Deploying a Smart Contract

[heysourin]

What is the difference among these 3, anyone please explain?

1. const contract = new ethers.Contract(contractAddress, contractABI, provider);

2. const contract = await ethers.getContractFactory("contractName");

3. const contractFactory = new ethers.ContractFactory(abi, binary, wallet);

[alymurtazamemon]

@heysourin These are all the function of ethers library that returns the instance of smart contract, but first you should know that Contract method we use for contracts that are already deployed on the blockchain, using the first line we can get the contract by giving its address, abi and provider for it.

The second line returns the ContractFactory instance that we can use to create a new instance for our smart contract, here that contract's JSON file should be available inside the artifacts folder.

The thrid line same returns the ContractFactory instance but here we have to give abi, binary and wallet.

[heysourin]

Thank you. But I dont understand what you mean. Did you mean 1st and 3rd line are same?

[alymurtazamemon]

@heysourin 2nd and 3rd return the ContractFactory instance.

[heysourin]

what is contractFactory?