IsConnectionError checks if the error is related to network issues.

IsNonCriticalProviderError determines if the non-RPC error is not critical.

IsCriticalRpcError determines if the RPC error is critical.

Not found should not be cancelling the requests, as that's returned when we are hitting a non archival node for example, it should continue the chain as the next provider might have archival support.

Non-RPC Errors.

RPC Errors.

ProviderErrorType defines the type of non-RPC error for JSON serialization.