eth_getproof

How to use it

// yarn add @tatumio/tatum

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

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

const result = await tatum.rpc.getProof("0xa41d19F4258a388c639B7CcD938FCE3fb7D05e86",
    ["0x0000000000000000000000000000000000000000000000000000000000000000"],
    "latest")
    
await tatum.destroy() // Destroy Tatum SDK - needed for stopping background jobs

Overview

The eth_getProof is a JSON-RPC 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: "0xa41d19F4258a388c639B7CcD938FCE3fb7D05e86"
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.

JSON-RPC Request and Response Examples

Request:

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getProof",
  "params": [
    "0xa41d19F4258a388c639B7CcD938FCE3fb7D05e86",
    [
      "0x0000000000000000000000000000000000000000000000000000000000000000"
    ],
    "latest"
  ]
}

Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "address": "0xa41d19f4258a388c639b7ccd938fce3fb7d05e86",
    "accountProof": [],
    "balance": "0x0",
    "codeHash": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
    "nonce": "0x0",
    "storageHash": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "storageProof": [{}]
  }
}