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I do not have the json interface as ABI, how can I construct the calldata?

This does not work because encodeFunctionCall does not accept string as method signature:

web3.eth.abi.encodeFunctionCall('upgradeToAndCall(address, bytes memory)', [arg1, arg2])

Does anyone know?

P.S: It's weird that encodeFunctionSignature accepts string as method signature

1 Answer 1

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Instead of encodeFunctionCalll, you can use function(parameters).encodeABI()

Check here: https://web3js.readthedocs.io/en/v1.2.11/web3-eth-contract.html#methods-mymethod-encodeabi

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