Whitepaper - Ethereum Classic With Cover

Ethereum Classic Documentation, Release 0.1
> admin.setSolc("/usr/local/bin/solc")
solc, the solidity compiler commandline interface
Version: 0.2.2-02bb315d/.-Darwin/appleclang/JIT linked to libethereum-1.2.0-8007cef0/.-Darwin/appl
path: /usr/local/bin/solc
Compiling a simple contract
Let’s compile a simple contract source:
> source = "contract test { function multiply(uint a) returns(uint d) { return a * 7; } }"
This contract offers a single method multiply which is called with a positive integer a and returns a * 7.
You are ready to compile solidity code in the geth JS console using eth.compile.solidity():
> contract = eth.compile.solidity(source).test
{
code: '605280600c6000396000f3006000357c010000000000000000000000000000000000000000000000000000000
info: {
language: 'Solidity',
languageVersion: '0',
compilerVersion: '0.9.13',
abiDefinition: [{
constant: false,
inputs: [{
name: 'a',
type: 'uint256'
} ],
name: 'multiply',
outputs: [{
name: 'd',
type: 'uint256'
} ],
type: 'function'
} ],
userDoc: {
methods: {
}
},
developerDoc: {
methods: {
}
},
source: 'contract test { function multiply(uint a) returns(uint d) { return a * 7; } }'
}
}
Note: The compiler is also available via RPC and therefore via web3.js to any in-browser Ðapp connecting to
geth via RPC/IPC.
The following example shows how you interface geth via JSON-RPC to use the compiler.
$ geth --datadir ~/eth/ --loglevel 6 --logtostderr=true --rpc --rpcport 8100 --rpccorsdomain '*' -
$ curl -X POST --data '{"jsonrpc":"2.0","method":"eth_compileSolidity","params":["contract test {
The compiler output for one source will give you contract objects each representing a single contract. The actual
return value of eth.compile.solidity is a map of contract name to contract object pairs. Since our contract’s
name is test, eth.compile.solidity(source).test will give you the contract object for the
test contract containing the following fields:
code The compiled EVM bytecode
1.7. Contracts and Transactions 81