* create ensureOkResponse and check against RPC responses
* Merge with develop branch
* added single unit test
* main nodes added
* getBalance method
* remove console.log
* minor conflict fix - readd polyfill to integration test
* added two more method tests
* seperate rpcnode from extended classes
* fixes etherscan
* added all tests
* revert files with only formatting changes
* remove console.logs - still need to update snapshot before tests will pass
* updated snapshot due to RpcNode fixes for Infura and Etherscan nodes
* added RpcNodeTest config so we don't rely on constants in code
* undo formatting changes
* Multiple fixes to error handling tokens.
* Fixed TSC errors
* Minor styling edit - change async func to promise
* changed shape of tokenBalances
* change balance type back to stricter TokenValue type
* remove package.json change and include test for error state.
* minor change removing unneeded line of code
* added longer timeout for api
* update snapshot
Eddie Wang
Daniel Ternyak