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1import EVM from 0xe467b9dd11fa00df
2
3transaction(hexEncodedTxs: [String], coinbase: String) {
4    execute {
5        let txs: [[UInt8]] = []
6        for tx in hexEncodedTxs {
7            txs.append(tx.decodeHex())
8        }
9
10        let txResults = EVM.batchRun(
11            txs: txs,
12            coinbase: EVM.addressFromString(coinbase)
13        )
14
15        // If at least one of the EVM transactions in the batch is either
16        // failed or successful, in other words not invalid, we let the
17        // Cadence transaction succeed.
18        for txResult in txResults {
19            if txResult.status == EVM.Status.failed || txResult.status == EVM.Status.successful {
20                return
21            }
22        }
23
24        // Otherwise, all EVM transactions are invalid txs and can't be
25        // executed (such as nonce too low).
26        // In this case, we fail the Cadence transaction with the error
27        // message from the first EVM transaction.
28        for txResult in txResults {
29            assert(
30                txResult.status == EVM.Status.failed || txResult.status == EVM.Status.successful,
31                message: "evm_error=".concat(txResult.errorMessage).concat("\n")
32            )
33        }
34    }
35}