EtherscanQL

A graphQL wrapper for the popular Etherscan.io REST API.

This implementation uses a single public API key and is limited to 5 req/s

Please append '/staging' to the server URL of the playground or the connection will fail

Once you make it to the graphQL playground and the server is connected you can explore the self-documenting API to start crafting your queries!

To connect to this endpoint with Apollo Client so you can serve some ethereum information on your front end head over to : https://www.apollographql.com/docs/tutorial/client.html

and connect to: https://z81urwmpq2.execute-api.us-west-2.amazonaws.com/staging/

Accounts:

• Get Ether Balance for a single Address (returned in wei; * 0.000000000000000001 to return ETHER) 👍
• Get Ether Balance for multiple Addresses in a single call👍
• Get a list of 'Normal' Transactions By Address👍
• Get a list of 'Internal' Transactions by Address👍
• Get "Internal Transactions" by Transaction Hash👍
• Get a list of "ERC20 - Token Transfer Events" by Address👍
• Get list of Blocks Mined by Address👍

Contracts:

• Get Contract ABI for Verified Contract Source Codes👍
• Get Contract Source Code for Verified Contract Source Code👍

Transactions:

• [BETA] Check Contract Execution Status (if there was an error during contract execution) 👍
• [BETA] Check Transaction Receipt Status (Only applicable for Post Byzantium fork transactions) 👍

Blocks:

• [BETA] Get Block And Uncle Rewards by BlockNo 👍

Event Logs:

• [Beta] The Event Log API was designed to provide an alternative to the native eth_getLogs. 🛠️

GETH/Parity proxy:

• eth_blockNumber👍

=> Returns the number of most recent block

• eth_getBlockByNumber👍

=> Returns information about a block by block number.

• eth_getUncleByBlockNumberAndIndex👍

=> Returns information about a uncle by block number.

• eth_getBlockTransactionCountByNumber👍

=> Returns the number of transactions in a block from a block matching the given block number

• eth_getTransactionByHash👍

=> Returns the information about a transaction requested by transaction hash

• eth_getTransactionByBlockNumberAndIndex👍

=> Returns information about a transaction by block number and transaction index position

• eth_getTransactionCount👍

=> Returns the number of transactions sent from an address

• eth_sendRawTransaction 🛠️

=> Creates new message call transaction or a contract creation for signed transactions

• eth_getTransactionReceipt👍

=> Returns the receipt of a transaction by transaction hash

• eth_call👍

=> Executes a new message call immediately without creating a transaction on the block chain

• eth_getCode👍

=> Returns code at a given address

• eth_getStorageAt (**experimental)👍

=> Returns the value from a storage position at a given address.

• eth_gasPrice👍

=> Returns the current price per gas in wei.

• eth_estimateGas🛠️

=> Makes a call or transaction, which won't be added to the blockchain and returns the used gas, which can be used for estimating the used gas

Tokens:

• Get ERC20-Token TotalSupply by ContractAddress 👍
• Get ERC20-Token Account Balance for TokenContractAddress 👍

Stats:

• Get Total Supply of Ether (returned in wei; * 0.000000000000000001 to return ETHER)👍

• Get ETHER LastPrice Price👍

Sample Query

Get a list of 'Normal' Transactions By Address

• [Optional Parameters] startblock: starting blockNo to retrieve results
• endblock: ending blockNo to retrieve results (Returns up to a maximum of the last 10000 transactions only)

query {
  normalTxByAddress(
    account: "0xddbd2b932c763ba5b1b7ae3b362eac3e8d40121a"
    startblock: "47884"
    endblock: "915000"
  ) {
    blockNumber
    gas
    hash
  }
}

Next Steps

Build a proper front end with React and Apollo Client to consume this API

• I would like to explore more with NextJS to play with server-side-rendering in React.

• I also want to write more plain CSS (no bootstrap/frameworks) with Flexbox and Grid

Continue expanding the capabilities of graphQL

• Caching results and creating a database store (looking at you Redis)

• Offer support for WebSockets for real-time data and as a way to use pub/sub patterns to possibility reduce the amout of calls on the system.

• Eventually I would like to try and tackle of creating a graphQL API for infura to offer more direct and comprehensive API to interact with the ethereum and IPFS ecosytem.

• Add testing coverage