batcher_payment_service.rs

use std::sync::Arc;

use ethers::{core::k256::ecdsa::SigningKey, prelude::*};

use crate::common::errors::VerificationError;

abigen!(
    BatcherPaymentServiceContract,
    "abi/BatcherPaymentService.json"
);

pub type BatcherPaymentService = BatcherPaymentServiceContract<Provider<Http>>;

pub type SignerMiddlewareT = SignerMiddleware<Provider<Http>, Wallet<SigningKey>>;
pub type BatcherPaymentServiceWithSigner = BatcherPaymentServiceContract<SignerMiddlewareT>;

pub async fn batcher_payment_service(
    provider: Provider<Http>,
    contract_address: H160,
) -> Result<BatcherPaymentService, VerificationError> {
    let client = Arc::new(provider);

    // Verify that the contract has code at the given address
    let code = client
        .get_code(contract_address, None)
        .await
        .map_err(|e| VerificationError::EthereumProviderError(e.to_string()))?;
    if code.is_empty() {
        return Err(VerificationError::EthereumNotAContract(contract_address));
    }

    Ok(BatcherPaymentService::new(contract_address, client))
}