Function calldata 

pub fn calldata() -> Result<Vec<u8>>

Returns the raw calldata (function selector + arguments).

Calldata format:

• Bytes 0-3: Function selector (4 bytes)
• Bytes 4+: Encoded arguments

Returns

A Vec<u8> containing the complete calldata.

Example

let calldata = context::calldata()?;
let selector = abi::selector(&calldata)?;
 
if selector == abi::selector_of("transfer") {
    let to = abi::read_account(&calldata, 4)?;
    let amount = abi::read_u64(&calldata, 36)?;
    // Handle transfer...
}