stableswappy

Python package for Stableswap V1 modelling

Install

To install package:

> git clone https://github.com/defipy-devs/stableswappy
> pip install .

or

> pip install StableswapPy

Stableswap

• See test notebook for basic usage

from stableswappy import *

user_nm = 'user_test'

user_nm = 'user_test'

AMPL_COEFF = 2000 

amt_dai = 79566307.559825807715868071
decimal_dai = 18

amt_usdc = 81345068.187939
decimal_usdc = 6

amt_usdt = 55663250.772939
decimal_usdt = 6

dai = ERC20("DAI", "0xA0b", decimal_dai)
dai.deposit(None, amt_dai)

usdc = ERC20("USDC", "0xf93", decimal_usdc)
usdc.deposit(None, amt_usdc)

usdt = ERC20("USDT", "0xd7c", decimal_usdt)
usdt.deposit(None, amt_usdt)

sgrp = StableswapVault()
sgrp.add_token(dai)
sgrp.add_token(usdc)
sgrp.add_token(usdt)

sfactory = StableswapFactory("Pool factory", "0x2")
exchg_data = StableswapExchangeData(vault = sgrp, symbol="LP", address="0x011")
lp = sfactory.deploy(exchg_data)

Join().apply(lp, user_nm, AMPL_COEFF)
lp.summary()

OUTPUT:

Stableswap Exchange: DAI-USDC-USDT (LP)
Reserves: DAI = 79566307.55982581, USDC = 81345068.187939, USDT = 55663250.772939
Liquidity: 216573027.91811988

Swap

usdc_before = lp.get_reserve(usdc)
usdt_before = lp.get_reserve(usdt)

amt_tkn_in = 10000
tkn_in = usdc
tkn_out = usdt
res = Swap().apply(lp, tkn_in, tkn_out, user_nm, amt_tkn_in)
lp.summary()

print(f"{amt_tkn_in} {tkn_in.token_name} was swapped for {res['tkn_out_amt']} {tkn_out.token_name}")

OUTPUT:

Stableswap Exchange: DAI-USDC-USDT (LP)
Reserves: DAI = 79566307.55982581, USDC = 81355068.187939, USDT = 55653253.910191
Liquidity: 216573027.91811988

10000 USDC was swapped for 9996.862748 USDT

Swap

usdc_before = lp.get_reserve(usdc)
dai_before = lp.get_reserve(dai)

amt_tkn_in = 10000
tkn_in = usdc
tkn_out = dai
res = Swap().apply(lp, tkn_in, tkn_out, user_nm, amt_tkn_in)
lp.summary()

print(f"{amt_tkn_in} {tkn_in.token_name} was swapped for {res['tkn_out_amt']} {tkn_out.token_name}")

Stableswap Exchange: DAI-USDC-USDT (LP)
Reserves: DAI = 79556308.6645169, USDC = 81365068.187939, USDT = 55653253.910191
Liquidity: 216573027.91811988

10000 USDC was swapped for 9998.895308918858 DAI

License

Licensed under the Apache License, Version 2.0.
See LICENSE and NOTICE for details.
Portions of this project may include code from third-party projects under compatible open-source licenses.