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-rw-r--r--ui/lib/contract-namer.js33
1 files changed, 33 insertions, 0 deletions
diff --git a/ui/lib/contract-namer.js b/ui/lib/contract-namer.js
new file mode 100644
index 000000000..f05e770cc
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+++ b/ui/lib/contract-namer.js
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+/* CONTRACT NAMER
+ *
+ * Takes an address,
+ * Returns a nicname if we have one stored,
+ * otherwise returns null.
+ */
+
+const contractMap = require('eth-contract-metadata')
+const ethUtil = require('ethereumjs-util')
+
+module.exports = function (addr, identities = {}) {
+ const checksummed = ethUtil.toChecksumAddress(addr)
+ if (contractMap[checksummed] && contractMap[checksummed].name) {
+ return contractMap[checksummed].name
+ }
+
+ const address = addr.toLowerCase()
+ const ids = hashFromIdentities(identities)
+ return addrFromHash(address, ids)
+}
+
+function hashFromIdentities (identities) {
+ const result = {}
+ for (const key in identities) {
+ result[key] = identities[key].name
+ }
+ return result
+}
+
+function addrFromHash (addr, hash) {
+ const address = addr.toLowerCase()
+ return hash[address] || null
+}