In this deck we deploy contract using geth. We obtain ABI and Bytecode through compilation (which is done on Remix). After deploying the contract we can execute functions. A screen capture video is at the end of this deck.

1. 7. Use Geth to Deploy Contract
KC Tam
Reach KC on LinkedIn: https://www.linkedin.com/in/ktam1/

2. Objective
We will deploy contract on TestRPC using Geth in this
section.

3. Ethereum Network (the Giant Computer)
artifact
ABI
Bytecode
Review: Contract
Deployment
Deployed Contract
Bytecode
ABI
Contract
Address
Deploy
To deployed a contract we need the artifact,
1. Bytecode, and,
2. Application Binary Interface (ABI)

4. Obtain ABI from Compile Panel on Remix.
ABI
[{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"retVal","type":"uint
256"}],"payable":false,"stateMutability":"view","type":"function"},
{"constant":false,"inputs":[{"name":"x","type":"uint256"}],"name":"set","outputs":
[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

5. Obtain Bytecode from Compile Panel
on Remix.
Bytecode
"0x6060604052341561000f57600080fd5b60d38061001d6000396000f3006060604052600436106049576
000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806360fe
47b114604e5780636d4ce63c14606e575b600080fd5b3415605857600080fd5b606c600480803590602001
90919050506094565b005b3415607857600080fd5b607e609e565b6040518082815260200191505060405
180910390f35b8060008190555050565b600080549050905600a165627a7a723058209c766746a98a31b7
5a36be097d1ab14fdb59fc11fbc2c43b8a58201c864925fd0029"

6. First start TestRPC, and open another terminal accessing TestRPC through RPC
$ geth attach http://localhost:8545

7. Define variables abi and bytecode,
> abi = <abi>
> bytecode = <bytecode>

8. Deploy contract with new method. Note we need to specify account and gas to be spent in this deployment.
The deployed contract is stored in object simpleStorage.
> simpleStorage = eth.contract(abi).new({from: eth.accounts[0], data: bytecode, gas: 300000})

9. Now we can execute functions using object simpleStorage.
> simpleStorage.get()
> simpleStorage.set(100, {from: eth.accounts[0]})

10. Summary
We can use Geth to deploy and access contract on
TestRPC.
As good practice, we use both Remix and Geth client
working on TestRPC. As seen before, they can work on the
same deployed contract.