估算 ERC20 传输的气体

Question

I'd like to estimate the gas of a simple ERC20 transfer between two addresses. The web3.js docs on estimateGas are admittedly confusing:

// using the callback
myContract.methods.myMethod(123).estimateGas({gas: 5000000}, function(error, gasAmount){
    if(gasAmount == 5000000)
        console.log('Method ran out of gas');
});

The myMethod(123) is what I find confusing. What is that for? The following is what I'm currently thinking, but I'm getting TypeError: contract.methods.send is not a function . What should I substitute for myMethod(123) ?

  try {
    await contract.methods
      .send("0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe")
      .estimateGas({ gas: 60000 }, (error, gasAmount) => {
        return gasAmount;
      });
  } catch (err) {
    console.log(err);
  }

Answer 1

send() refers to a contract method called send . You do not have send in your Solidity Contract source code.

Instead, try contract.methods.myMethod.send

Answer 2

A bit late, but you need to look for the function in the smartcontract you want to call and replace myMethod(123) for the function in the contract you are calling.

For example, if you are working with the pancakeswap contract and check in the code the function function deposit(uint256 _pid, uint256 _amount) public {...} (line 1674), you will need to do this:

const estimatedGas = await contract.methods.deposit(123, 0).estimateGas({from: "0x345})

You need to pass the args to deposit in order to make it work.