v12.0.0 - initial commit

packages/server/lib/plugins/zero-conf/blockcypher/blockcypher.js

@@ -0,0 +1,68 @@
+const qs = require('querystring')
+const axios = require('axios')
+const _ = require('lodash/fp')
+
+const { fetchRBF } = require('../../wallet/bitcoind/bitcoind')
+module.exports = { authorize }
+
+function highConfidence(confidence, txref, txRBF) {
+  if (txref.double_spend) return 0
+  if (txRBF) return 0
+  if (txref.confirmations > 0 || txref.confidence * 100 >= confidence)
+    return txref.value
+  return 0
+}
+
+function authorize(
+  account,
+  toAddress,
+  cryptoAtoms,
+  cryptoCode,
+  isBitcoindAvailable,
+) {
+  return Promise.resolve().then(() => {
+    if (cryptoCode !== 'BTC')
+      throw new Error('Unsupported crypto: ' + cryptoCode)
+
+    const query = qs.stringify({
+      token: account.token,
+      includeConfidence: true,
+    })
+
+    const confidence = account.confidenceFactor
+    const isRBFEnabled = account.rbf
+    const url = `https://api.blockcypher.com/v1/btc/main/addrs/${toAddress}?${query}`
+
+    return axios.get(url).then(r => {
+      const data = r.data
+      if (isBitcoindAvailable && isRBFEnabled && data.unconfirmed_txrefs) {
+        const promises = _.map(
+          unconfirmedTxref => fetchRBF(unconfirmedTxref.tx_hash),
+          data.unconfirmed_txrefs,
+        )
+        return Promise.all(promises).then(values => {
+          const unconfirmedTxsRBF = _.fromPairs(values)
+          const sumTxRefs = txrefs =>
+            _.sumBy(
+              txref =>
+                highConfidence(
+                  confidence,
+                  txref,
+                  unconfirmedTxsRBF[txref.tx_hash],
+                ),
+              txrefs,
+            )
+          const authorizedValue =
+            sumTxRefs(data.txrefs) + sumTxRefs(data.unconfirmed_txrefs)
+          return cryptoAtoms.lte(authorizedValue)
+        })
+      }
+
+      const sumTxRefs = txrefs =>
+        _.sumBy(txref => highConfidence(confidence, txref), txrefs)
+      const authorizedValue =
+        sumTxRefs(data.txrefs) + sumTxRefs(data.unconfirmed_txrefs)
+      return cryptoAtoms.lte(authorizedValue)
+    })
+  })
+}

packages/server/lib/plugins/zero-conf/mock-zero-conf/mock-zero-conf.js

@@ -0,0 +1,11 @@
+module.exports = { authorize }
+
+function authorize(account, toAddress, cryptoAtoms, cryptoCode) {
+  return Promise.resolve().then(() => {
+    if (cryptoCode !== 'BTC')
+      throw new Error('Unsupported crypto: ' + cryptoCode)
+
+    const isAuthorized = false
+    return isAuthorized
+  })
+}