EVM.lua

This project aims to implement a fully compliant EVM in Lua scripting language. It provides scripts to bind it to a Redis database, enabling it to run EVM functions at scale.

Installation

1. Install Lua, the scripting language. brew install lua on Mac.
2. Install luarocks, a package manager for Lua: brew install luarocks
3. Install Redis and run redis-server to start the db.
4. Run ./load.sh to load evm.lua script into Redis, with some test data.

To-dos:

• Create and deploy Lua functions that interprets EVM bytecode
• Feed account storage based on initial list and block number
• Implement basic benchmark scripts
• Nested call context (CALL/CALLCODE/DELEGATECALL/STATICCALL/CREATE/CREATE2)
• Gas metering (per-opcode, shared call-tree pool, configurable GAS_CAP, default 8M)

Opcodes implemented: 149/149

00✅	01✅	02✅	03✅	04✅	05✅	06✅	07✅	08✅	09✅	0A✅	0B✅
10✅	11✅	12✅	13✅	14✅	15✅	16✅	17✅	18✅	19✅	1A✅	1B✅	1C✅	1D✅
20✅
30✅	31✅	32✅	33✅	34✅	35✅	36✅	37✅	38✅	39✅	3A✅	3B✅	3C✅	3D✅	3E✅	3F✅
40✅	41✅	42✅	43✅	44✅	45✅	46✅	47✅	48✅	49✅	4A✅
50✅	51✅	52✅	53✅	54✅	55✅	56✅	57✅	58✅	59✅	5A✅	5B✅	5C✅	5D✅	5E✅	5F✅
60✅	61✅	62✅	63✅	64✅	65✅	66✅	67✅	68✅	69✅	6A✅	6B✅	6C✅	6D✅	6E✅	6F✅
70✅	71✅	72✅	73✅	74✅	75✅	76✅	77✅	78✅	79✅	7A✅	7B✅	7C✅	7D✅	7E✅	7F✅
80✅	81✅	82✅	83✅	84✅	85✅	86✅	87✅	88✅	89✅	8A✅	8B✅	8C✅	8D✅	8E✅	8F✅
90✅	91✅	92✅	93✅	94✅	95✅	96✅	97✅	98✅	99✅	9A✅	9B✅	9C✅	9D✅	9E✅	9F✅
A0✅	A1✅	A2✅	A3✅	A4✅
F0✅	F1✅	F2✅	F3✅	F4✅	F5✅					FA✅			FD✅	FE✅	FF✅

Install redis-cli on amazon linux 2

sudo yum install wget -y
sudo yum install tcl -y
sudo yum install gcc -y
sudo yum install centos-release-scl -y
sudo yum install devtoolset-9-gcc devtooset-g-gcc-c++ devtoolset-9-binutils -y
sudo yum install openssl-devel* -y

Reference links

• Lua programming guide
• EVM reference
• Official EVM state tests
• Testing local functions

Use Redis triggers to do garbage collection: https://redis.io/docs/interact/programmability/triggers-and-functions/examples/

EVM.init should support:

• new attributes: calldata and depth, starting at 0/1 for each new CALL opcode-type, instantiate a new EVM.init, passing arguments.
• RETURN should return data from memory, kill the execution context branch. decrement depth. If depth == top depth, return function to external

Running tests

cd tests fswatch -o ../ | xargs -n1 -I{} ./test-arithmetic.sh