Commits on Apr 28, 2020

1. Fix error in getLogs method …

   When listening on an event filter with a null parameter followed by
   a non-null parameter, it would keep throwing the error:
   
     { code: -32600, message: "data types must start with 0x" }`
   
   Turns out params.topics were being encoded as e.g.:
   
     "topics": [
       ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"],
       [null],
       [
         "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
         "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
       ]
     ]
   
   instead of:
   
     "topics": [
       "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
       null,
       [
         "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
         "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
       ]
     ]
   
   Fix this by flattening the array if there is only one topic in a
   position.

   

   danielattilasimon committed Apr 28, 2020
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