ERROR IN TRUFFLE
Error: Truffle is currently using solc 0.5.16, but one or more of your contracts specify "pragma solidity ^0.8.0".
Please update your truffle config or pragma statement(s).
(See https://trufflesuite.com/docs/truffle/reference/configuration#compiler-configuration for information on
configuring Truffle to use a specific solc compiler version.)
ERROR IN HARDHAT
> HardhatError: HH110: Invalid JSON-RPC response received: <h1>Not Found</h1><p>The requested resource was not found on this server.</p>
Environment
Details
error compiling contracts 0.8.0 in macos
Code to reproduce
/**
* Use this file to configure your truffle project. It's seeded with some
* common settings for different networks and features like migrations,
* compilation and testing. Uncomment the ones you need or modify
* them to suit your project as necessary.
*
* More information about configuration can be found at:
*
* trufflesuite.com/docs/advanced/configuration
*
* To deploy via Infura you'll need a wallet provider (like @truffle/hdwallet-provider)
* to sign your transactions before they're sent to a remote public node. Infura accounts
* are available for free at: infura.io/register.
*
* You'll also need a mnemonic - the twelve word phrase the wallet uses to generate
* public/private key pairs. If you're publishing your code to GitHub make sure you load this
* phrase from a file you've .gitignored so it doesn't accidentally become public.
*
*/
const { projectId, mnemonic,etherscanApiKey } = require('./secrets.json');
const HDWalletProvider = require('@truffle/hdwallet-provider');
module.exports = {
/**
* Networks define how you connect to your ethereum client and let you set the
* defaults web3 uses to send transactions. If you don't specify one truffle
* will spin up a development blockchain for you on port 9545 when you
* run `develop` or `test`. You can ask a truffle command to use a specific
* network from the command line, e.g
*
* $ truffle test --network <network-name>
*/
networks: {
// Useful for testing. The `development` name is special - truffle uses it by default
// if it's defined here and no other network is specified at the command line.
// You should run a client (like ganache-cli, geth or parity) in a separate terminal
// tab if you use this network and you must also set the `host`, `port` and `network_id`
// options below to some value.
//
// development: {
// host: "127.0.0.1", // Localhost (default: none)
// port: 8545, // Standard Ethereum port (default: none)
// network_id: "*", // Any network (default: none)
// },
// Another network with more advanced options...
// advanced: {
// port: 8777, // Custom port
// network_id: 1342, // Custom network
// gas: 8500000, // Gas sent with each transaction (default: ~6700000)
// gasPrice: 20000000000, // 20 gwei (in wei) (default: 100 gwei)
// from: <address>, // Account to send txs from (default: accounts[0])
// websocket: true // Enable EventEmitter interface for web3 (default: false)
// },
// Useful for deploying to a public network.
// NB: It's important to wrap the provider as a function.
rinkeby: {
provider: () => new HDWalletProvider(mnemonic, (MNEMONIC, API_URL)),
network_id: 3, // Ropsten's id
gas: 5500000, // Ropsten has a lower block limit than mainnet
confirmations: 2, // # of confs to wait between deployments. (default: 0)
timeoutBlocks: 200, // # of blocks before a deployment times out (minimum/default: 50)
skipDryRun: true // Skip dry run before migrations? (default: false for public nets )
},
//Useful for private networks
// private: {
// provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
// network_id: 2111, // This network is yours, in the cloud.
// production: true // Treats this network as if it was a public net. (default: false)
// }
///},
// Set default mocha options here, use special reporters etc.
mocha: {
// timeout: 100000
},
// Configure your compilers
compilers: {
solc: {
version: "0.8.0", // Fetch exact version from solc-bin (default: truffle's version)
paser : "solcjs", // Use "0.5.1" you've installed locally with docker (default: false)
settings: { // See the solidity docs for advice about optimization and evmVersion
optimizer: {
enabled: true,
runs: 200
},
},
},
},
//
}
}
CODE IN HARHDAT
c onst { alchemyApiKey, mnemonic } = require('./secrets.json');
require('@nomiclabs/hardhat-truffle5');
require('@nomiclabs/hardhat-solhint');
require('solidity-coverage');
require('hardhat-gas-reporter');
require('@openzeppelin/hardhat-upgrades');
require("@nomiclabs/hardhat-ethers");
require("@nomiclabs/hardhat-waffle");
const enableGasReport = !!process.env.ENABLE_GAS_REPORT;
const enableProduction = process.env.COMPILE_MODE === 'production';
/**
* @type import('hardhat/config').HardhatUserConfig
*/
module.exports = {
defaultNetwork: "rinkeby",
networks :{
hardhat :{
blockGasLimit: 10000000
},
rinkeby:{
url:"https://eth-rinkeby.alchemyapi.io/v2/${alchemyApiKey}",
accounts: {mnemonic: mnemonic}
}
},
solidity: {
version: '0.8.0',
settings: {
optimizer: {
enabled:true,
enabled: enableGasReport || enableProduction,
runs: 200,
},
},
gasReporter: {
enable: enableGasReport,
currency: 'USD',
outputFile: process.env.CI ? 'gas-report.txt' : undefined,
}
}
};