Whale Watch Example - Txns

node v10.22.1
version: 1.0.0
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const Web3Data = require("web3data-js@0.6.1") // Set the blockchainId of the blockchain to listen on const blockchainId = '1c9c969065fcd1cf' // Create the Web3Data instances passing in your API Key (Get one! -> amberdata.io/onboarding) const w3d = new Web3Data(process.env.API_KEY, {blockchainId}) // Use these parameters to adjust the threshold value and the comparison operator const thresholdValue = 10 const thresholdSign = '>' w3d.connect() w3d.on({eventName: 'transactions'}, txn => { const txnValue = toBaseDenom[txn.blockchainId](txn.value) if(meetsThreshold(txnValue, thresholdValue, thresholdSign)) { const time = txn.timestamp ? (new Date(txn.timestamp) ).toLocaleString() : null console.log(`New transaction ${txn.hash.slice(0,10)} value - ${round(txnValue, 2)} at ${time}`) } }) // Simple helper function for roud const round = (n, digits) => Number.parseFloat(n).toFixed(digits) // Function that returns whether or not the threshold gets met const meetsThreshold = (value, thresholdValue, thresholdSign) => { switch (thresholdSign) { case '>': return value > thresholdValue case '<': return value < thresholdValue case '≥': return value >= thresholdValue case '≤': return value <= thresholdValue default: break } } // Converts values from lowest to base denomination based on the blockchain const toBaseDenom = { '1c9c969065fcd1cf': wei => wei / Math.pow(10, 18), // Eth '408fa195a34b533de9ad9889f076045e': sat => sat / Math.pow(10, 8), // Btc 'f94be61fd9f4fa684f992ddfd4e92272': photon => photon / Math.pow(10, 8), // Ltc }
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