feat: add tx hash retrieval in wallet plugin

lib/plugins/wallet/litecoind/litecoind.js

@@ -125,11 +125,16 @@ function checkBlockchainStatus (cryptoCode) {
     .then(res => !!res['initialblockdownload'] ? 'syncing' : 'ready')
 }
 
+function getTxHashesByAddress (cryptoCode, address) {
+  throw new Error(`Transactions hash retrieval not implemented for this coin!`)
+}
+
 module.exports = {
   balance,
   sendCoins,
   newAddress,
   getStatus,
   newFunding,
-  checkBlockchainStatus
+  checkBlockchainStatus,
+  getTxHashesByAddress
 }