zenith

An implementation of the Ethereum virtual machine in pure Zig.

Project status

• Execute basic EVM bytecode
• Support EVMC interface
• Support all Ethereum opcodes (currently: 19 of 144 supported)
• Support precompiled contracts
• Run official Ethereum tests

Scope

For now, this is a just-for-fun experiment to learn more about Zig and Ethereum.

Run VM

Run with maximum performance:

$ echo'60015f526001601ff3'| xxd -r -p | zig build run -Doptimize=ReleaseFast
EVM gas used: 17
execution time: 36.685µs
0x01

Run in debug mode:

$ echo'60015f526001601ff3'| xxd -r -p | zig build run
debug: PUSH1 0x01
debug: Stack: push 0x01
debug: Gas consumed: 3
debug: ---
debug: PUSH0
debug: Stack: push 0x00
debug: Gas consumed: 5
debug: ---
debug: MSTORE
debug: Stack: pop 0x00
debug: Stack: pop 0x01
debug: Memory: Writing value=0x1 to memory offset=0
debug: Gas consumed: 11
debug: ---
debug: PUSH1 0x01
debug: Stack: push 0x01
debug: Gas consumed: 14
debug: ---
debug: PUSH1 0x1f
debug: Stack: push 0x1f
debug: Gas consumed: 17
debug: ---
debug: RETURN
debug: Stack: pop 0x1f
debug: Stack: pop 0x01
debug: Memory: reading size=1 bytes from offset=31
debug: Return value: 0x01
debug: Gas consumed: 17
debug: ---
EVM gas used: 17
execution time: 611.780µs
0x01

Run unit tests

zig build test --summary all