├── .gitignore ├── package.json ├── src └── index.ts └── tsconfig.json /.gitignore: -------------------------------------------------------------------------------- 1 | .env -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "flashbots-minter", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "scripts": { 7 | "test": "echo \"Error: no test specified\" && exit 1" 8 | }, 9 | "keywords": [], 10 | "author": "", 11 | "license": "ISC", 12 | "dependencies": { 13 | "@flashbots/ethers-provider-bundle": "^0.4.3", 14 | "dotenv": "^10.0.0", 15 | "ethers": "^5.5.3", 16 | "ts-node": "^9.1.1" 17 | } 18 | } 19 | -------------------------------------------------------------------------------- /src/index.ts: -------------------------------------------------------------------------------- 1 | import { FlashbotsBundleProvider } from '@flashbots/ethers-provider-bundle' 2 | import { BigNumber, providers, Wallet } from 'ethers' 3 | 4 | require('dotenv').config() 5 | 6 | // FakeArtMinter contract on Goerli 7 | const testHexData = '0x1249c58b' 8 | const testContract = '0x20EE855E43A7af19E407E39E5110c2C1Ee41F64D' 9 | 10 | // Required data 11 | const HEX_DATA = testHexData 12 | const CONTRACT_ADDRESS = testContract 13 | 14 | // The amount of which the average gas price will be multiplied for maxFeePerGas 15 | // => 1.1 equals 10% increase; 1.5 equals 50% increase... 16 | const GAS_LIMIT_MULTIPLIER = 1.1 17 | 18 | const CHAIN_ID = 5 19 | const FLASHBOTS_ENDPOINT = 'https://relay-goerli.flashbots.net' 20 | 21 | const provider = new providers.InfuraProvider(CHAIN_ID) 22 | 23 | if (process.env.WALLET_PRIVATE_KEY === undefined) { 24 | console.error('Please provide WALLET_PRIVATE_KEY in .env') 25 | process.exit(1) 26 | } 27 | 28 | const wallet = new Wallet(process.env.WALLET_PRIVATE_KEY, provider) 29 | 30 | const GWEI = BigNumber.from(10).pow(9) 31 | const ETHER = BigNumber.from(10).pow(18) 32 | 33 | // Custom gas oracle 34 | const getAverageGasFromBlock = async (blockNumber: number) => { 35 | const block = await provider.getBlockWithTransactions(blockNumber) 36 | 37 | let gasPrices: Array = block.transactions.map((tx: any) => { 38 | return tx.gasPrice 39 | }) 40 | 41 | let sum: number = 0 42 | gasPrices.forEach((gasPrice: BigNumber) => { 43 | sum += gasPrice.toNumber() 44 | }) 45 | 46 | const averageGasPrice: BigNumber = BigNumber.from(Math.round(sum / gasPrices.length)) 47 | 48 | return averageGasPrice 49 | } 50 | 51 | const main = async () => { 52 | const flashbotsProvider = await FlashbotsBundleProvider.create( 53 | provider, 54 | Wallet.createRandom(), 55 | FLASHBOTS_ENDPOINT 56 | ) 57 | 58 | provider.on('block', async (blockNumber) => { 59 | console.log(blockNumber) 60 | 61 | const averageGasPrice = await getAverageGasFromBlock(blockNumber - 1) 62 | const maxGasPrice = BigNumber.from(Math.round(averageGasPrice.toNumber() * GAS_LIMIT_MULTIPLIER)) 63 | 64 | const bundleSumbitResponse = await flashbotsProvider.sendBundle([ 65 | { 66 | transaction: { 67 | chainId: CHAIN_ID, 68 | type: 2, 69 | value: ETHER.div(100).mul(3), 70 | data: HEX_DATA, 71 | maxFeePerGas: maxGasPrice, 72 | maxPriorityFeePerGas: GWEI.mul(2), 73 | to: CONTRACT_ADDRESS 74 | }, 75 | signer: wallet 76 | } 77 | ], blockNumber + 1) 78 | 79 | if ('error' in bundleSumbitResponse) { 80 | console.log(bundleSumbitResponse.error.message) 81 | return 82 | } 83 | }) 84 | } 85 | 86 | main() -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | /* Visit https://aka.ms/tsconfig.json to read more about this file */ 4 | 5 | /* Projects */ 6 | // "incremental": true, /* Enable incremental compilation */ 7 | // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ 8 | // "tsBuildInfoFile": "./", /* Specify the folder for .tsbuildinfo incremental compilation files. */ 9 | // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects */ 10 | // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ 11 | // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ 12 | 13 | /* Language and Environment */ 14 | "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ 15 | // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ 16 | // "jsx": "preserve", /* Specify what JSX code is generated. */ 17 | // "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */ 18 | // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ 19 | // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */ 20 | // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ 21 | // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */ 22 | // "reactNamespace": "", /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */ 23 | // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ 24 | // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ 25 | 26 | /* Modules */ 27 | "module": "commonjs", /* Specify what module code is generated. */ 28 | // "rootDir": "./", /* Specify the root folder within your source files. */ 29 | // "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ 30 | // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ 31 | // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ 32 | // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ 33 | // "typeRoots": [], /* Specify multiple folders that act like `./node_modules/@types`. */ 34 | // "types": [], /* Specify type package names to be included without being referenced in a source file. */ 35 | // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ 36 | // "resolveJsonModule": true, /* Enable importing .json files */ 37 | // "noResolve": true, /* Disallow `import`s, `require`s or ``s from expanding the number of files TypeScript should add to a project. */ 38 | 39 | /* JavaScript Support */ 40 | // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */ 41 | // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ 42 | // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */ 43 | 44 | /* Emit */ 45 | // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ 46 | // "declarationMap": true, /* Create sourcemaps for d.ts files. */ 47 | // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ 48 | // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ 49 | // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */ 50 | // "outDir": "./", /* Specify an output folder for all emitted files. */ 51 | // "removeComments": true, /* Disable emitting comments. */ 52 | // "noEmit": true, /* Disable emitting files from a compilation. */ 53 | // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ 54 | // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types */ 55 | // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ 56 | // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ 57 | // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ 58 | // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ 59 | // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ 60 | // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ 61 | // "newLine": "crlf", /* Set the newline character for emitting files. */ 62 | // "stripInternal": true, /* Disable emitting declarations that have `@internal` in their JSDoc comments. */ 63 | // "noEmitHelpers": true, /* Disable generating custom helper functions like `__extends` in compiled output. */ 64 | // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ 65 | // "preserveConstEnums": true, /* Disable erasing `const enum` declarations in generated code. */ 66 | // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ 67 | // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ 68 | 69 | /* Interop Constraints */ 70 | // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ 71 | // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ 72 | "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */ 73 | // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ 74 | "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ 75 | 76 | /* Type Checking */ 77 | "strict": true, /* Enable all strict type-checking options. */ 78 | // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied `any` type.. */ 79 | // "strictNullChecks": true, /* When type checking, take into account `null` and `undefined`. */ 80 | // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ 81 | // "strictBindCallApply": true, /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */ 82 | // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ 83 | // "noImplicitThis": true, /* Enable error reporting when `this` is given the type `any`. */ 84 | // "useUnknownInCatchVariables": true, /* Type catch clause variables as 'unknown' instead of 'any'. */ 85 | // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ 86 | // "noUnusedLocals": true, /* Enable error reporting when a local variables aren't read. */ 87 | // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read */ 88 | // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ 89 | // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ 90 | // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ 91 | // "noUncheckedIndexedAccess": true, /* Include 'undefined' in index signature results */ 92 | // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ 93 | // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type */ 94 | // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ 95 | // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ 96 | 97 | /* Completeness */ 98 | // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ 99 | "skipLibCheck": true /* Skip type checking all .d.ts files. */ 100 | } 101 | } 102 | --------------------------------------------------------------------------------