Merge pull request #158 from Samourai-Wallet/enh_dojo_txs_caches

misc improvements in bitcoind rpc transactions class

lib/bitcoind-rpc/transactions.js

@@ -23,18 +23,9 @@ class Transactions {
    */
   constructor() {
     // Caches
-    this.txCache = LRU({
-      // Maximum number of transactions to store
-      max: 10000,
-      // Function used to compute length of item
-      length: (n, key) => 1,
-      // Maximum age for items in the cache. Items do not expire
-      maxAge: Infinity
-    })
-
     this.prevCache = LRU({
       // Maximum number of transactions to store
-      max: 100000,
+      max: 20000,
       // Function used to compute length of item
       length: (n, key) => 1,
       // Maximum age for items in the cache. Items do not expire
@@ -85,19 +76,9 @@ class Transactions {
    * @returns {Promise}
    */
   async getTransaction(txid, fees) {
-    const keyCache = `${txid}-${fees ? '1' : '0'}`
-
-    // Return transaction from cache when possible
-    if (this.txCache.has(keyCache))
-      return this.txCache.get(keyCache)
-
     try {
       const tx = await this.rpcClient.getrawtransaction(txid, true)
-      const ret = await this._prepareTxResult(tx)
-      // Store the result in cache
-      if (ret.block && ret.block.hash)
-        this.txCache.set(txid, ret)
-      return ret
+      return this._prepareTxResult(tx, fees)
     } catch(e) {
       Logger.error(e, 'Bitcoind RPC : Transaction.getTransaction()')
       return Promise.reject(errors.generic.GEN)
@@ -197,10 +178,7 @@ class Transactions {
           ptx = this.prevCache.get(inTxid)
         } else {
           ptx = await this.rpcClient.getrawtransaction(inTxid, true)
-          if (ptx.blockhash && ptx.confirmations && ptx.blocktime) {
-            ptx.height = rpcLatestBlock.height - ptx.confirmations + 1
-            this.prevCache.set(inTxid, ptx)
-          }
+          this.prevCache.set(inTxid, ptx)
         }
 
         const outpoint = ptx.vout[txin.outpoint.vout]