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Tagged with delegatecall contract-development
10 questions with no upvoted or accepted answers
3
votes
0
answers
705
views
Anything like a static delegatecall from a view function?
let's say there are two contracts A and B, where A calls methods in B. I understand that A can modify and read storage in B with B.call() and B.staticcall(), ie. A can execute B's methods in the ...
- 861
1
vote
0
answers
224
views
How to manually generate calldata
Here's my code snippet:
function getCalldata(string calldata _func, string calldata _param1, uint256 _param2) public pure returns (bytes memory) {
return abi.encodeWithSignature(_func, _param1,...
- 31
1
vote
0
answers
94
views
How dangerous is this: number of contracts contain a function like "approveandcall" which lets anyone call any contract (some thoughts?)
The most common implementation is as follows:
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(...
- 479
0
votes
1
answer
162
views
Delegatecall failing 'could not coalesce error'
I'm trying to set a message to my Contract setmsg through a proxy contract using delegatecall.Using hardhat.
getting this error:
error: {
code: -32603,
message: "Error: VM Exception ...
0
votes
1
answer
39
views
How to build a 3 contract structure with delegatecall
I'm looking for help to build an intermediate contract using delegatecall. My challenge would be with 3 contracts.
I need contract A to be the owner of Contract B, and contract B to have a ...
0
votes
0
answers
244
views
EOA delegating call authority to a contract to interact with another contract
Actually, I want my contract (say A) to interact with a project's contract (say B).
But, contract B's author has restricted calls by any contract. So with this, only one option is left i.e. an EOA ...
- 219
0
votes
1
answer
835
views
delegateCall in Solidity understanding case
pragma solidity ^0.8.10;
/*
HackMe is a contract that uses delegatecall to execute code.
It it is not obvious that the owner of HackMe can be changed since there is no
function inside HackMe to do so....
- 3
0
votes
0
answers
265
views
How does DELEGATECALL behave when calling other contracts?
I am trying to make a Parent-Contract which has a function which spends ERC-20 Tokens. I want to call this function from different Child-Contracts (which are deployed independently) using Delegatecall....
- 35
0
votes
0
answers
46
views
Does delegatecall() use only the calling function?
Let me explain with the code:
contract A {
function f() public {
[...]
g();
}
function g() private {
[...]
}
}
contract B {
A a;
function delegateA() public {
(bool success, ) = address(...
- 1
0
votes
2
answers
967
views
How to use Role-Based Access Control via Proxy?
I have a PermissionsManager contract that uses OpenZeppelin's Role-Based Access Control (RBAC) template as a base. Currently function modifiers in my app call PermissionsManager directly to check for ...
- 113