diff --git a/cashu.ts b/cashu.ts
index 4717e81..d126581 100644
--- a/cashu.ts
+++ b/cashu.ts
@@ -9,16 +9,13 @@ export default class PortalBtcWalletCashu {
   private cashuTxns: CashuTxn[] = [];
   private proofs: Proof[] = [];
   private onBalanceUpdated: (() => void) | null = null;
+  private mint = new CashuMint(PortalBtcWallet.MINT_URL);
+  private cashuWallet: CashuWallet = new CashuWallet(this.mint);
 
   get txns() {
     return this.cashuTxns;
   }
 
-  get cashuWallet() {
-    const mint = new CashuMint(PortalBtcWallet.MINT_URL);
-    return new CashuWallet(mint);
-  }
-
   get balance() {
     return this.proofs.reduce((sum, p) => sum + p.amount, 0);
   }
@@ -66,6 +63,7 @@ export default class PortalBtcWalletCashu {
   }
 
   async meltProofsToPayInvoice(invoice: string) {
+    await this.cashuWallet.loadMint();
     const meltQuote = await this.cashuWallet.createMeltQuote(invoice);
     const amountToMelt = meltQuote.amount + meltQuote.fee_reserve;
     const { keep, send } = await this.cashuWallet.send(