instantiates a new instance of the Compiler class.
     * @param opts Options specifying directories, network, and optimization settings.
     * @return An instance of the Compiler class.
     */
    constructor(opts: CompilerOptions) {
        this._contractsDir = opts.contractsDir;
        this._networkId = opts.networkId;
        this._optimizerEnabled = opts.optimizerEnabled;
        this._artifactsDir = opts.artifactsDir;
        this._specifiedContracts = opts.specifiedContracts;
    }
    /**
     * Compiles selected Solidity files and writes JSON artifacts to artifactsDir.
     */
    public async compileAsync(): Promise<void> {
        await createArtifactsDirIfDoesNotExistAsync(this._artifactsDir);
        this._contractSources = await Compiler._getContractSourcesAsync(this._contractsDir);
        _.forIn(this._contractSources, this._setContractSpecificSourceData.bind(this));
        const fileNames = this._specifiedContracts.has(ALL_CONTRACTS_IDENTIFIER)
            ? _.keys(this._contractSources)
            : Array.from(this._specifiedContracts.values());
        for (const fileName of fileNames) {
            await this._compileContractAsync(fileName);
        }
        this._solcErrors.forEach(errMsg => {
            logUtils.log(errMsg);
        });
    }
    /**
     * Compiles contract and saves artifact to artifactsDir.
     * @param fileName Name of contract with '.sol' extension.
     */
    private async _compileContractAsync(fileName: string): Promise<void> {
        if (_.isUndefined(this._contractSources)) {
            throw new Error('Contract sources not yet initialized');
        }
        const contractSpecificSourceData = this._contractSourceData[fileName];
        const currentArtifactIfExists = await getContractArtifactIfExistsAsync(this._artifactsDir, fileName);
        const sourceHash = `0x${contractSpecificSourceData.sourceHash.toString('hex')}`;
        const sourceTreeHash = `0x${contractSpecificSourceData.sourceTreeHash.toString('hex')}`;

        let shouldCompile = false;
        if (_.isUndefined(currentArtifactIfExists)) {
            shouldCompile = true;
        } else {
            const currentArtifact = currentArtifactIfExists as ContractArtifact;
            shouldCompile =
                currentArtifact.networks[this._networkId].optimizer_enabled !== this._optimizerEnabled ||
                currentArtifact.networks[this._networkId].source_tree_hash !== sourceTreeHash;
        }
        if (!shouldCompile) {
            return;
        }
        const availableCompilerVersions = _.keys(binPaths);
        const solcVersion = semver.maxSatisfying(
            availableCompilerVersions,
            contractSpecificSourceData.solcVersionRange,
        );
        const fullSolcVersion = binPaths[solcVersion];
        const compilerBinFilename = path.join(__dirname, '../../solc_bin', fullSolcVersion);
        let solcjs: string;
        const isCompilerAvailableLocally = fs.existsSync(compilerBinFilename);
        if (isCompilerAvailableLocally) {
            solcjs = fs.readFileSync(compilerBinFilename).toString();
        } else {
            logUtils.log(`Downloading ${fullSolcVersion}...`);
            const url = `${constants.BASE_COMPILER_URL}${fullSolcVersion}`;
            const response = await fetch(url);
            if (response.status !== 200) {
                throw new Error(`Failed to load ${fullSolcVersion}`);
            }
            solcjs = await response.text();
            fs.writeFileSync(compilerBinFilename, solcjs);
        }
        const solcInstance = solc.setupMethods(requireFromString(solcjs, compilerBinFilename));

        logUtils.log(`Compiling ${fileName} with Solidity v${solcVersion}...`);
        const source = this._contractSources[fileName];
        const input = {
            [fileName]: source,
        };
        const sourcesToCompile = {
            sources: input,
        };
        const compiled = solcInstance.compile(sourcesToCompile, Number(this._optimizerEnabled), importPath =>
            findImportIfExist(this._contractSources, importPath),
        );

        if (!_.isUndefined(compiled.errors)) {
            _.forEach(compiled.errors, errMsg => {
                const normalizedErrMsg = getNormalizedErrMsg(errMsg);
                this._solcErrors.add(normalizedErrMsg);
            });
        }
        const contractName = path.basename(fileName, constants.SOLIDITY_FILE_EXTENSION);
        const contractIdentifier = `${fileName}:${contractName}`;
        if (_.isUndefined(compiled.contracts[contractIdentifier])) {
            throw new Error(
                `Contract ${contractName} not found in ${fileName}. Please make sure your contract has the same name as it's file name`,
            );
        }
        const abi: Web3.ContractAbi = JSON.parse(compiled.contracts[contractIdentifier].interface);
        const bytecode = `0x${compiled.contracts[contractIdentifier].bytecode}`;
        const runtimeBytecode = `0x${compiled.contracts[contractIdentifier].runtimeBytecode}`;
        const sourceMap = compiled.contracts[contractIdentifier].srcmap;
        const sourceMapRuntime = compiled.contracts[contractIdentifier].srcmapRuntime;
        const sources = _.keys(compiled.sources);
        const updated_at = Date.now();
        const contractNetworkData: ContractNetworkData = {
            solc_version: solcVersion,
            keccak256: sourceHash,
            source_tree_hash: sourceTreeHash,
            optimizer_enabled: this._optimizerEnabled,
            abi,
            bytecode,
            runtime_bytecode: runtimeBytecode,
            updated_at,
            source_map: sourceMap,
            source_map_runtime: sourceMapRuntime,
            sources,
        };

        let newArtifact: ContractArtifact;
        if (!_.isUndefined(currentArtifactIfExists)) {
            const currentArtifact = currentArtifactIfExists as ContractArtifact;
            newArtifact = {
                ...currentArtifact,
                networks: {
                    ...currentArtifact.networks,
                    [this._networkId]: contractNetworkData,
                },
            };
        } else {
            newArtifact = {
                contract_name: contractName,
                networks: {
                    [this._networkId]: contractNetworkData,
                },
            };
        }

        const artifactString = utils.stringifyWithFormatting(newArtifact);
        const currentArtifactPath = `${this._artifactsDir}/${contractName}.json`;
        await fsWrapper.writeFileAsync(currentArtifactPath, artifactString);
        logUtils.log(`${fileName} artifact saved!`);
    }
    /**
     * Gets contract dependendencies and keccak256 hash from source.
     * @param source Source code of contract.
     * @return Object with contract dependencies and keccak256 hash of source.
     */
    private _setContractSpecificSourceData(source: string, fileName: string): void {
        if (!_.isUndefined(this._contractSourceData[fileName])) {
            return;
        }
        const sourceHash = ethUtil.sha3(source);
        const solcVersionRange = parseSolidityVersionRange(source);
        const dependencies = parseDependencies(source);
        const sourceTreeHash = this._getSourceTreeHash(fileName, sourceHash, dependencies);
        this._contractSourceData[fileName] = {
            dependencies,
            solcVersionRange,
            sourceHash,
            sourceTreeHash,
        };
    }
    /**
     * Gets the source tree hash for a file and its dependencies.
     * @param fileName Name of contract file.
     */
    private _getSourceTreeHash(fileName: string, sourceHash: Buffer, dependencies: string[]): Buffer {
        if (dependencies.length === 0) {
            return sourceHash;
        } else {
            const dependencySourceTreeHashes = _.map(dependencies, dependency => {
                const source = this._contractSources[dependency];
                this._setContractSpecificSourceData(source, dependency);
                const sourceData = this._contractSourceData[dependency];
                return this._getSourceTreeHash(dependency, sourceData.sourceHash, sourceData.dependencies);
            });
            const sourceTreeHashesBuffer = Buffer.concat([sourceHash, ...dependencySourceTreeHashes]);
            const sourceTreeHash = ethUtil.sha3(sourceTreeHashesBuffer);
            return sourceTreeHash;
        }
    }
}