The problem of historical data availability in EVM chains

The problem of historical data availability is in EVM chains, why it exists and how we can try to tackle it.

Prerequisites

• Python 3.10 or
• Docker

Performing queries

Querying the node

Querying a node for your balance

curl -X POST --header "Content-Type: application/json" \
--data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xc37b40ABdB939635068d3c5f13E7faF686F03B65", "latest"],"id":1}' \
https://eth.llamarpc.com

Querying a transaction by hash

Check getTransactionByHash

curl -X POST --header "Content-Type: application/json" \
--data '{"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":["0x05da328841fccf475de11a731036b8cb10f7245a8f82f2c17a0c9cff41154995"],"id":1}' \
https://eth.llamarpc.com

Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "blockHash": "0xe9a750e11ab6ea2cbb65c0d36304c280953a47bfbe71f3590ec7642bc0831b6d",
    "blockNumber": "0x114b352",
    "from": "0x3f52c7ab2f23223e0338943db61caa6700d54db3",
    "gas": "0x36945",
    "gasPrice": "0x256f43775",
    "maxPriorityFeePerGas": "0x14e427b",
    "maxFeePerGas": "0x2d8558554",
    "hash": "0x05da328841fccf475de11a731036b8cb10f7245a8f82f2c17a0c9cff41154995",
    "input": "0x3593564c000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000006502e3530000000000000000000000000000000000000000000000000000000000000002000c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000016000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000e3ada1334cc6a8fbad7000000000000000000000000000000000000000000000000013dc735c6f75f8200000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000002bbe042e9d09cb588331ff911c2b46fd833a3e5bd6002710c02aaa39b223fe8d0a0e5c4f27ead9083c756cc200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000013dc735c6f75f82",
    "nonce": "0x14",
    "to": "0x3fc91a3afd70395cd496c647d5a6cc9d4b2b7fad",
    "transactionIndex": "0x89",
    "value": "0x0",
    "type": "0x2",
    "accessList": [],
    "chainId": "0x1",
    "v": "0x1",
    "r": "0x2a9ac96b560aaf028282274d9775dffd2328a473d6392e1bbc61059398213f9b",
    "s": "0x49b7062b59851aca394b5d9cf2db05372b7cb0bf4e2f3b2bce44bb57627d41d7"
  }
}

Querying logs

curl -X POST --header "Content-Type: application/json" \
--data '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0x05da328841fccf475de11a731036b8cb10f7245a8f82f2c17a0c9cff41154995"],"id":1}' \
https://eth.llamarpc.com

Using indexers

We have created a small set of scripts that you can execute to obtain different information from indexers. They are based on the rotki codebase.

Setting up the works

1. Clone the repo at github
2. Setup the environment 2.1 Using virtualenv. It requires python 3.10

   $ python3.10 -m venv env
   $ source env/bin/activate
   $ pip install .
   

2.2 Using Docker

$ docker build -t rwork .
$ docker run rwork
$ docker run rwork python src/etherscan.py

Querying Etherscan

Check https://github.com/yabirgb/protocolberg/blob/master/src/etherscan.py

Querying TheGraph

Check https://github.com/yabirgb/protocolberg/blob/master/src/thegraph.py

Querying TrueBlocks

1. Configure TrueBlocks. More information at https://trueblocks.io/tutorials/
2. Check https://github.com/yabirgb/protocolberg/blob/master/src/trueblocks.py

You can use the following exposed TrueBlocks API during the workshop:

https://clean-vertically-oriole.ngrok-free.app