63 - Calldata
Calldata is a read-only byte-addressable space where the data parameter of a transaction or call is held.
This is accessed with CALLDATASIZE/CALLDATALOAD/CALLDATACOPY instructions.
- Data Parameters
- Txs & Message Calls
- Read-only
- Byte-addressable
- Three Instructions -> CALLDATASIZE, CALLDATALOAD, CALLDATACOPY