37 lines
1 KiB
JavaScript
37 lines
1 KiB
JavaScript
const qs = require('querystring')
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const axios = require('axios')
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const _ = require('lodash/fp')
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module.exports = {authorize}
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function isHighConfidence (confidence, txref) {
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return txref.confirmations > 0 || txref.confidence * 100 >= confidence ? txref.value : 0
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}
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function authorize (account, toAddress, cryptoAtoms, cryptoCode) {
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return Promise.resolve()
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.then(() => {
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if (cryptoCode !== 'BTC') throw new Error('Unsupported crypto: ' + cryptoCode)
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const query = qs.stringify({
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token: account.token,
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includeConfidence: true
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})
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const confidence = account.confidence
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const url = `https://api.blockcypher.com/v1/btc/main/addrs/${toAddress}?${query}`
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console.log(url)
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return axios.get(url)
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.then(r => {
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const data = r.data
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const sumTxRefs = txrefs => _.sumBy(txref => isHighConfidence(confidence, txref), txrefs)
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const authorizedValue = sumTxRefs(data.txrefs) + sumTxRefs(data.unconfirmed_txrefs)
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return cryptoAtoms.lte(authorizedValue)
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})
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})
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}
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