Function call

fendermint/eth/api/src/apis/eth.rs:703–735

Executes a new message call immediately without creating a transaction on the block chain.

(
    data: JsonRpcData<C>,
    Params((tx, block_id)): Params<(TypedTransactionCompat, et::BlockId)>,
)

/// Executes a new message call immediately without creating a transaction on the block chain.
pub async fn call<C>(
    data: JsonRpcData<C>,
    Params((tx, block_id)): Params<(TypedTransactionCompat, et::BlockId)>,
) -> JsonRpcResult<et::Bytes>
where
    C: Client + Sync + Send,
{
    let msg = to_fvm_message(tx.into())?;
    let is_create = msg.to == EAM_ACTOR_ADDR;
    let height = data.query_height(block_id).await?;
    let response = data.client.call(msg, height).await?;
    let deliver_tx = response.value;

    // Based on Lotus, we should return the data from the receipt.
    if deliver_tx.code.is_err() {
        // There might be some revert data encoded as ABI in the response.
        let (msg, data) = match decode_fevm_invoke(&deliver_tx) {
            Ok(h) => (deliver_tx.info, Some(h)),
            Err(e) => (
                format!("{}\nfailed to decode return data: {:#}", deliver_tx.info, e),
                None,
            ),
        };
        error_with_revert(ExitCode::new(deliver_tx.code.value()), msg, data)
    } else if is_create {
        let decoded = Vec::<u8>::from(decode_data(&deliver_tx.data)?);
        Ok(decoded.into())
    } else {
        let return_data = decode_fevm_invoke(&deliver_tx)
            .context("error decoding data from deliver_tx in query")?;
        Ok(return_data.into())
    }
}

/// Generates and returns an estimate of how much gas is necessary to allow the transaction to complete.
/// The transaction will not be added to the blockchain.