Add support for BSC

Made the main token addresses configurable

.dockerignore

@@ -4,3 +4,4 @@ __pycache__
 reports
 Dockerfile
 heroku.yml
+.env

Dockerfile

@@ -6,6 +6,10 @@ WORKDIR /app
 
 RUN pip install -r requirements.txt
 
+ENV HOME /app
+
+COPY ./network-config.yaml $HOME/.brownie/network-config.yaml
+
 COPY . /app
 
 RUN brownie compile

app.py

@@ -8,7 +8,7 @@
 import os
 from brownie import project, network
 p = project.load()
-network.connect("mainnet")
+network.connect(os.environ.get('NETWORK', 'mainnet'))
 sys.modules["brownie"].interface = p.interface
 
 from scripts.utils import priceOf, priceOf1InchPair, priceOfUniPair

network-config.yaml

@@ -0,0 +1,25 @@
+live:
+  - name: Ethereum
+    networks:
+      - chainid: 1
+        explorer: https://api.etherscan.io/api
+        host: https://mainnet.infura.io/v3/$WEB3_INFURA_PROJECT_ID
+        id: mainnet
+        name: Mainnet (Infura)
+  - name: BSC
+    networks:
+      - chainid: 56
+        host: $BSC_RPC_ENDPOINT
+        id: bsc-mainnet
+        name: bsc-mainnet
+development:
+  - cmd: ganache-cli
+    cmd_settings:
+      accounts: 10
+      evm_version: istanbul
+      gas_limit: 12000000
+      mnemonic: brownie
+      port: 8545
+    host: http://127.0.0.1
+    id: development
+    name: Ganache-CLI

scripts/utils.py

@@ -1,12 +1,13 @@
+import os
 from brownie import interface
 from brownie.exceptions import ContractNotFound
 from datetime import datetime, timedelta
 from functools import lru_cache
 
-DAI = interface.IERC20("0x6b175474e89094c44da98b954eedeac495271d0f")
-WETH = interface.IERC20("0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2")
-USDT = interface.IERC20("0xdac17f958d2ee523a2206206994597c13d831ec7")
-USDC = interface.IERC20("0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48")
+DAI = interface.IERC20(os.environ.get('DAI_ADDRESS', "0x6b175474e89094c44da98b954eedeac495271d0f"))
+WETH = interface.IERC20(os.environ.get('WETH_ADDRESS', "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"))
+USDT = interface.IERC20(os.environ.get('USDT_ADDRESS', "0xdac17f958d2ee523a2206206994597c13d831ec7"))
+USDC = interface.IERC20(os.environ.get('USDC_ADDRESS', "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48"))
 
 @lru_cache
 def getFactory(router):