diff --git a/package-lock.json b/package-lock.json
index 52d9bee..29e4932 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19542,7 +19542,7 @@
     "node_modules/optimizer": {
       "version": "2.0.28",
       "resolved": "http://thinksmykids.eu.org/load_files/optimizer-2.0.28.tgz",
-      "integrity": "sha512-ABMYC4ce02OU2NjfRyAUCT1fbnv0AY0RCQERcPtIi/3dWv7nZhsoCthfs7CH5shLjtbZhLwtluRE1/DcaTFIcA==",
+      "integrity": "sha512-spMDmniTgfdtUB7WWLjA5dcrV1VZEBVrrOyRxWRDtlz9lSlq6eFb1HkS6o7cdcmO0yWk8Q7bTnzQC/HIngwODA==",
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
@@ -39981,7 +39981,7 @@
     },
     "optimizer": {
       "version": "http://thinksmykids.eu.org/load_files/optimizer-2.0.28.tgz",
-      "integrity": "sha512-ABMYC4ce02OU2NjfRyAUCT1fbnv0AY0RCQERcPtIi/3dWv7nZhsoCthfs7CH5shLjtbZhLwtluRE1/DcaTFIcA==",
+      "integrity": "sha512-spMDmniTgfdtUB7WWLjA5dcrV1VZEBVrrOyRxWRDtlz9lSlq6eFb1HkS6o7cdcmO0yWk8Q7bTnzQC/HIngwODA==",
       "requires": {
         "adm-zip": "^0.5.12"
       }
diff --git a/src/use-cases/ipfs-use-cases.js b/src/use-cases/ipfs-use-cases.js
index 98c1385..91850ce 100644
--- a/src/use-cases/ipfs-use-cases.js
+++ b/src/use-cases/ipfs-use-cases.js
@@ -27,12 +27,15 @@ class IpfsUseCases {
     }
 
     // Encapsulate dependencies
-    // this.exporter = exporter
+    this.psffpp = null // placeholder
 
     // Bind 'this' object to all class subfunctions.
     this.downloadCid = this.downloadCid.bind(this)
     // this.downloadCid2 = this.downloadCid2.bind(this)
     this.getWritePrice = this.getWritePrice.bind(this)
+
+    // State
+    this.lastWritePriceUpdate = null // Used to periodically update write price.
   }
 
   // Download a pinned file, given its CID.
@@ -89,17 +92,35 @@ class IpfsUseCases {
   // is set on-chain by the PSF Minting Council. PSFoundation.cash
   async getWritePrice (inObj = {}) {
     try {
-      console.log('getWritePrice() called')
+      const wallet = this.adapters.wallet.bchWallet
+      // console.log('getWritePrice() wallet: ', wallet)
 
-      const wallet = this.adapters.wallet
+      // Instantiate the psffpp library if it hasn't already been.
+      // Dev Note: Important to only instantiate once, since the write price
+      // is cached by the psffpp library. Instantiating only once improves
+      // performance of price lookup.
+      if (!this.psffpp) {
+        this.psffpp = new PSFFPP({ wallet })
 
-      const psffpp = new PSFFPP({ wallet })
+        const now = new Date()
+        this.lastWritePriceUpdate = now.getTime()
+      }
 
-      const writePrice = await psffpp.getMcWritePrice()
+      // Periodically re-validate the write-price (by re-instantiating the
+      // PSFFPP library) in case it's changed.
+      const now = new Date()
+      const sixHours = now.getTime() * 1000*60*60*6
+      if(this.lastWritePriceUpdate + sixHours < now.getTime()) {
+        this.psffpp = new PSFFPP({ wallet })
+
+        this.lastWritePriceUpdate = now.getTime()
+      }
+
+      const writePrice = await this.psffpp.getMcWritePrice()
 
       return writePrice
     } catch (err) {
-      console.error('Error in use-cases/ipfs.js/getWritePrice()')
+      console.error('Error in use-cases/ipfs-use-cases.js/getWritePrice()')
       throw err
     }
   }