Transfer token

transfer token from miner 2 on Geth console by contract object

> eth.accounts
["0x4d0362700bcdc69e2e4e083c3f098ca55efd1119"]
> var contract = web3.eth.contract(abi)
undefined
> var instance = contract.at('0xf13c9660190749124ad90c8defc77cc6c5d36494');
undefined

> instance.symbol()
"YEN"

> instance.balanceOf('0xaeF72A6461e5392e9fa1537372b98701780a1819')
0

> instance.transfer('0xaeF72A6461e5392e9fa1537372b98701780a1819', web3.toWei(999, 'ether'))
Error: invalid address
    at web3.js:3930:15
    at web3.js:3756:20
    at web3.js:5025:28
    at map (<native code>)
    at web3.js:5024:12
    at web3.js:5050:18
    at web3.js:5075:23
    at web3.js:4137:16
    at apply (<native code>)
    at web3.js:4223:16

> instance.transfer('0xaeF72A6461e5392e9fa1537372b98701780a1819', web3.toWei(999, 'ether'), { from: eth.coinbase })
INFO [12-25|11:16:16] Submitted transaction                    fullhash=0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031 recipient=0xf13C9660190749124AD90C8dEfC77cC6c5D36494
"0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031"

> instance.balanceOf('0xaeF72A6461e5392e9fa1537372b98701780a1819')
999000000000000000000

> eth.getTransaction("0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031")
{
  blockHash: "0xa05f41a144e500df9d235b483fa8112df706b44fbcea1f40bdfd2dee7fde9722",
  blockNumber: 44,
  from: "0x4d0362700bcdc69e2e4e083c3f098ca55efd1119",
  gas: 90000,
  gasPrice: 18000000000,
  hash: "0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031",
  input: "0xa9059cbb000000000000000000000000aef72a6461e5392e9fa1537372b98701780a181900000000000000000000000000000000000000000000003627e8f712373c0000",
  nonce: 8,
  r: "0x5972ba41a88e662aca23d3324aa73244226a1f40b7a55861fab77222a49f6935",
  s: "0x1ad21dc1f96e288fd15284376ed4ee298363e4954fe41468dfdf232bfdca712",
  to: "0xf13c9660190749124ad90c8defc77cc6c5d36494",
  transactionIndex: 0,
  v: "0x11ba9",
  value: 0
}

> eth.getTransactionReceipt("0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031")
{
  blockHash: "0xa05f41a144e500df9d235b483fa8112df706b44fbcea1f40bdfd2dee7fde9722",
  blockNumber: 44,
  contractAddress: null,
  cumulativeGasUsed: 52111,
  from: "0x4d0362700bcdc69e2e4e083c3f098ca55efd1119",
  gasUsed: 52111,
  logs: [{
      address: "0xf13c9660190749124ad90c8defc77cc6c5d36494",
      blockHash: "0xa05f41a144e500df9d235b483fa8112df706b44fbcea1f40bdfd2dee7fde9722",
      blockNumber: 44,
      data: "0x00000000000000000000000000000000000000000000003627e8f712373c0000",
      logIndex: 0,
      removed: false,
      topics: ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x0000000000000000000000004d0362700bcdc69e2e4e083c3f098ca55efd1119", "0x000000000000000000000000aef72a6461e5392e9fa1537372b98701780a1819"],
      transactionHash: "0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031",
      transactionIndex: 0
  }],
  logsBloom: "0x00000200000000000000000500000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000400000000000000000000000000000000000000000000000000000000000000001000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000002000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000",
  root: "0x0fc99e552cbeb92d44d8986a81631dabe3503c35a4eee7330f91d02832c57a1b",
  to: "0xf13c9660190749124ad90c8defc77cc6c5d36494",
  transactionHash: "0x4a1d5b4de007e5232962ebd63976d24290295b6e00189b9a15a928bb17a47031",
  transactionIndex: 0
}

using send raw transaction of JSON-RPC API

First, I have to hash the transfer(address _to, uint256 _value) and then take first ten letters to be the method Id.

> web3.sha3('transfer(address,uint256)').substring(0,10)
"0xa9059cbb"

And prefix to address with zero, hex the value.

> web3.toHex(web3.toWei(2.345, "ether"))
"0x208b1d135e4a8000"

Then append them to method id, to makes the input data.

static final String PLACEHOLDER = "000000000000000000000000";

String TRANSFER = "0xa9059cbb";

public static byte[] makeInputDataForTransferMethod(@NonNull String toAddress, @NonNull BigInteger valueInWei) {
  final String hexWithoutPrefix0x = removePrefix0x(toAddress);
  final String valueHaxWithoutPrefix0x = prefix0In64Digital(toHexWithoutPrefix0x(valueInWei));
  return ByteString.decodeHex(removePrefix0x(TRANSFER) + PLACEHOLDER + hexWithoutPrefix0x + valueHaxWithoutPrefix0x).toByteArray();
}

Second, I have to sign below transaction.

{
  "chain": 36291,
  "nonce": 2,
  "from": "0xaeF72A6461e5392e9fa1537372b98701780a1819",
  "to": "0xf13C9660190749124AD90C8dEfC77cC6c5D36494",
  "gas": 60000,
  "gasPrice": 20000000000,
  "value": 0,
  "input": "0xa9059cbb00000000000000000000000088dd6b191d4bca6b059dd35ac0cffb2ffd072d62000000000000000000000000000000000000000000000000208b1d135e4a8000"
}

@NonNull
private Transaction makeSignedTxForTransferToken(@NonNull String password, @IntRange(from = 0) long nonce, @NonNull String toAddress, long gasLimit, long gasPrice, @NonNull BigInteger amount)
throws Exception {
  final Transaction tx = Geth.newTransaction(
    nonce,
    new Address(contractAddress),
    new BigInt(0),
    new BigInt(gasLimit),
    new BigInt(gasPrice),
    makeInputDataForTransferMethod(toAddress, amount)
  );
  unlock(password);
  final Transaction result = keyStore.signTx(getFirstAccount(), tx, new BigInt(networkId));
  lock();
  return result;
}

Then getting the RLP encoded transaction by below Java program.

@NonNull
private String makeSignedRlpTxHex(@NonNull Transaction signedTx) throws Exception {
  return PREFIX_HEX + ByteString.of(signedTx.encodeRLP()).hex();
}

Finally, doing the HTTP POST request with below body.

• request

  {
      "jsonrpc":"2.0",
      "method":"eth_sendRawTransaction",
      "params":["0xf8ac028504a817c80082ea6094f13c9660190749124ad90c8defc77cc6c5d3649480b844a9059cbb00000000000000000000000088dd6b191d4bca6b059dd35ac0cffb2ffd072d62000000000000000000000000000000000000000000000000208b1d135e4a800083011ba9a0daf4a5ea69c253de73bee8dc39ac9d1bf671feba59a54773841ed77552ee3df5a065ee2c9f6ea2014efa19d5998bb61b3a88cd358d798046dc5ef5c9b4fdaa7a78"],
      "id":63
  }
  

• response

  {
      "jsonrpc": "2.0",
      "id": 63,
      "result": "0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc"
  }
  

• miner 2 console

  > INFO [01-02|16:14:29] Submitted transaction                    fullhash=0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc recipient=0xf13C9660190749124AD90C8dEfC77cC6c5D36494
  
  > INFO [01-02|16:17:42] Starting mining operation 
  INFO [01-02|16:17:42] Commit new mining work                   number=110 txs=1 uncles=0 elapsed=3.189ms
  
  > eth.getTransaction("0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc")
  {
    blockHash: "0x5383b71065dadf8fb7b91bdecf65cefd771f0ae4487e2d559fece25e6e011bd4",
    blockNumber: 110,
    from: "0xaef72a6461e5392e9fa1537372b98701780a1819",
    gas: 60000,
    gasPrice: 20000000000,
    hash: "0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc",
    input: "0xa9059cbb00000000000000000000000088dd6b191d4bca6b059dd35ac0cffb2ffd072d62000000000000000000000000000000000000000000000000208b1d135e4a8000",
    nonce: 2,
    r: "0xdaf4a5ea69c253de73bee8dc39ac9d1bf671feba59a54773841ed77552ee3df5",
    s: "0x65ee2c9f6ea2014efa19d5998bb61b3a88cd358d798046dc5ef5c9b4fdaa7a78",
    to: "0xf13c9660190749124ad90c8defc77cc6c5d36494",
    transactionIndex: 0,
    v: "0x11ba9",
    value: 0
  }
  
  > eth.getTransactionReceipt("0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc")
  {
    blockHash: "0x5383b71065dadf8fb7b91bdecf65cefd771f0ae4487e2d559fece25e6e011bd4",
    blockNumber: 110,
    contractAddress: null,
    cumulativeGasUsed: 37111,
    from: "0xaef72a6461e5392e9fa1537372b98701780a1819",
    gasUsed: 37111,
    logs: [{
        address: "0xf13c9660190749124ad90c8defc77cc6c5d36494",
        blockHash: "0x5383b71065dadf8fb7b91bdecf65cefd771f0ae4487e2d559fece25e6e011bd4",
        blockNumber: 110,
        data: "0x000000000000000000000000000000000000000000000000208b1d135e4a8000",
        logIndex: 0,
        removed: false,
        topics: ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x000000000000000000000000aef72a6461e5392e9fa1537372b98701780a1819", "0x00000000000000000000000088dd6b191d4bca6b059dd35ac0cffb2ffd072d62"],
        transactionHash: "0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc",
        transactionIndex: 0
    }],
    logsBloom: "0x00000200000000000000000100000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000010000000000040040000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000002000000000000000000000000000002000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000",
    root: "0xdcf34557c3394cc93a8c4dba07613db353f8e496b18506d3d99cee787e1059c5",
    to: "0xf13c9660190749124ad90c8defc77cc6c5d36494",
    transactionHash: "0x7f1d6a78768486177360b19f2fdcc5cfcb1663030c64f55a832700c5fe27abcc",
    transactionIndex: 0
  }
  

RLP of ethereum Wiki

Block#encodeRLP()

eth_sendRawTransaction

using Geth mobile SDK

• GoEthereum.java

  import org.ethereum.geth.Transaction;
  
  public class GoEthereum implements Ethereum {
  
    public boolean transferToken(@NonNull String password, @NonNull Address toAddress, long amount, long gasLimit, long gasPrice) {
      try {
        unlock(password);
        new TokenTransfer(contractAddress, abi, getAccount(), ethClient, ethContext, new MySigner(keyStore, networkId))
          .sendTransaction(password, toAddress, amount, gasLimit, gasPrice);
        lock();
        return true;
      } catch (Exception e) {
        e.printStackTrace();
      }
      return false;
    }
  }
  

• TokenTransfer.java

  import org.ethereum.geth.Account;
  import org.ethereum.geth.Address;
  import org.ethereum.geth.BigInt;
  import org.ethereum.geth.BoundContract;
  import org.ethereum.geth.Context;
  import org.ethereum.geth.Geth;
  import org.ethereum.geth.Interface;
  import org.ethereum.geth.Interfaces;
  import org.ethereum.geth.Signer;
  import org.ethereum.geth.TransactOpts;
  import org.ethereum.geth.Transaction;
  
  public class TokenTransfer {
  
    @TokenAddress
    @NonNull
    private final String contractAddress;
  
    @NonNull
    private final String abi;
  
    @NonNull
    private final Account account;
  
    @NonNull
    private final EthereumClient client;
  
    @NonNull
    private final Context context;
  
    @NonNull
    private final Signer signer;
  
    TokenTransfer(@TokenAddress @NonNull String contractAddress, @NonNull String abi, @NonNull Account account,
      @NonNull EthereumClient client, @NonNull Context context, @NonNull Signer signer) {
      this.contractAddress = contractAddress;
      this.abi = abi;
      this.account = account;
      this.client = client;
      this.account = account;
      this.context = context;
      this.signer = signer;
    }
  
    @NonNull
    public Transaction sendTransaction (@NonNull String password, @NonNull Address toAddress, long amount, long gasLimit, long gasPrice) {
      try {
        final long nonce = client.getPendingNonceAt(context, account.getAddress());
        final BoundContract boundContract = Geth.bindContract(contractAddress, abi, client);
  
        final TransactOpts transactOpts = new TransactOpts();
        transactOpts.setContext(context);
        transactOpts.setGasLimit(Geth.newBigInt(gasLimit));
        transactOpts.setGasPrice(Geth.newBigInt(gasPrice));
        transactOpts.setNonce(nonce);
        transactOpts.setFrom(account.getAddress());
        transactOpts.setSigner(signer);
  
        final Interface paramToAddress = Geth.newInterface();
        paramToAddress.setAddress(toAddress);
  
        final Interface paramAmount = Geth.newInterface();
        paramAmount.setBigInt(Geth.newBigInt(amount));
  
        final Interfaces params = Geth.newInterfaces(2);
        params.set(0, paramToAddress);
        params.set(1, paramAmount);
  
        return boundContract.transact(transactOpts, "transfer", params);
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
  }
  

• MySigner.java

  public class MySigner implements Signer {
    @NonNull
    private final KeyStore keyStore;
  
    @NonNull
    private final BigInt networkId;
  
    MySigner(@NonNull KeyStore keyStore, @IntRange(from = 0) int networkId) {
      this.keyStore = keyStore;
      this.networkId = Geth.newBigInt(networkId);
    }
  
    @NonNull
    @Override
    public Transaction sign(Address address, Transaction transaction) throws Exception {
      return keyStore.signTx(address, transaction, networkId);
    }
  }
  

Kin SDK core in GitHub

Nonce too low issue

• request

  {
    "jsonrpc":"2.0",
    "method":"eth_sendRawTransaction",
    "params":["0xf86b808223288275309488dd6b191d4bca6b059dd35ac0cffb2ffd072d6287038d7ea4c680008083011baaa02f5786edffdf79d5c67302e357cd674434d6e81b592180231fc5e030887e2e23a005d6102da7d01c725dc909a6306e97b750b4c9bdf846aa6d7b678c15cc2db12a"],
    "id":63
  }
  

• response

  {
    "jsonrpc": "2.0",
    "id": 63,
    "error": {
      "code": -32000,
      "message": "nonce too low"
    }
  }
  

Needs to increase the nonce.