All Questions
Tagged with delegatecall calldata
10 questions
2
votes
0
answers
600
views
Solidity assembly code - calldatacopy, delegatecall
I have been trying to understand how assembly code works,spending lots of hours, but I could not.
Please help me
Basically, I am digging into a proxy contract, and I do not really understand ...
- 387
0
votes
1
answer
89
views
Events in Chained Fallback Function Cause VirtualMachineError
I’m working on an upgradeable contract that uses fallback functions with inline assembly delegatecall and call calls (using calldatacopy and returndatacopy) to route internal and external function ...
- 136
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
1
answer
268
views
Why does this call to DSProxy fail?
Take these two contracts, both deployed on Kovan and with the source code verified:
DSProxy: 0xa92Bed719071A4d33B0B348513E7e866a6ff6B3F
TargetContract: 0xE3CD2e7a628b57d3e50c5f7B921182f676721bDF
And ...
- 18.7k
1
vote
1
answer
746
views
pass storage through interface to library
Here is what am i doing:
There is a library, accept storage argument as parameter, then do some math and return the result.
And there is a contract to call the function in the library, and an extra ...
- 11
2
votes
0
answers
564
views
Proxy contract DELEGATECALL to pass a DYNAMIC array to a function in the target contract
I'm trying to get a Proxy contract to correctly do a delegatecall to a function in another 'target' contract. The problem is, that I need to pass a dynamic array as the parameter to this function.
Q: ...
1
vote
0
answers
117
views
delegatecall for Smart Contract versioning
I've a state variable
address public current;
which stores the address of the latest updated contract. This value can be modified with a function.
Then, I've a function of this kind
function ...
- 385
3
votes
2
answers
774
views
Solidity CALL and DELEGATECALL: messages and data format
I have some questions about Solidity CALL and DELEGATECALL. I have already read some related threads (link), but found no answers to my doubts.
1) Is there any difference in performing a CALL to a ...
- 133
1
vote
1
answer
740
views
Contract call from a contract from a contract?
As I understand it, it is possible for a contract to call another contract by using
othercontractaddress.call(gas_amount).value(eth amount)(tx data).
Or in this case sender -> contract A -> ...
- 155
2
votes
0
answers
718
views
Call vs Delegate Call call data format
I'm using both call and delegatecall within an assembly block and i've noticed that when issuing a call I need to provide 4 bytes (sig) + any arguments, whereas for delegatecall I need to provide 4 ...
- 443