Meteora Swaps

Demonstrates a solana program to execute two swap in sequence atomically in a transaction using pinocchio, we use meteoras DLMM program as the swap venue, it was inspired by this reply to the tweet https://x.com/deanmlittle/status/2025787879461634315?s=20 to actually compare the normal double CPI method with a method where we introspect the former top level swap instruction

Pattern A: Both Swaps
[Router]
  ├─> Swap A (CPI)
  │     └─> SwapProgram
  └─> Swap B (CPI)
        └─> SwapProgram

Pattern B: Introspect + 1 CPI
[Swap A top-level]   
  └─> SwapProgram x2
[Router]
  └─> Swap B (CPI)
        └─> SwapProgram

Build

From project root

cargo build-sbf

Generating IDL

This repository uses Shank for IDL generation.

Install the Shank CLI

cargo install shank-cli

Generate IDL

shank idl -r program -o idl
// OR
yarn generate-idl

Generating Clients

Ensure the IDL has been created or updated using the above IDL generation steps.

Install dependencies

yarn install

Run client generation script

yarn generate:clients

Running Tests

surfpool start in this directory to start the local surfpool validator, to install surfpool visit surfpool

Then to run the tests we run

yarn run test:1
yarn run test:2

Note

• Fixed base64ct cargo build-sbf build error by downgrading it https://solana.stackexchange.com/questions/23578/how-to-build-with-solana-program-3-0-0-cargo-build-sbf-3-0-6-fails-with-edition

Quick script to convert base58 address to hex

python3 -c "
import base64, struct

def b58decode(s):
    alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
    n = 0
    for c in s:
        n = n * 58 + alphabet.index(c)
    return n.to_bytes(32, 'big')

key = b58decode('LBUZKhRxPF3XUpBCjp4YzTKgLccjZhTSDM9YuVaPwxo')
print(', '.join(f'0x{b:02X}' for b in key))
"

Also for discriminators

python3 -c "
import hashlib
h = hashlib.sha256(b'global:swap2').digest()
print('Expected: ', ', '.join(f'0x{b:02X}' for b in h[:8]))
print('Got:      ', '0x41, 0x4B, 0x3F, 0x4C, 0xEB, 0x5B, 0x5B, 0x88')
print('Match:', h[:8] == bytes([0x41, 0x4B, 0x3F, 0x4C, 0xEB, 0x5B, 0x5B, 0x88]))
"