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73. Seahorse: Writing Solana Programs in Python

Pythonic syntax compiled to Anchor Rust.

1 min read2 questionsup to 50 XPtopic 73/100

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Seahorse allows developers to write Solana programs in Python. Under the hood, Seahorse parses Python AST and transpiles it into standard Anchor-compatible Rust code.

python
# Seahorse Python example
from seahorse.prelude import *

declare_id('Fg6P...sLnS')

class Calculator(Account):
    owner: Pubkey
    result: u64

@instruction
def init_calculator(owner: Signer, calc: Empty[Calculator]):
    calculator = calc.init(payer = owner, seeds = ['calculator', owner])
    calculator.owner = owner.key()
    calculator.result = 0

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Check your understanding

1. What does Seahorse do with Python smart contract code?
Transpiles Python AST into standard Anchor-compatible Rust codeRuns a Python interpreter on-chainCompiles Python to EVM bytecodeExecutes Python in WebAssembly
2. Does Seahorse require a Python runtime on the Solana blockchain?
No, it compiles down to native SBF bytecode via RustYes, it deploys CPython on-chainYes, it uses PyPyOnly on testnet

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