Function decode_calldata 

pub async fn decode_calldata(
    input: &str,
    contract_source: Option<&ContractSource>,
    http_client: &Client,
) -> DecodedCall

Decode transaction input data using available sources.

Resolution order:

1. ABI from verified source (most accurate)
2. OpenChain/Samczsun signature database
3. 4byte.directory
4. Raw selector fallback