geth console mining - how to find when a contract is mined

Question

I created a private blockchain console with an unlocked account.

I have a simple contract, simpleContract.sol

pragma solidity ^0.4.0;

contract SimpleStorage {
  uint storedData;

  function set(uint x) {
    storedData = x;
  }

  function get() constant returns (uint) {
    return storedData;
  }
}

It was made into a js file using

echo "var simpleOutput=`solc --optimize --combined-json abi,bin,interface simpleContract.sol`" > simpleStorage.js

I load my contract in the console using

loadScript("simpleStorage.js")
var simpleStorageContract = eth.contract(JSON.parse(simpleOutput.contracts["simpleContract.sol:SimpleStorage"].abi));
var simpleStorage = simpleStorageContract.new(   {     from: eth.accounts[0],      data: "0x" + simpleOutput.contracts["simpleContract.sol:SimpleStorage"].bin,      gas: '47000'   },  function (e, contract) { if(!e) {    if(!contract.address) {      console.log("Contract transaction send: TransactionHash: " + contract.transactionHash + " waiting to be mined...");    } else {      console.log("Contract mined! Address: " + contract.address);      console.log(contract);    }  }})

I see

Contract transaction send: TransactionHash: 0x0f01f04f0e266cdca62479413bf17d65d38ef0b497dcbe9e9232451c994892a0 waiting to be mined...

When I start the miner with

miner.setEtherbase(eth.accounts[0])
miner.start(4)

It prints

INFO [07-01|18:22:03] Updated mining threads threads=4

INFO [07-01|18:22:03] Transaction pool price threshold updated price=18000000000

INFO [07-01|18:22:03] Starting mining operation

INFO [07-01|18:22:03] Commit new mining work number=3062 txs=0 uncles=0 elapsed=309.753µs

INFO [07-01|18:22:06] Successfully sealed new block number=1 hash=a73c27…d68bae

INFO [07-01|18:22:06] 🔨 mined potential block number=2 hash=a73c27…d68bae

INFO [07-01|18:22:06] Commit new mining work number=3 txs=0 uncles=0 elapsed=126.412µs

INFO [07-01|18:22:08] Successfully sealed new block number=4 hash=577497…34db4e

How can I find when my contract will be mined? I was under the impression that I could find the block number using

eth.getTransaction

Any solutions?

Answer 1

use the command web3.eth.getTransaction(transactionHash [, callback]) This will return in what block your transaction was mined or null if it's still pending.

https://github.com/ethereum/wiki/wiki/JavaScript-API#web3ethgettransaction

If get Transaction return 'null' it mean the transactionHash is not mined. You can check local pending transactions with "eth.pendingTransactions"

Answer 2

You can use getTransactionReceipt to check if a transaction was mined.

Answer 3

I wrote a tutorial doing the same thing as you did.
https://medium.com/@tina26919742/a-complete-guide-on-building-a-smart-contract-on-a-private-net-in-ethereum-726851c7c044
But I see the contract is mined soon after miner.start (just a few seconds)
Can you provide more details on how you set up your private blockchain?

You can also append else console.log(e) to your callback function to see what happened.