dappTx

Shows volume of biggest ethereum smart contracts by function name. Pulls data from Infura, puts it in a postgres DB. Exposed via a webapp that queries the DB. Building front-end.

See Dev branch:

• hosted at: https://shrouded-journey-22394.herokuapp.com
• format: /api/:contractID/:startTime/:endTime (all three are in hex, grab these from etherscan)
• usage: https://shrouded-journey-22394.herokuapp.com/api/0x8d12a197cb00d4747a1fe03395095ce2a5cc6819/0x5a6fc956/0x5a7e7918

Sample Response:

"2018-1-29": {
    "sampledEthTx": 388,
    "contractTx": 13,
    "functions": {
        "withdraw": 3,
        "deposit": 2,
        "withdrawToken": 3,
        "trade": 5
    }
}

run

• nodemon server.js
• cd client
• npm start

important files

• pullData.js: called by cronjob. polls infura api for new blocks to save in DB
• frequency.js: returns contract tx frequency by timestamp
• server.js: entry point
• home.js: chart controller

next

• input form for contractID and dates. multiple graphs. include functions in graph
• gather more contractID <> dApp mappings
• handle failed transactions. some blocks have tons https://etherscan.io/txs?block=4905182&p=1. to do this, explore transaction receipts trie https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getblockbyhash
• put on ipfs

inspirated by @owocki gitcoinco/skunkworks#19 (comment)