How can I access a contract's fallback function via 'myContract.methods'?

Question

Web3.js documentation says here that the methods of a smart contract are available through:

1. The name: myContract.methods.myMethod
2. The name with parameters: myContract.methods['myMethod(uint256)']
3. The signature: myContract.methods['0x58cf5f10']

But how can I access the contract's fallback function, which has no name (and no parameters)?

Will the 2nd option work if I use myContract.methods['()']?

Is there a way to make the 1st option work?

Thank you!

Answer 1

Fallback functions are executed if a contract is called and no other function matches the specified function identifier, or if no data is supplied

so you can use the following:

send Transaction to the contract with the msg.value = 0 and it will automatically invoke the fallback function.

OR

call the contract using myContract.methods and provide the wrong or random function name or signature and it will execute the fallback function as it couldn't find the function with the same signature in the contract. (not tested)

Update (Tested on expanse network)

Tested the second option and it didn't work. As using random name in myContract.methods will return undefined because when web3js tries to find the function name in abi it returns empty. The reason being

other function in the abi have the name attribute and fallback doesn't have one

After that created a raw transaction with the data being empty and sent that transaction to the network which invoked the fallback function as expected.

And on trace_transaction it says reverted which the fallback function does in this particular case.