BlockChain-Solidity-Projects/07Factory.sol at master · BlockChain-Creativity/BlockChain-Solidity-Projects · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
/*
#Simple Bytecode Contract
Simple example of contract written in bytecode
 */

pragma solidity ^0.8.17;

contract Factory {
    event Log(address addr);

    // Deploys a contract that always returns 42
    function deploy() external {
        bytes memory bytecode = hex"69602a60005260206000f3600052600a6016f3";
        address addr;
        assembly {
            // create(value, offset, size)
            addr := create(0, add(bytecode, 0x20), 0x13)
        }
        require(addr != address(0));

        emit Log(addr);
    }
}

interface IContract {
    function getMeaningOfLife() external view returns (uint);
}

// https://www.evm.codes/playground
/*
Run time code - return 42
602a60005260206000f3

// Store 42 to memory
mstore(p, v) - store v at memory p to p + 32

PUSH1 0x2a
PUSH1 0
MSTORE

// Return 32 bytes from memory
return(p, s) - end execution and return data from memory p to p + s

PUSH1 0x20
PUSH1 0
RETURN

Creation code - return runtime code
69602a60005260206000f3600052600a6016f3

// Store run time code to memory
PUSH10 0X602a60005260206000f3
PUSH1 0
MSTORE

// Return 10 bytes from memory starting at offset 22
PUSH1 0x0a
PUSH1 0x16
RETURN
*/