I am trying to deploy smart contract using web3j. My code is as follows:

    public String index() throws Exception {
        Web3j web3j = Web3j.build(new HttpService("https://rinkeby.infura.io/v3/2a42af3ce74e407cae9e20a7e7001ddb"));
        String walletId = "97a0987c270cd6cfa77972b83026eb56524857c5";
        String walletSource = "resources/testnet-keystore/UTC--2018-09-26T00-58-36.238000000Z--" + walletId + ".json";
        Credentials credentials = WalletUtils.loadCredentials("admin1234", walletSource);
        ProofOfExistence contract = ProofOfExistence.deploy(web3j, credentials, ProofOfExistence.GAS_PRICE,ProofOfExistence.GAS_LIMIT).send();;
           String contractAddress = contract.getContractAddress();
           return "Contract is deployed at address: " + contractAddress;

I have started my geth console.When i try running the contract. I get funds insufficient error.I am using spring boot to run my applications. Any help would be appreciated!!

  • 1
    Are you sure you have Ether in the account and that you are synced up to date? Commented Sep 26, 2018 at 16:56
  • if you can post the code of your smart contract, that would be better. Commented Sep 26, 2018 at 17:03
  • I used the following code to run geth "geth --rpcapi personal,db,eth,net,web3 --rpc --testnet --fast". How do i check Ether in the account and that you are synced up to date? @LauriPeltonen
    – aib92
    Commented Sep 26, 2018 at 17:05
  • my smart contract code is : pragma solidity ^0.4.15; // Proof of Existence contract, version 1 contract ProofOfExistence { bytes32 public proof; function notarize(string document) { proof = proofFor(document); } function proofFor(string document) constant returns (bytes32) { return sha256(document); } }
    – aib92
    Commented Sep 26, 2018 at 17:06

1 Answer 1


I had not funded my account with ether using rinkeby faucet. After funding account, it is giving me the expected output. thank you for the help!!

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