Node API

This API is hosted on Google App Engine. You can interact the API using this base URL and appending the following endpoints to it. https://aglawson.uw.r.appspot.com

NOTE: DO NOT USE IN PRODUCTION. THIS API HAS VERY LOW RATE LIMITS.

If you would like an API key (needed for access to goerli_relay) or an added function, feel free to email me at [email protected]

Endpoints

nft_balance

• inputs:

  • contract: address of NFT contract
  • wallet: address of wallet

• outputs_address:

  • json object containing inputs, data (int)

• example input

https://api.link.app/nft_balance?contract=0x2a459947f0ac25ec28c197f09c2d88058a83f3bb&wallet=0xE4508bE47D201847eAb75819740900f662657FAD

• example output

{"inputs":{"wallet":"0xE4508bE47D201847eAb75819740900f662657FAD","contract":"0x2a459947f0ac25ec28c197f09c2d88058a83f3bb"},"output":{"balance":3},"success":true}

token_balance

• inputs:
  • contract: address of NFT contract
  • wallet: address of wallet
• outputs:
  • json object containing inputs, data (float)
• example input

https://api.link.app/token_balance?contract=0x414BdFc701AeF58bE8AfDB1e38884d79B810C7D9&wallet=0xE4508bE47D201847eAb75819740900f662657FAD

• example output

{"inputs":{"wallet":"0xE4508bE47D201847eAb75819740900f662657FAD","contract":"0x414BdFc701AeF58bE8AfDB1e38884d79B810C7D9"},"output":{"data":2959.02477},"success":true}

get_selector

• Description:
  • Returns the selector hash for a given function and parameters. Useful for relay transactions.
• inputs:
  • string of function name and parameter types (ex. transferFrom(address,address,uint256) )
• outputs:
  • hash representing the function and parameter types

get_encoded_params

• Description:
  • Returns the hash of the transaction parameters. Useful for relay transactions.
• inputs:
  • array of types, comma separated (ex. uint256,address,bool )
  • array of values, comma separated (ex. 0,0xE4508bE47D201847eAb75819740900f662657FAD,false )
• outputs:
  • hash of the input data

get_relay_nonce

• Description:
  • Returns the nonce for the tx sender from the relay contract. Ensures transactions are handled sequentially.
• inputs:
  • wallet address of user
• outputs:
  • nonce (int)

goerli_relay

NOTE: Recipient smart contract must be on Goerli Testnet, must be ERC-2771 Compatible, and must have trusted forwarder set as 0x2A0d1f0EE9c5584b1694BCa16879423432770A52

• Description:
  • Sends a transaction to a relay contract which relays the transaction to the destination smart contract. Useful for meta transactions.
• inputs:
  • reqStruct: json object containing tx data (from, to, value, gas, nonce, data)
  • signature: hash resulting from user signing the data in reqStruct
• outputs:
  • transaction hash if successful