balancerpy

Python package for Balancer V2 modelling

Install

To install package:

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

or

> pip install BalancerPy

Balancer

• See test notebook for basic usage

from balancerpy import *

user_nm = 'user_test'

amt_dai = 10000000
denorm_wt_dai = 10

amt_eth = 67738.6361731024
denorm_wt_eth = 40

init_pool_shares = 100

dai = ERC20("DAI", "0x111")
dai.deposit(None, amt_dai)

weth = ERC20("WETH", "0x09")
weth.deposit(None, amt_eth)

bgrp = BalancerVault()
bgrp.add_token(dai, denorm_wt_dai)
bgrp.add_token(weth, denorm_wt_eth)

bfactory = BalancerFactory("WETH pool factory", "0x2")
exchg_data = BalancerExchangeData(vault = bgrp, symbol="LP", address="0x011")
lp = bfactory.deploy(exchg_data)

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

OUTPUT:

Balancer Exchange: DAI-WETH (LP)
Reserves: DAI = 10000000, WETH = 67738.6361731024
Weights: DAI = 0.2, WETH = 0.8
Pool Shares: 100

Swap (out-given-in)

amt_tkn_in = 10000
tkn_in = dai
tkn_out = weth

res = Swap(Proc.SWAPOUT).apply(lp, tkn_in, tkn_out, user_nm, amt_tkn_in)
lp.summary()

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

OUTPUT:

Balancer Exchange: DAI-WETH (LP)
Reserves: DAI = 10010000, WETH = 67721.75437414162
Weights: DAI = 0.2, WETH = 0.8
Pool Shares: 100

10000 DAI was swapped into 16.881798960778035 WETH

Swap (out-given-in)

amt_tkn_out = 20
tkn_out = weth
tkn_in = dai

res = Swap(Proc.SWAPIN).apply(lp, tkn_in, tkn_out, user_nm, amt_tkn_out)
lp.summary()

print(f"{amt_tkn_out} {tkn_out.token_name} was swapped into {res['tkn_in_amt']} {tkn_in.token_name}")

OUTPUT:

Balancer Exchange: DAI-WETH (LP)
Reserves: DAI = 9998136.750149786, WETH = 67741.75437414162
Weights: DAI = 0.2, WETH = 0.8
Pool Shares: 100

20 WETH was swapped into 11863.249850213939 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.