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balancer-core

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Balancer on the EVM

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<h1 align=center><code>balancer</code></h1>

**Balancer** is an automated **portfolio manager**, **liquidity provider**, and **price sensor**.

Balancer turns the concept of an index fund on its head: instead of a paying fees
to portfolio managers to rebalance your portfolio, you collect fees from traders, who rebalance
your portfolio by following arbitrage opportunities.

Balancer is based on an N-dimensional invariant surface which is a generalization of the constant product formula described by Vitalik Buterin and proven viable by the popular Uniswap dapp.

## 🍂 Bronze Release 🍂

The *🍂Bronze Release🍂*  is the first of 3 planned releases of the Balancer Protocol. Bronze emphasizes code clarity for audit and verification, and does not go to great lengths to optimize for gas.

The *❄️Silver Release❄️* will bring many gas optimizations and architecture changes that will reduce transaction overhead and enable more flexibility for managed pools.

The *☀️Golden Release☀️* will introduce a curious new liquidity mechanism to the market.

## Documentation

The full documentation can be found at [https://docs.balancer.finance](https://docs.balancer.finance)

## Development

Most users will want to consume the ABI definitions for BFactory and BPool.

This project follows the standard Truffle project structure.

```
yarn compile   # build artifacts to `build/contracts`
yarn testrpc # run ganache
yarn test    # run the tests
```

Tests can be run verbosely to view approximation diffs:

```
yarn test:verbose
```

```
  Contract: BPool
    With fees
pAi
expected: 10.891089108910892)
actual  : 10.891089106783580001)
relDif  : 1.9532588879656032e-10)
Pool Balance
expected: 98010000000000030000)
actual  : 98010000001320543977)
relDif  : 1.3473294888276702e-11)
Dirt Balance
expected: 3921200210105053000)
actual  : 3921200210099248361)
relDif  : 1.480428360949332e-12)
Rock Balance
expected: 11763600630315160000)
actual  : 11763600630334527239)
relDif  : 1.6464292361378058e-12)
      ✓ exitswap_ExternAmountOut (537ms)
```

Complete API docs are available at [https://docs.balancer.finance/smart-contracts/api](https://docs.balancer.finance/smart-contracts/api)

balancer-core

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