Deploy contract using another contract

Question

I've seen some example's, where the contract deploys other contract (e.g. this one), but is it possible to do so using binary of the contract? something like:

function deployContract(bytes contractsBin) { ... }

As far as I know there is no way to send transaction via contract, so RPC way is not an option.

Answer 1

Of course you can, you just have to rely on solidity assembly to do it.

Check out the create / create2 opcodes:

• create(v, p, s) - create new contract with code mem[p..(p+s)) and send v wei and return the new address
• create2(v, n, p, s) - create new contract with code mem[p..(p+s)) at address keccak256( . n . keccak256(mem[p..(p+s))) and send v wei and return the new address

You can even go ahead and save gas by "cloning" and existing contract. An example implementation can be found at: https://gist.github.com/holiman/069de8d056a531575d2b786df3345665