import axios from 'axios'; import { Contract } from 'ethers/lib/ethers'; import { HardhatRuntimeEnvironment } from 'hardhat/types'; import { DRE } from './misc-utils'; import { ePolygonNetwork, EthereumNetworkNames } from './types'; const TASK_FLATTEN_GET_FLATTENED_SOURCE = 'flatten:get-flattened-sources'; const TASK_COMPILE_SOLIDITY_GET_SOURCE_PATHS = 'compile:solidity:get-source-paths'; /* Polygon Helpers */ export const usingPolygon = () => DRE && Object.keys(ePolygonNetwork).includes((DRE as HardhatRuntimeEnvironment).network.name); /* Polygon Verifier */ const SOLIDITY_PRAGMA = 'pragma solidity'; const LICENSE_IDENTIFIER = 'License-Identifier'; const EXPERIMENTAL_ABIENCODER = 'pragma experimental ABIEncoderV2;'; const encodeDeployParams = (instance: Contract, args: (string | string[])[]) => { return instance.interface.encodeDeploy(args).replace('0x', ''); }; // Remove lines at "text" that includes "matcher" string, but keeping first "keep" lines const removeLines = (text: string, matcher: string, keep = 0): string => { let counter = keep; return text .split('\n') .filter((line) => { const match = !line.includes(matcher); if (match === false && counter > 0) { counter--; return true; } return match; }) .join('\n'); }; // Try to find the path of a Contract by name of the file without ".sol" const findPath = async (id: string): Promise => { const paths = await DRE.run(TASK_COMPILE_SOLIDITY_GET_SOURCE_PATHS); const path = paths.find((x) => { const t = x.split('/'); return t[t.length - 1].split('.')[0] == id; }); if (!path) { throw Error('Missing path for contract name: ${id}'); } return path; }; // Hardhat Flattener, similar to truffle flattener const hardhatFlattener = async (filePath: string) => await DRE.run(TASK_FLATTEN_GET_FLATTENED_SOURCE, { files: [filePath] }); // Verify a smart contract at Polygon Matic network via a GET request to the block explorer export const verifyAtPolygon = async ( id: string, instance: Contract, args: (string | string[])[] ) => { /* ${net == mumbai or mainnet} https://explorer-${net}.maticvigil.com/api ?module=contract &action=verify &addressHash={addressHash} &name={name} &compilerVersion={compilerVersion} &optimization={false} &contractSourceCode={contractSourceCode} */ const network = (DRE as HardhatRuntimeEnvironment).network.name; const net = network === EthereumNetworkNames.matic ? 'mainnet' : network; const filePath = await findPath(id); const encodedConstructorParams = encodeDeployParams(instance, args); const flattenSourceCode = await hardhatFlattener(filePath); // Remove pragmas and license identifier after first match, required by block explorers like explorer-mainnet.maticgivil.com or Etherscan const cleanedSourceCode = removeLines( removeLines(removeLines(flattenSourceCode, LICENSE_IDENTIFIER, 1), SOLIDITY_PRAGMA, 1), EXPERIMENTAL_ABIENCODER, 1 ); try { console.log( `[Polygon Verify] Verifying ${id} with address ${instance.address} at Matic ${net} network` ); const response = await axios.post( `https://explorer-${net}.maticvigil.com/api`, { addressHash: instance.address, name: id, compilerVersion: 'v0.6.12+commit.27d51765', optimization: 'true', contractSourceCode: cleanedSourceCode, constructorArguments: encodedConstructorParams, }, { params: { module: 'contract', action: 'verify', }, headers: { 'Content-Type': 'application/json', Referer: 'aavematic-42e1f6da', }, } ); if (response.status === 200 && response.data.message === 'OK') { console.log(`[Polygon Verify] Verified contract at Matic ${net} network.`); console.log( `[Polygon Verify] Check at: https://explorer-${net}.maticvigil.com/address/${instance.address}/contracts) \n` ); return; } throw Error(JSON.stringify(response.data, null, 2)); } catch (error) { if (error?.message.includes('Smart-contract already verified.')) { console.log( `[Polygon Verify] Already verified. Check it at: https://explorer-${net}.maticvigil.com/address/${instance.address}/contracts) \n` ); return; } console.error('[Polygon Verify] Error:', error.toString()); console.log( `[Polygon Verify] Skipping verification for ${id} with ${instance.address} due an unknown error.` ); console.log( `Please proceed with manual verification at https://explorer-${net}.maticvigil.com/address/${instance.address}/contracts` ); console.log(`- Use the following as encoded constructor params`); console.log(encodedConstructorParams); console.log(`- Flattened and cleaned source code`); console.log(cleanedSourceCode); } };