New answers tagged evm
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Answering my own question.
So, I apparently missed the fact that the abi-encoding function follows the head-tail encoding mechanism. The abi-decoding function then keeps track of the parameter type- actually it checks if the data type has a predefined size, if not, then it treats the value in hand as a start position.
Here is a very clear pyethereum ...
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update @atomh33ls answer
use abi.encodePacked
pragma solidity ^0.6.0;
contract E {
uint256 public n;
address public sender;
function setN(uint256 _n) public {
n = _n;
sender = msg.sender;
}
}
contract D{
uint256 public n;
address public sender;
function callSetN(address _e,uint256 _n) ...
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Yes, it should be possible. But it is not as easy as it sounds. A contract is composed of two things runtime bytecode and internal state.
Runtime: It is not that hard to duplicate the runtime bytecode, with some EVM assembly knowledge. Perhaps someone has already done that in github.
State: On the other hand is more complicated since it depends on the ...
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It turns out this was a small issue with EthersJS.
The estimated gas is not input correctly. By manually defining the gas limit, it works:
myContract.address_to_addresses(<someAddress>, 0, { gasLimit: 60000 });
It's unclear why this is. If I set the gas limit to the actual cost of the function as defined in the abi (1654) then it fails - I have to set ...
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