I'm following a solidity tutorial right now and I'm currently encountering an error when I run truffle migrate. Also, testrpc is running in another terminal tab, so this issue is unrelated to the others on here.
I run truffle init and then add my HelloWorld.sol smart contract to the contracts folder.
pragma solidity ^0.4.11;
contract HelloWorld {
uint public balance;
function HelloWorld(){
balance = 1000;
}
}
I then run truffle compile and everything works fine
Compiling ./contracts/ConvertLib.sol...
Compiling ./contracts/HelloWorld.sol...
Compiling ./contracts/MetaCoin.sol...
Compiling ./contracts/Migrations.sol...
Writing artifacts to ./build/contracts
I then added the following to my 2_deploy_contracts.js migration file
var HelloWorld = artifacts.require("./HelloWorld.sol");
module.exports = function(deployer) {
deployer.deploy(HelloWorld);
};
However when I run truffle migrate I receive the following error:
Error: Cannot find module 'truffle-expect'
at Function.Module._resolveFilename (module.js:470:15)
at Function.Module._load (module.js:418:25)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:85773:14)
at __webpack_require__ (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:21:30)
at Object.<anonymous> (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:59914:15)
at __webpack_require__ (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:21:30)
at Object.<anonymous> (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:201851:15)
at __webpack_require__ (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:21:30)
I've tried npm installing truffle-expect but that doesn't seem to work either… Any thoughts?
Best Answer
1) Run the following command:
2) Run
testrpc
in another shell instance3) Run
truffle migrate
in your truffle project directory