eth_getproof

How to use it

// yarn add @tatumio/tatum

import { TatumSDK, Base, Network } from '@tatumio/tatum'

const tatum = await TatumSDK.init<Base>({ network: Network.BASE })

const result = await tatum.rpc.getProof(
  '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913',
  ['0x0000000000000000000000000000000000000000000000000000000000000000'],
  'latest',
)

await tatum.destroy() // Destroy Tatum SDK - needed for stopping background jobs

Overview

The eth_getProof is an method that retrieves the Merkle-Patricia proof for an account, storage key-value pairs, and account transaction count. It allows developers to verify the state of an account or storage value at a specific block without needing the entire state trie. This method is particularly useful for light clients or off-chain applications that require proof of an account's state or specific storage values.

Parameters

1. address - Data, 20 Bytes
   • The address of the account.
   • Example: "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
2. keys - Array of Data
   • An array of storage keys for which the proof should be generated.
   • Example: ["0x0000000000000000000000000000000000000000000000000000000000000000"]
3. blockNumber - Quantity or String
   • The block number for which the proof should be generated.
   • Example: "0x1" or "latest"

Return Object

The method returns an object containing the following fields:

1. accountProof - Array of Data
   • The serialized Merkle-Patricia proof for the account.
2. balance - Quantity
   • The balance of the account at the specified block.
3. codeHash - Data, 32 Bytes
   • The hash of the code for the account at the specified block.
4. nonce - Quantity
   • The transaction count of the account at the specified block.
5. storageProof - Array of Object
   • An array of storage proof objects, one for each requested key, containing the following fields:
     • key - Data, 32 Bytes: The storage key.
     • value - Quantity: The storage value.
     • proof - Array of Data: The serialized Merkle-Patricia proof for the key-value pair.

Response Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "address": "0x1234567890123456789012345678901234567890",
    "accountProof": ["0x..."],
    "balance": "0x31e1c8c4d6299",
    "codeHash": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
    "nonce": "0x0",
    "storageHash": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "storageProof": [
      {
        "key": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "value": "0x0",
        "proof": []
      }
    ]
  }
}