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Send Transaction

Step1: Generate Transaction​

val tx = Transaction(
  to, // To Address
  data, // Transaction Data
  value, // The value transferred to `To Address`
);

Step2: Get Fee Options and Consumption through simulateTransaction()​

tip

πŸ’‘ You need to call this method in a suspend function because it is an asynchronous method.

// data class SimulateResult(
//    var `isFeeRequired`: Boolean,
//    var `feeOptions`: List<FeeOption>,
// )

// data class FeeOption(
//    var `token`: String,
//    var `name`: String,
//    var `symbol`: String,
//    var `decimals`: UByte,
//    var `to`: String,
//    var `amount`: String,
//    var `error`: String?,
// )

val simulateRet = smartAccount.simulateTransaction(tx);

Step3: Validate Whether Fee is Sufficient​

// Create options which is used for sendTransaction
val sendTransactionOptions = SendingTransactionOptions(null)

// Token_CA: The contract address of the token you want to use as gasFee
// Example: Take USDC on Mumbai as gasFee
var Token_CA = "0x87F0E95E11a49f56b329A1c143Fb22430C07332a" 

if (simulateRet!!.isFeeRequired) {
    sendTransactionOptions.fee =
        simulateRet?.feeOptions?.find { it.token.lowercase() == Token_CA.lowercase() }
}
tip

Notice that if there is a transaction involving fee tokens, the validating result may not be accurate.

Step4: Select Fee Option and Send Transaction​

tip

πŸ’‘ You need to call this method in a suspend function because it is an asynchronous method.

val txHash = smartAccount.sendTransaction(tx, sendTransactionOptions)
val receipt = smartAccount.waitTransactionReceiptByHash(txHash!!, 2, ChainID.ETHEREUM_MAINNET, 60);