Web3j how to get transaction status

Question

I am using web3j to query the Ethereum blockchain. Now I want to check if a transaction was mined or just sent to the network. How can I achieve this?

Answer 1

You can consider using web3.eth.getTransactionReceipt(hash [, callback]).

It will return null for pending transactions and an object if the transaction is successful.

Answer 2

/**
 * 通过hash查询交易状态，处理状态。成功success，失败fail，未知unknown
 * @param hash
 * @return
 */
public String txStatus(String hash){
    if(StringUtils.isBlank(hash)) {
        return STATUS_TX_UNKNOWN;
    }
    try {
        EthGetTransactionReceipt resp = web3j.ethGetTransactionReceipt(hash).send();
        if(resp.getTransactionReceipt().isPresent()) {
            TransactionReceipt receipt = resp.getTransactionReceipt().get();
            String status = StringUtils.equals(receipt.getStatus(), "0x1") ?
                    "success" : "fail";
            return status;
        }
    }catch (Exception e){
        log.info("txStatusFail {}", e.getMessage(), e);
    }
    return "hash_unknown";
}

Answer 3

As mentioned before, you can use web3.eth.getTransactionReceipt(hash [, callback]) It will return the object with status. It will be false for unsuccessful transactions.

Answer 4

Use org.web3j.protocol.core.Ethereum ethGetTransactionReceipt function to get status using hash

public Boolean getTransactionStatus(Web3j web3j, String transactionHash) throws Exception{
                    
        Optional<TransactionReceipt> receipt = null;
        Boolean status=null;
                    
        try{ 
            receipt = web3j.ethGetTransactionReceipt(transactionHash).send().getTransactionReceipt();
            if(receipt.isPresent())
               status = receipt.get().isStatusOk();      
         }catch(IOException e){
            throw new Exception(e);
         }
         return status;
}