Creating Ethereum Contracts (go ethereum)

Question

Trying to follow the wiki example for go ethereum to create a basic contract: https://github.com/ethereum/go-ethereum/wiki/Contracts-and-Transactions

Everything seems to work until I get down until the last line:

source = "contract test { function multiply(uint a) returns(uint d) { return a * 7; } }"
contract = eth.compile.solidity(source).test
primaryAddress = eth.accounts[0]

# **Problems start here **
MyContract = eth.contract(abi);
contact = MyContract.new(arg1, arg2, ...,{from: primaryAddress, data: evmCode})

What is the "abi" argument for the eth.contract method? Also, what would I put in the "evmCode" argument? In this particular example, seems like I would put in an integer for "arg1" but not sure what the full example should look like.

Answer 1

ABI is representation of smart contract that can be read using java script .To read the data from a deployed contract account in etherum , you'll need some extra details like abi.

Steps to get abi of any smart contract:

1.Each contract has contract hash address like this:0x0D8775F648430679A709E98d2b0Cb6250d2887EF

2.Go to etherscan.io and search your contract address hash in search bar and you will get contract.

3.In contract go to code and there you can find this abi

can check this link to find abi