├── .eslintrc.json ├── .gitignore ├── .prettierrc.json ├── abi.js ├── balances.js ├── config.js ├── contract.js ├── events ├── block-by-block.js ├── block-reader.js ├── blockchain.js └── last-downloaded-block.js ├── export.js ├── file-helper.js ├── index.js ├── package-lock.json ├── package.json ├── parameters.js ├── readme.md └── wallet-type.js /.eslintrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "parserOptions": { 3 | "ecmaVersion": 2018, 4 | "ecmaFeatures": { 5 | "jsx": true 6 | } 7 | }, 8 | "env": { 9 | "es6": true, 10 | "node": true 11 | }, 12 | "globals": { 13 | "document": false, 14 | "navigator": false, 15 | "window": false 16 | }, 17 | "rules": { 18 | "linebreak-style": ["error", "unix"], 19 | "consistent-this": "warn", 20 | "class-methods-use-this": "warn", 21 | "no-console": "off", 22 | "no-else-return": "warn", 23 | "no-invalid-this": "warn", 24 | "semi": [1, "always"], 25 | "accessor-pairs": "error", 26 | "arrow-spacing": [ 27 | "error", 28 | { 29 | "before": true, 30 | "after": true 31 | } 32 | ], 33 | "block-spacing": ["error", "always"], 34 | "brace-style": [ 35 | "error", 36 | "1tbs", 37 | { 38 | "allowSingleLine": true 39 | } 40 | ], 41 | "camelcase": [ 42 | "error", 43 | { 44 | "properties": "never" 45 | } 46 | ], 47 | "comma-dangle": [ 48 | "error", 49 | { 50 | "arrays": "never", 51 | "objects": "never", 52 | "imports": "never", 53 | "exports": "never", 54 | "functions": "never" 55 | } 56 | ], 57 | "comma-spacing": [ 58 | "error", 59 | { 60 | "before": false, 61 | "after": true 62 | } 63 | ], 64 | "comma-style": ["error", "last"], 65 | "constructor-super": "error", 66 | "curly": ["error", "multi-line"], 67 | "dot-location": ["error", "property"], 68 | "func-call-spacing": ["error", "never"], 69 | "generator-star-spacing": [ 70 | "error", 71 | { 72 | "before": true, 73 | "after": true 74 | } 75 | ], 76 | "handle-callback-err": ["error", "^(err|error)$"], 77 | "indent": [ 78 | "error", 79 | 2, 80 | { 81 | "SwitchCase": 1, 82 | "VariableDeclarator": 1, 83 | "outerIIFEBody": 1, 84 | "MemberExpression": 1, 85 | "FunctionDeclaration": { 86 | "parameters": 1, 87 | "body": 1 88 | }, 89 | "FunctionExpression": { 90 | "parameters": 1, 91 | "body": 1 92 | }, 93 | "CallExpression": { 94 | "arguments": 1 95 | }, 96 | "ArrayExpression": 1, 97 | "ObjectExpression": 1, 98 | "ImportDeclaration": 1, 99 | "flatTernaryExpressions": false, 100 | "ignoreComments": false 101 | } 102 | ], 103 | "key-spacing": [ 104 | "error", 105 | { 106 | "beforeColon": false, 107 | "afterColon": true 108 | } 109 | ], 110 | "keyword-spacing": [ 111 | "error", 112 | { 113 | "before": true, 114 | "after": true, 115 | "overrides": { 116 | "return": { 117 | "after": true 118 | }, 119 | "for": { 120 | "after": true 121 | } 122 | } 123 | } 124 | ], 125 | "new-cap": [ 126 | "error", 127 | { 128 | "newIsCap": true, 129 | "capIsNew": false 130 | } 131 | ], 132 | "new-parens": "error", 133 | "no-array-constructor": "error", 134 | "no-caller": "error", 135 | "no-class-assign": "error", 136 | "no-compare-neg-zero": "error", 137 | "no-cond-assign": "error", 138 | "no-const-assign": "error", 139 | "no-constant-condition": [ 140 | "error", 141 | { 142 | "checkLoops": false 143 | } 144 | ], 145 | "no-control-regex": "error", 146 | "no-debugger": "error", 147 | "no-delete-var": "error", 148 | "no-dupe-args": "error", 149 | "no-dupe-class-members": "error", 150 | "no-dupe-keys": "error", 151 | "no-duplicate-case": "error", 152 | "no-empty-character-class": "error", 153 | "no-empty-pattern": "error", 154 | "no-eval": "error", 155 | "no-ex-assign": "error", 156 | "no-extend-native": "error", 157 | "no-extra-bind": "error", 158 | "no-extra-boolean-cast": "error", 159 | "no-extra-parens": ["error", "functions"], 160 | "no-fallthrough": "error", 161 | "no-floating-decimal": "error", 162 | "no-func-assign": "error", 163 | "no-global-assign": "error", 164 | "no-implied-eval": "error", 165 | "no-inner-declarations": ["error", "functions"], 166 | "no-invalid-regexp": "error", 167 | "no-irregular-whitespace": "error", 168 | "no-iterator": "error", 169 | "no-label-var": "error", 170 | "no-labels": [ 171 | "error", 172 | { 173 | "allowLoop": false, 174 | "allowSwitch": false 175 | } 176 | ], 177 | "no-lone-blocks": "error", 178 | "no-mixed-operators": [ 179 | "error", 180 | { 181 | "groups": [["==", "!=", "===", "!==", ">", ">=", "<", "<="], ["&&", "||"], ["in", "instanceof"]], 182 | "allowSamePrecedence": true 183 | } 184 | ], 185 | "no-mixed-spaces-and-tabs": "error", 186 | "no-multi-spaces": "error", 187 | "no-multi-str": "error", 188 | "no-multiple-empty-lines": [ 189 | "error", 190 | { 191 | "max": 1, 192 | "maxEOF": 0 193 | } 194 | ], 195 | "no-negated-in-lhs": "error", 196 | "no-new": "error", 197 | "no-new-func": "error", 198 | "no-new-object": "error", 199 | "no-new-require": "error", 200 | "no-new-symbol": "error", 201 | "no-new-wrappers": "error", 202 | "no-obj-calls": "error", 203 | "no-octal": "error", 204 | "no-octal-escape": "error", 205 | "no-path-concat": "error", 206 | "no-proto": "error", 207 | "no-redeclare": "error", 208 | "no-regex-spaces": "error", 209 | "no-return-assign": ["error", "except-parens"], 210 | "no-return-await": "error", 211 | "no-self-assign": "error", 212 | "no-self-compare": "error", 213 | "no-sequences": "error", 214 | "no-shadow-restricted-names": "error", 215 | "no-sparse-arrays": "error", 216 | "no-tabs": "error", 217 | "no-template-curly-in-string": "error", 218 | "no-this-before-super": "error", 219 | "no-throw-literal": "error", 220 | "no-trailing-spaces": "error", 221 | "no-undef": "error", 222 | "no-undef-init": "error", 223 | "no-unexpected-multiline": "error", 224 | "no-unmodified-loop-condition": "error", 225 | "no-unneeded-ternary": [ 226 | "error", 227 | { 228 | "defaultAssignment": false 229 | } 230 | ], 231 | "no-unreachable": "error", 232 | "no-unsafe-finally": "error", 233 | "no-unsafe-negation": "error", 234 | "no-unused-expressions": [ 235 | "error", 236 | { 237 | "allowShortCircuit": true, 238 | "allowTernary": true, 239 | "allowTaggedTemplates": true 240 | } 241 | ], 242 | "no-unused-vars": [ 243 | "error", 244 | { 245 | "vars": "all", 246 | "args": "none", 247 | "ignoreRestSiblings": true 248 | } 249 | ], 250 | "no-use-before-define": [ 251 | "error", 252 | { 253 | "functions": false, 254 | "classes": false, 255 | "variables": false 256 | } 257 | ], 258 | "no-useless-call": "error", 259 | "no-useless-computed-key": "error", 260 | "no-useless-constructor": "error", 261 | "no-useless-escape": "error", 262 | "no-useless-rename": "error", 263 | "no-useless-return": "error", 264 | "no-whitespace-before-property": "error", 265 | "no-with": "error", 266 | "object-curly-spacing": ["error", "always"], 267 | "object-property-newline": [ 268 | "error", 269 | { 270 | "allowMultiplePropertiesPerLine": true 271 | } 272 | ], 273 | "one-var": [ 274 | "error", 275 | { 276 | "initialized": "never" 277 | } 278 | ], 279 | "operator-linebreak": [ 280 | "error", 281 | "after", 282 | { 283 | "overrides": { 284 | "?": "before", 285 | ":": "before" 286 | } 287 | } 288 | ], 289 | "padded-blocks": [ 290 | "error", 291 | { 292 | "blocks": "never", 293 | "switches": "never", 294 | "classes": "never" 295 | } 296 | ], 297 | "prefer-promise-reject-errors": "error", 298 | "quotes": [ 299 | "error", 300 | "double", 301 | { 302 | "avoidEscape": true, 303 | "allowTemplateLiterals": true 304 | } 305 | ], 306 | "rest-spread-spacing": ["error", "never"], 307 | "semi-spacing": [ 308 | "error", 309 | { 310 | "before": false, 311 | "after": true 312 | } 313 | ], 314 | "space-before-blocks": ["error", "always"], 315 | "space-before-function-paren": ["error", "always"], 316 | "space-in-parens": ["error", "never"], 317 | "space-infix-ops": "error", 318 | "space-unary-ops": [ 319 | "error", 320 | { 321 | "words": true, 322 | "nonwords": false 323 | } 324 | ], 325 | "spaced-comment": [ 326 | "error", 327 | "always", 328 | { 329 | "line": { 330 | "markers": ["*package", "!", "/", ",", "="] 331 | }, 332 | "block": { 333 | "balanced": true, 334 | "markers": ["*package", "!", ",", ":", "::", "flow-include"], 335 | "exceptions": ["*"] 336 | } 337 | } 338 | ], 339 | "symbol-description": "error", 340 | "template-curly-spacing": ["error", "never"], 341 | "template-tag-spacing": ["error", "never"], 342 | "unicode-bom": ["error", "never"], 343 | "use-isnan": "error", 344 | "valid-typeof": [ 345 | "error", 346 | { 347 | "requireStringLiterals": true 348 | } 349 | ], 350 | "wrap-iife": [ 351 | "error", 352 | "any", 353 | { 354 | "functionPrototypeMethods": true 355 | } 356 | ], 357 | "yield-star-spacing": ["error", "both"], 358 | "yoda": ["error", "never"] 359 | } 360 | } 361 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Logs 2 | logs 3 | *.log 4 | npm-debug.log* 5 | yarn-debug.log* 6 | yarn-error.log* 7 | lerna-debug.log* 8 | 9 | # Diagnostic reports (https://nodejs.org/api/report.html) 10 | report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json 11 | 12 | # Runtime data 13 | pids 14 | *.pid 15 | *.seed 16 | *.pid.lock 17 | 18 | # Directory for instrumented libs generated by jscoverage/JSCover 19 | lib-cov 20 | 21 | # Coverage directory used by tools like istanbul 22 | coverage 23 | *.lcov 24 | 25 | # nyc test coverage 26 | .nyc_output 27 | 28 | # Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files) 29 | .grunt 30 | 31 | # Bower dependency directory (https://bower.io/) 32 | bower_components 33 | 34 | # node-waf configuration 35 | .lock-wscript 36 | 37 | # Compiled binary addons (https://nodejs.org/api/addons.html) 38 | build/Release 39 | 40 | # Dependency directories 41 | node_modules/ 42 | jspm_packages/ 43 | 44 | # TypeScript v1 declaration files 45 | typings/ 46 | 47 | # TypeScript cache 48 | *.tsbuildinfo 49 | 50 | # Optional npm cache directory 51 | .npm 52 | 53 | # Optional eslint cache 54 | .eslintcache 55 | 56 | # Optional REPL history 57 | .node_repl_history 58 | 59 | # Output of 'npm pack' 60 | *.tgz 61 | 62 | # Yarn Integrity file 63 | .yarn-integrity 64 | 65 | # dotenv environment variables file 66 | .env 67 | .env.test 68 | 69 | # parcel-bundler cache (https://parceljs.org/) 70 | .cache 71 | 72 | # next.js build output 73 | .next 74 | 75 | # nuxt.js build output 76 | .nuxt 77 | 78 | # vuepress build output 79 | .vuepress/dist 80 | 81 | # Serverless directories 82 | .serverless/ 83 | 84 | # FuseBox cache 85 | .fusebox/ 86 | 87 | # DynamoDB Local files 88 | .dynamodb/ 89 | 90 | how.js 91 | snapshot.config.json 92 | tx 93 | balances 94 | .cache 95 | .vscode -------------------------------------------------------------------------------- /.prettierrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "trailingComma": "none", 3 | "tabWidth": 2, 4 | "semi": true, 5 | "singleQuote": false, 6 | "printWidth": 200 7 | } 8 | -------------------------------------------------------------------------------- /abi.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const abi = [ 4 | { 5 | constant: true, 6 | inputs: [], 7 | name: "name", 8 | outputs: [ 9 | { 10 | name: "", 11 | type: "string" 12 | } 13 | ], 14 | payable: false, 15 | stateMutability: "view", 16 | type: "function" 17 | }, 18 | { 19 | constant: true, 20 | inputs: [], 21 | name: "decimals", 22 | outputs: [ 23 | { 24 | name: "", 25 | type: "uint8" 26 | } 27 | ], 28 | payable: false, 29 | stateMutability: "view", 30 | type: "function" 31 | }, 32 | { 33 | constant: true, 34 | inputs: [ 35 | { 36 | name: "_owner", 37 | type: "address" 38 | } 39 | ], 40 | name: "balanceOf", 41 | outputs: [ 42 | { 43 | name: "balance", 44 | type: "uint256" 45 | } 46 | ], 47 | payable: false, 48 | stateMutability: "view", 49 | type: "function" 50 | }, 51 | { 52 | constant: true, 53 | inputs: [], 54 | name: "symbol", 55 | outputs: [ 56 | { 57 | name: "", 58 | type: "string" 59 | } 60 | ], 61 | payable: false, 62 | stateMutability: "view", 63 | type: "function" 64 | }, 65 | { 66 | anonymous: false, 67 | inputs: [ 68 | { 69 | indexed: true, 70 | name: "from", 71 | type: "address" 72 | }, 73 | { 74 | indexed: true, 75 | name: "to", 76 | type: "address" 77 | }, 78 | { 79 | indexed: false, 80 | name: "value", 81 | type: "uint256" 82 | } 83 | ], 84 | name: "Transfer", 85 | type: "event" 86 | } 87 | ]; 88 | 89 | module.exports.getABI = () => { 90 | return abi; 91 | }; 92 | -------------------------------------------------------------------------------- /balances.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | var BigNumber = require("bignumber.js"); 3 | const enumerable = require("linq"); 4 | 5 | module.exports.createBalances = async data => { 6 | const balances = new Map(); 7 | const closingBalances = []; 8 | 9 | const setDeposits = event => { 10 | const wallet = event.to; 11 | 12 | let deposits = (balances.get(wallet) || {}).deposits || new BigNumber(0); 13 | let withdrawals = (balances.get(wallet) || {}).withdrawals || new BigNumber(0); 14 | 15 | if (event.value) { 16 | deposits = deposits.plus(new BigNumber(event.value)); 17 | balances.set(wallet, { deposits, withdrawals }); 18 | } 19 | }; 20 | 21 | const setWithdrawals = event => { 22 | const wallet = event.from; 23 | 24 | let deposits = (balances.get(wallet) || {}).deposits || new BigNumber(0); 25 | let withdrawals = (balances.get(wallet) || {}).withdrawals || new BigNumber(0); 26 | 27 | if (event.value) { 28 | withdrawals = withdrawals.plus(new BigNumber(event.value)); 29 | balances.set(wallet, { deposits, withdrawals }); 30 | } 31 | }; 32 | 33 | for (const event of data.events) { 34 | setDeposits(event); 35 | setWithdrawals(event); 36 | } 37 | 38 | for (const [key, value] of balances.entries()) { 39 | if (key === "0x0000000000000000000000000000000000000000") { 40 | continue; 41 | } 42 | 43 | const balance = value.deposits.minus(value.withdrawals); 44 | 45 | closingBalances.push({ 46 | wallet: key, 47 | balance: balance.div(10 ** parseInt(data.decimals)).toFixed(data.decimals) 48 | }); 49 | } 50 | 51 | return enumerable 52 | .from(closingBalances) 53 | .orderByDescending(x => parseFloat(x.balance)) 54 | .toArray(); 55 | }; 56 | -------------------------------------------------------------------------------- /config.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const fs = require("fs"); 4 | const inquirer = require("inquirer"); 5 | 6 | const Parameters = require("./parameters").get(); 7 | 8 | const { promisify } = require("util"); 9 | const writeFileAsync = promisify(fs.writeFile); 10 | const fileExists = promisify(fs.exists); 11 | 12 | module.exports.checkConfig = async () => { 13 | const exists = await fileExists(Parameters.configFileName); 14 | 15 | if (exists) { 16 | return; 17 | } 18 | 19 | const config = await inquirer.prompt(Parameters.configQuestions); 20 | await writeFileAsync("./snapshot.config.json", JSON.stringify(config, null, 2)); 21 | console.info("Configuration file was successfully created. Please run the program again."); 22 | process.exit(); 23 | }; 24 | 25 | module.exports.getConfig = () => { 26 | try { 27 | const contents = fs.readFileSync(Parameters.configFileName); 28 | return JSON.parse(contents); 29 | } catch (e) { 30 | console.error("Configuration file was not found."); 31 | } 32 | }; 33 | -------------------------------------------------------------------------------- /contract.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const Web3 = require("web3"); 4 | 5 | const Config = require("./config").getConfig(); 6 | const Parameters = require("./parameters").get(); 7 | 8 | const web3 = new Web3(new Web3.providers.HttpProvider((Config || {}).provider || "http://localhost:8545")); 9 | const contractAddress = (Config || {}).contractAddress; 10 | 11 | module.exports.getContract = () => { 12 | const contract = web3.eth.Contract(Parameters.abi, contractAddress); 13 | return contract; 14 | }; 15 | -------------------------------------------------------------------------------- /events/block-by-block.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const FileHelper = require("../file-helper"); 4 | const Parameters = require("../parameters").get(); 5 | 6 | const range = (start, end) => { 7 | return Array(end - start + 1) 8 | .fill() 9 | .map((_, idx) => start + idx); 10 | }; 11 | 12 | module.exports.tryBlockByBlock = async (contract, start, end, symbol) => { 13 | const blocks = range(start, end); 14 | 15 | let counter = 0; 16 | for await (const i of blocks) { 17 | counter++; 18 | console.log("%d% Block %d of %d", Math.floor((counter / (end - start)) * 100), i, end); 19 | 20 | const pastEvents = await contract.getPastEvents("Transfer", { fromBlock: i, toBlock: i }); 21 | 22 | if (pastEvents.length) { 23 | console.info("Successfully imported ", pastEvents.length, " events"); 24 | 25 | const file = Parameters.eventsDownloadFilePath.replace(/{token}/g, symbol).replace(/{blockNumber}/g, pastEvents[0].blockNumber); 26 | FileHelper.writeFile(file, pastEvents); 27 | } 28 | } 29 | }; 30 | -------------------------------------------------------------------------------- /events/block-reader.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const fs = require("fs"); 4 | const path = require("path"); 5 | 6 | const { promisify } = require("util"); 7 | 8 | const Parameters = require("../parameters").get(); 9 | 10 | const readdirAsync = promisify(fs.readdir); 11 | const readFileAsync = promisify(fs.readFile); 12 | 13 | const getMinimal = pastEvents => { 14 | return pastEvents.map(tx => { 15 | return { 16 | transactionHash: tx.transactionHash, 17 | from: tx.returnValues["0"], 18 | to: tx.returnValues["1"], 19 | value: tx.returnValues["2"]._hex 20 | }; 21 | }); 22 | }; 23 | 24 | module.exports.getEvents = async symbol => { 25 | const directory = Parameters.eventsDownloadFolder.replace(/{token}/g, symbol); 26 | var files = await readdirAsync(directory); 27 | files.sort((a,b) => { 28 | return parseInt(a.split(".")[0]) - parseInt(b.split(".")[0]); 29 | }); 30 | let events = []; 31 | 32 | console.log("Parsing files."); 33 | 34 | for await (const file of files) { 35 | console.log("Parsing ", file); 36 | 37 | const contents = await readFileAsync(path.join(directory, file)); 38 | const parsed = JSON.parse(contents.toString()); 39 | events = events.concat(getMinimal(parsed)); 40 | } 41 | 42 | return events; 43 | }; 44 | -------------------------------------------------------------------------------- /events/blockchain.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const Web3 = require("web3"); 4 | 5 | const BlockByBlock = require("./block-by-block"); 6 | const BlockReader = require("./block-reader"); 7 | const Config = require("../config").getConfig(); 8 | const Contract = require("../contract").getContract(); 9 | const FileHelper = require("../file-helper"); 10 | const LastDownloadedBlock = require("./last-downloaded-block"); 11 | const Parameters = require("../parameters").get(); 12 | 13 | const { promisify } = require("util"); 14 | 15 | const sleep = promisify(setTimeout); 16 | 17 | const web3 = new Web3(new Web3.providers.HttpProvider((Config || {}).provider || "http://localhost:8545")); 18 | 19 | const groupBy = (objectArray, property) => { 20 | return objectArray.reduce((acc, obj) => { 21 | var key = obj[property]; 22 | if (!acc[key]) { 23 | acc[key] = []; 24 | } 25 | acc[key].push(obj); 26 | return acc; 27 | }, {}); 28 | }; 29 | 30 | const tryGetEvents = async (start, end, symbol) => { 31 | try { 32 | const pastEvents = await Contract.getPastEvents("Transfer", { fromBlock: start, toBlock: end }); 33 | 34 | if (pastEvents.length) { 35 | console.info("Successfully imported ", pastEvents.length, " events"); 36 | } 37 | 38 | const group = groupBy(pastEvents, "blockNumber"); 39 | 40 | for (let key in group) { 41 | if (group.hasOwnProperty(key)) { 42 | const blockNumber = key; 43 | const data = group[key]; 44 | 45 | const file = Parameters.eventsDownloadFilePath.replace(/{token}/g, symbol).replace(/{blockNumber}/g, blockNumber); 46 | 47 | FileHelper.writeFile(file, data); 48 | } 49 | } 50 | } catch (e) { 51 | console.log("Could not get events due to an error. Now checking block by block."); 52 | await BlockByBlock.tryBlockByBlock(Contract, start, end, symbol); 53 | } 54 | }; 55 | 56 | module.exports.get = async () => { 57 | const name = await Contract.methods.name().call(); 58 | const symbol = await Contract.methods.symbol().call(); 59 | const decimals = await Contract.methods.decimals().call(); 60 | const blockHeight = await web3.eth.getBlockNumber(); 61 | var fromBlock = parseInt(Config.fromBlock) || 0; 62 | const blocksPerBatch = parseInt(Config.blocksPerBatch) || 0; 63 | const delay = parseInt(Config.delay) || 0; 64 | const toBlock = blockHeight; 65 | 66 | const lastDownloadedBlock = await LastDownloadedBlock.get(symbol); 67 | 68 | if (lastDownloadedBlock) { 69 | console.log("Resuming from the last downloaded block #", lastDownloadedBlock); 70 | fromBlock = lastDownloadedBlock + 1; 71 | } 72 | 73 | console.log("From %d to %d", fromBlock, toBlock); 74 | 75 | let start = fromBlock; 76 | let end = fromBlock + blocksPerBatch; 77 | let i = 0; 78 | 79 | while (end < toBlock) { 80 | i++; 81 | 82 | if (delay) { 83 | await sleep(delay); 84 | } 85 | 86 | console.log("Batch", i + 1, " From", start, "to", end); 87 | 88 | await tryGetEvents(start, end, symbol); 89 | 90 | start = end + 1; 91 | end = start + blocksPerBatch; 92 | 93 | if (end > toBlock) { 94 | end = toBlock; 95 | } 96 | } 97 | 98 | const events = await BlockReader.getEvents(symbol); 99 | 100 | const data = { 101 | name, 102 | symbol, 103 | decimals, 104 | events: events 105 | }; 106 | 107 | return data; 108 | }; 109 | -------------------------------------------------------------------------------- /events/last-downloaded-block.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const fs = require("fs"); 4 | 5 | const enumerable = require("linq"); 6 | 7 | const Parameters = require("../parameters").get(); 8 | 9 | const { promisify } = require("util"); 10 | const readdirAsync = promisify(fs.readdir); 11 | const folderExistsAsync = promisify(fs.exists); 12 | 13 | module.exports.get = async symbol => { 14 | const downloadFolder = Parameters.eventsDownloadFolder.replace("{token}", symbol); 15 | 16 | if (!(await folderExistsAsync(downloadFolder))) { 17 | return 0; 18 | } 19 | const files = await readdirAsync(downloadFolder); 20 | 21 | return enumerable 22 | .from(files) 23 | .select(x => { 24 | return parseInt(x.replace(".json", "")) || 0; 25 | }) 26 | .max(x => x); 27 | }; 28 | -------------------------------------------------------------------------------- /export.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | const path = require("path"); 3 | const FileHelper = require("./file-helper"); 4 | const Parameters = require("./parameters").get(); 5 | const WalletType = require("./wallet-type"); 6 | 7 | const objectToCsv = require("csv-writer").createObjectCsvWriter; 8 | 9 | module.exports.exportBalances = async (symbol, balances, format) => { 10 | const withType = await WalletType.addType(balances); 11 | 12 | const writeCsv = () => { 13 | const file = Parameters.outputFileNameCSV.replace(/{token}/g, symbol); 14 | FileHelper.ensureDirectory(path.dirname(file)); 15 | 16 | const writer = objectToCsv({ 17 | path: file, 18 | header: [{ id: "wallet", title: "Wallet" }, { id: "balance", title: "Balance" }, { id: "type", title: "Type" }] 19 | }); 20 | 21 | console.log("Exporting CSV"); 22 | writer.writeRecords(withType).then(() => console.log("CSV export done!")); 23 | }; 24 | 25 | if (["csv", "both"].indexOf(format.toLowerCase()) > -1) { 26 | writeCsv(); 27 | 28 | if (format.toLowerCase() === "csv") { 29 | return; 30 | } 31 | } 32 | 33 | console.log("Exporting JSON"); 34 | await FileHelper.writeFile(Parameters.outputFileNameJSON.replace(/{token}/g, symbol), withType); 35 | console.log("JSON export done!"); 36 | }; 37 | -------------------------------------------------------------------------------- /file-helper.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const fs = require("fs"); 4 | const path = require("path"); 5 | 6 | const { promisify } = require("util"); 7 | 8 | const existsAsync = promisify(fs.exists); 9 | const makeDirectoryAsync = promisify(fs.mkdir); 10 | const readFileAsync = promisify(fs.readFile); 11 | const writeFileAsync = promisify(fs.writeFile); 12 | 13 | const ensureDirectoryExists = async directory => { 14 | try { 15 | await makeDirectoryAsync(directory, { recursive: true }); 16 | } catch (err) { 17 | console.log(err); 18 | } 19 | }; 20 | 21 | module.exports.ensureDirectory = async directory => { 22 | ensureDirectoryExists(directory); 23 | }; 24 | 25 | module.exports.writeFile = async (filePath, data) => { 26 | await ensureDirectoryExists(path.dirname(filePath)); 27 | await writeFileAsync(filePath, JSON.stringify(data, null, 2)); 28 | }; 29 | 30 | module.exports.parseFile = async filePath => { 31 | if (await existsAsync(filePath)) { 32 | const contents = await readFileAsync(filePath); 33 | return JSON.parse(contents.toString()); 34 | } 35 | 36 | return null; 37 | }; 38 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env node 2 | "use strict"; 3 | 4 | const Balances = require("./balances"); 5 | const Config = require("./config"); 6 | const Events = require("./events/blockchain"); 7 | const Export = require("./export"); 8 | 9 | const start = async () => { 10 | await Config.checkConfig(); 11 | const format = Config.getConfig().format; 12 | const result = await Events.get(); 13 | 14 | console.log("Calculating balances of %s (%s)", result.name, result.symbol); 15 | const balances = await Balances.createBalances(result); 16 | 17 | console.log("Exporting balances"); 18 | await Export.exportBalances(result.symbol, balances, format); 19 | }; 20 | 21 | (async () => { 22 | try { 23 | await start(); 24 | } catch (e) { 25 | console.error(e); 26 | } 27 | })(); 28 | -------------------------------------------------------------------------------- /package-lock.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "erc20-snapshot", 3 | "version": "1.0.2", 4 | "lockfileVersion": 1, 5 | "requires": true, 6 | "dependencies": { 7 | "@babel/runtime": { 8 | "version": "7.4.5", 9 | "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.4.5.tgz", 10 | "integrity": "sha512-TuI4qpWZP6lGOGIuGWtp9sPluqYICmbk8T/1vpSysqJxRPkudh/ofFWyqdcMsDf2s7KvDL4/YHgKyvcS3g9CJQ==", 11 | "requires": { 12 | "regenerator-runtime": "^0.13.2" 13 | } 14 | }, 15 | "@types/bn.js": { 16 | "version": "4.11.5", 17 | "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.5.tgz", 18 | "integrity": "sha512-AEAZcIZga0JgVMHNtl1CprA/hXX7/wPt79AgR4XqaDt7jyj3QWYw6LPoOiznPtugDmlubUnAahMs2PFxGcQrng==", 19 | "requires": { 20 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"https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz", 1376 | "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=" 1377 | }, 1378 | "yaeti": { 1379 | "version": "0.0.6", 1380 | "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz", 1381 | "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc=" 1382 | } 1383 | } 1384 | } 1385 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "erc20-snapshot", 3 | "version": "1.0.2", 4 | "description": "ERC20 Token Snapshot", 5 | "main": "index.js", 6 | "scripts": { 7 | "test": "echo \"Error: no test specified\" && exit 1" 8 | }, 9 | "bin": { 10 | "erc20-snapshot": "index.js" 11 | }, 12 | "keywords": [ 13 | "ethereum", 14 | "erc20", 15 | "token", 16 | "snapshot" 17 | ], 18 | "author": "Binod Nirvan", 19 | "license": "Apache-2.0", 20 | "homepage": "https://github.com/binodnp/erc20-snapshot", 21 | "repository": { 22 | "type": "git", 23 | "url": "https://github.com/binodnp/erc20-snapshot" 24 | }, 25 | "dependencies": { 26 | "csv-writer": "^1.3.0", 27 | "inquirer": "^6.3.1", 28 | "linq": "^3.2.0", 29 | "web3": "^1.0.0-beta.55", 30 | "bignumber.js": "^7.2.1" 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /parameters.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const path = require("path"); 4 | const abi = require("./abi"); 5 | 6 | const parameters = { 7 | abi: abi.getABI(), 8 | configFileName: path.join(process.cwd(), "snapshot.config.json"), 9 | configQuestions: [ 10 | { 11 | type: "input", 12 | name: "provider", 13 | message: "Enter the URL of web3 provider", 14 | default: "http://localhost:8545" 15 | }, 16 | { 17 | type: "input", 18 | name: "contractAddress", 19 | message: "Enter your contract address" 20 | }, 21 | { 22 | type: "input", 23 | name: "fromBlock", 24 | message: "Enter the block number to start from", 25 | default: 0 26 | }, 27 | { 28 | type: "input", 29 | name: "toBlock", 30 | message: "Enter the block number to end at", 31 | default: "latest" 32 | }, 33 | { 34 | type: "input", 35 | name: "blocksPerBatch", 36 | message: "Blocks per batch", 37 | default: 2500 38 | }, 39 | { 40 | type: "input", 41 | name: "delay", 42 | message: "Delay per iteration (ms)", 43 | default: 0 44 | }, 45 | { 46 | type: "input", 47 | name: "format", 48 | message: "Format -> csv, json, both", 49 | default: "both" 50 | }, 51 | { 52 | type: "input", 53 | name: "checkIfContract", 54 | message: "Check addresses if they are contracts or wallets?", 55 | default: "yes" 56 | } 57 | ], 58 | knownTypes: path.join(process.cwd(), "/.cache/known-types.json"), 59 | outputFileNameCSV: path.join(process.cwd(), "./balances/{token}.csv"), 60 | outputFileNameJSON: path.join(process.cwd(), "./balances/{token}.json"), 61 | eventsDownloadFolder: path.join(process.cwd(), "./tx/{token}/"), 62 | eventsDownloadFilePath: path.join(process.cwd(), "./tx/{token}/{blockNumber}.json") 63 | }; 64 | 65 | module.exports.get = () => { 66 | return parameters; 67 | }; 68 | -------------------------------------------------------------------------------- /readme.md: -------------------------------------------------------------------------------- 1 | # Token Snapshot: Create ERC20 Token Snapshot 2 | 3 | This command-line utility creates a snapshot of any ERC20 token in JSON or CSV format. Use your own fully synced Ethereum node or any _Ethereum node as a service_ like Infura. 4 | 5 | - Works without a local Ethereum node. 6 | - Automatically resumes the next time upon failure. 7 | - Tested to work with Infura. 8 | 9 | ## Getting Started 10 | 11 | ``` 12 | npm install erc20-snapshot -g 13 | ``` 14 | 15 | ### CLI Arguments 16 | 17 | None. Prompts for user input and produces a configuration file on the first run. 18 | 19 | ### How to Use Token Snapshot? 20 | 21 | Navigate to a directory where you'd like to save the token snapshot to. 22 | 23 | ``` 24 | cd path/to/a/directory 25 | ``` 26 | 27 | Run the program: 28 | 29 | ``` 30 | erc20-snapshot 31 | ``` 32 | 33 | ## Configuration File / Prompt Parameters 34 | 35 | ```json 36 | { 37 | "provider": "https://mainnet.infura.io/v3/", 38 | "contractAddress": "", 39 | "fromBlock": 0, 40 | "toBlock": "latest", 41 | "format": "json", 42 | "blocksPerBatch": 2500, 43 | "delay": 0, 44 | "checkIfContract": "yes" 45 | } 46 | ``` 47 | 48 | ### provider 49 | 50 | Enter your fully synced Ethereum node. Could be a local node or remote services like Infura. 51 | 52 | ### contractAddress 53 | 54 | Address of your ERC20 token. 55 | 56 | ### fromBlock 57 | 58 | The block height to scan from. To save time, enter the block number of the transaction your token was created on. 59 | 60 | ### toBlock 61 | 62 | The block height to end the scan at. 63 | 64 | ### blocksPerBatch 65 | 66 | The number of blocks to query per batch. 67 | 68 | If you are using remote service like Infura, keep this number relative low (2000-5000) to avoid rate limits. If you are using a dedicated Ethereum node, you can increase this number to suit your needs. 69 | 70 | ### delay 71 | 72 | The delay (in ms) between each request in the loop. Tweak this if you are experiencing rate limit from your provider. 73 | 74 | ### checkIfContract 75 | 76 | Checks each address to determine whether it is a smart contract or an Ethereum wallet. 77 | 78 | ## You May Also Like 79 | 80 | - [Vyper ERC20 Contracts](https://github.com/binodnp/vyper-erc20) 81 | - [Vyper Crowdsale Contracts](https://github.com/binodnp/vyper-crowdsale) 82 | - [Solidoc: Solidity Documentation Generator](https://github.com/CYBRToken/solidoc) 83 | - [SolFlattener: Solidity Flattener](https://github.com/CYBRToken/sol-flattener) 84 | - [Vesting Schedule](https://github.com/binodnp/vesting-schedule) 85 | -------------------------------------------------------------------------------- /wallet-type.js: -------------------------------------------------------------------------------- 1 | const enumerable = require("linq"); 2 | const Web3 = require("web3"); 3 | const Config = require("./config").getConfig(); 4 | const FileHelper = require("./file-helper"); 5 | const Parameters = require("./parameters").get(); 6 | 7 | const web3 = new Web3(new Web3.providers.HttpProvider((Config || {}).provider || "http://localhost:8545")); 8 | 9 | const findTypeFromCache = (cache, wallet) => { 10 | if (cache && cache.length) { 11 | for (const entry of cache) { 12 | if (entry.wallet === wallet) { 13 | return entry.type; 14 | } 15 | } 16 | } 17 | 18 | return null; 19 | }; 20 | 21 | module.exports.addType = async balances => { 22 | if (Config.checkIfContract.toLowerCase() !== "yes") { 23 | return balances; 24 | } 25 | 26 | let counter = 0; 27 | let cache = await FileHelper.parseFile(Parameters.knownTypes); 28 | 29 | for await (const balance of balances) { 30 | counter++; 31 | let type = findTypeFromCache(cache, balance.wallet); 32 | console.log("%d of %d. Determining if %s is a contract.", counter, balances.length, balance.wallet); 33 | 34 | if (!type) { 35 | type = "wallet"; 36 | 37 | const code = await web3.eth.getCode(balance.wallet); 38 | 39 | if (code != "0x") { 40 | type = "contract"; 41 | console.log("✓", balance.wallet, "is a contract."); 42 | } 43 | } 44 | 45 | balance.type = type; 46 | } 47 | 48 | const knownTypes = enumerable 49 | .from(balances) 50 | .select(x => { 51 | return { wallet: x.wallet, type: x.type }; 52 | }) 53 | .toArray(); 54 | 55 | await FileHelper.writeFile(Parameters.knownTypes, knownTypes); 56 | 57 | return enumerable 58 | .from(balances) 59 | .orderBy(x => x.type) 60 | .thenByDescending(x => parseFloat(x.balance)) 61 | .toArray(); 62 | }; 63 | --------------------------------------------------------------------------------