2

I am trying to verify a proof that a contract has some value stored at a specified key using the contracts storage root and a proof received from a web3.eth.getProof call. Here are the results:

storageHash: '0x030748d1533b7bd4a22bba317ba2caa7c244bcbdb5671b95c324766a19edbdbd',
storageProof: {  
     key: '0x2',  
     value: '0x24ffaf4fd513facfcd1461d1ab0ddd43bb9ca373',  
     proof: [  
     '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',  
     '0xf891a0763902fd427b8f29c5f26e793ad3ea6705b120edef718690f785bd1ee1e404258080808080a01a08e4a438b60cca94c89097eb98f85782a124e8ebdfcee7f4697af0a9b4d441808080a0cbc0156d648e34e4a2405a4f68bc44e2071992077bf0cce9ef0394fc0ed5d11f80808080a00a39726d15dd00726445876325da5f10fdc05e5f9884d59e10cbd23a5664969e80',  
     '0xf8518080808080a0fbf384e26e9ea66e28445ee01b9cc85c31496158d390bf17a42d35ad559a6e7480a0055de1019e7abe1a23cffb7a102e8cbe19d1c5e2dc8253022439355a1a55a852808080808080808080',          
     '0xf69f3787fa12a823e0f2b7631cc41b3ba8828b3321ca811111fa75cd3aa3bb5ace959424ffaf4fd513facfcd1461d1ab0ddd43bb9ca373'  
        ]  
      }  
    ]

I am not sure why the proof includes 4 nodes when the key is only 1 nibble long. Could someone explain how to verify this proof and how exactly it was constructed?

It looks like (from putting the proof nodes in a trie, that the data 9424ffaf4fd513facfcd1461d1ab0ddd43bb9ca373 is stored under key 405787fa12a823e0f2b7631cc41b3ba8828b3321ca811111fa75cd3aa3bb5ace. Not exactly sure how to interprest this as the data I'm looking for is the fixed size (obviously) address 24ffaf4fd513facfcd1461d1ab0ddd43bb9ca373 under storage key 2. Pretty confused...

Thanks :)

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