defi-state-querier

defi-state-querier

Description

Return the asset list of an address in a blockchain. These assets are native token, tokens, nft, and the assets locked in protocols.

Requirement

• Accuracy
• Fastest speed
• Post all requests in a call with maximum batch size and workers

Input

• address: str (lower case or upper case)
• block_number: int
• chain_id: string. Eg: 0x1, 0x38
• query: array
  • query_id: id of query
  • entity_id: token address, nft or id of protocols like aave-v2, compound, and pancakeswap-amm
  • query_type: one of keywords - token_balance, ntf_balance, deposit_borrow, protocol_reward, and protocol_apy.

Output

[
  {
    "query_id": "<query_id>",
    "entity_id": "<token_address>",
    "query_type": "token_balance",
    "token_balance": 173.84
  },
  {
    "query_id": "<query_id>",
    "entity_id": "<nft_address>",
    "query_type": "nft_balance",
    "nft_balance": 11
  },
  {
    "query_id": "<query_id>",
    "entity_id": "<protocol_id>",
    "query_type": "deposit_borrow",
    "deposit_borrow": {
      "<protocol_address>": {
        "<asset_address_1>": {
          "borrow_amount": 184.4,
          "deposit_amount": 331.5
        },
        "<asset_address_2>": {
          "borrow_amount": 184.4,
          "deposit_amount": 331.5
        }
      }
    }
  },
  {
    "query_id": "<query_id>",
    "entity_id": "<protocol_id>",
    "query_type": "protocol_reward",
    "protocol_reward": {
      "<reward_address>": {
        "amount": 1.4
      }
    }
  },
  {
    "query_id": "<query_id>",
    "entity_id": "<protocol_id>",
    "query_type": "protocol_apy",
    "protocol_apy": {
      "<protocol_address>": {
        "<asset_address_1>": {
          "total_deposit": 331.5,
          "total_borrow": 184.4,
          "deposit_apy": 0.051,
          "borrow_apy": 0.067,
        }
      }
    }
  }
]

Query state data

Preparation

Get some information of protocols in their github or documents.

[1] Create abi files having format like erc20 token abi or aave v3 lending abi.

[2] Get basic information of protocols and save in a python file like aave_v2_eth.py.

Infrastructure

Important files

[1] state_querier.py - create function information, encode function calls, push function calls, and decode response data.

[2] state_processor.py - receive input, combine all encoded function calls in a batch, execute function call batch, process response data, and return output.

[3] protocol_services.py - protocol service pattern file, all protocols should follow this file like aave_v2_services.py. There are 4 main functions of a service: get service info, get token list related to protocol, get asset information supported by protocol (dapp), get all information of function calls, and process response data.

[4] token_services.py - get information of erc 20 function calls and process response data.

Examples

[1] token_information.py - example of using state querier.

[2] wallet_information.py - example of using state processor.