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web3-toolkit/scripts/utils/web3_wrapper.py

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+# -*- encoding: utf-8 -*-
+# This class implements an (ongoing) wrapper for web3 libs.
+# author: steinkirch
+
+from web3 import Web3, HTTPProvider, WebsocketProvider, IPCProvider
+from web3.middleware import geth_poa_middleware
+from utils.os import log_info
+
+
+class Web3Wrapper():
+
+    def __init__(self, mode, network):
+        self.mode = mode
+        self.network = network
+
+        self.w3 = None
+        self.pair_contract = None
+
+        self._setup()
+    
+    ##################
+    # PRIVATE METHODS
+    ##################
+    def _setup(self) -> None:
+        self._get_web3_object()
+
+    def _get_web3_object(self) -> None:
+        log_info(f'Setting mode {self.mode} for {self.network}')
+        if self.mode == 'http' or self.mode == 'local_http':
+            self.w3 = Web3(HTTPProvider(self.network))
+        elif self.mode == 'ws' or self.mode == 'local_ws':
+            self.w3 = Web3(WebsocketProvider(self.network))
+        elif self.mode == 'ipc' or self.mode == 'local_ipc':
+            self.w3 = Web3(IPCProvider(self.network))
+        else:
+            log_info(f'Provider type is invalid: {self.mode}. Fix .env.')
+
+
+    ##################
+    # BLOCK METHODS
+    ##################
+    def get_block(self, block_number='latest') -> dict:
+        return dict(self.w3.eth.get_block(block_number))
+
+
+    ##################
+    # LP PAIR METHODS
+    ##################
+    def get_pair_contract(self, address, abi) -> str:
+        self.pair_contract = self.w3.eth.contract(address=address, abi=abi)
+
+    def inject_middleware(self, layer=0) -> None:
+        self.w3.middleware_onion.inject(geth_poa_middleware, 
+                                        layer=layer)
+    
+    def get_reserves(self, block) -> list:
+        return self.pair_contract.functions.getReserves().call({}, block)[:2]
+
+
+    ##############
+    # TX METHODS
+    ##############
+    def get_tx(self, tx) -> dict:
+        return dict(self.w3.eth.get_transaction(tx))
+
+    def get_tx_receipt(self, tx) -> dict:
+        return dict(self.w3.eth.get_transaction_receipt(tx))