[Ethereum] How to deploy contracts that take parameters in their initialisers using Truffle?

contract-developmenttruffle

I'm trying to build a smart contract with Truffle. I can compile it just fine, but when I try to deploy it on the network, I don't get an option to pass in the initialiser parameters and thus the contract fails.

How do I pass the parameters to a Truffle-compiled contract during deployment?

Best Answer

In your 2_deploy_contracts.js file you can add parameters when deploying the contract:

var Contract = artifacts.require("./Contract.sol");

module.exports = function(deployer) {
  deployer.deploy(Contract,constructor_param_1, constructor_param_2, ,constructor_param_3, ,constructor_param_etc);

};

Related Solutions

[Ethereum] How to pass constructor parameters to a contract using Truffle

In Truffle, constructor params go in /migrations. So, something like:

deployer.deploy(User, "foo");

User.deployed() will be a User contract that was deployed with _name="foo"

[Ethereum] truffle migrate: How to deploy a contract whose constructor takes a parameter

You can add the constructor parameters as extra arguments to the deploy() call

const BaconMaker = artifacts.require('./BaconMaker.sol')

module.exports = (deployer, network, accounts) => {
  const userAddress = accounts[3];
  deployer.deploy(BaconMaker, userAddress)
}

In your case since Farm will create BaconMaker on demand, you do not have to deploy BaconMaker from the deploy scripts.

There's no general solution that fit all situations. Sometimes you create a single contract that will deploy child contracts. Also you can deploy several contracts and add them to a register after deployment, so they can communicate with each other.

A single contract is easiest, but you are bound by the block gas limit. Having several contracts is more complex because it no easy to communicate between them and you have to be more careful with the organization.

Best Answer

Related Solutions

[Ethereum] How to pass constructor parameters to a contract using Truffle

[Ethereum] truffle migrate: How to deploy a contract whose constructor takes a parameter

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