chore:add support for amountless in mintinfo and createMeltQuote

src/CashuWallet.ts

@@ -662,11 +662,25 @@ class CashuWallet {
 	 * @param invoice LN invoice that needs to get a fee estimate
 	 * @returns the mint will create and return a melt quote for the invoice with an amount and fee reserve
 	 */
-	async createMeltQuote(invoice: string): Promise<MeltQuoteResponse> {
+	async createMeltQuote(invoice: string, amount?: number): Promise<MeltQuoteResponse> {
 		const meltQuotePayload: MeltQuotePayload = {
 			unit: this._unit,
 			request: invoice
 		};
+
+		if (this._mintInfo?.amountless) {
+			const meltQuotePayload: MeltQuotePayload = {
+				unit: this._unit,
+				request: invoice,
+				options: {
+					amountless: {
+						amount_msat: amount ?? 0
+					}
+				}
+			};
+			const meltQuote = await this.mint.createMeltQuote(meltQuotePayload);
+			return meltQuote;
+		}
 		const meltQuote = await this.mint.createMeltQuote(meltQuotePayload);
 		return meltQuote;
 	}

src/model/MintInfo.ts

@@ -94,4 +94,7 @@ export class MintInfo {
 	get motd() {
 		return this._mintInfo.motd;
 	}
+	get amountless() {
+		return this._mintInfo.amountless;
+	}
 }

src/model/types/mint/responses.ts

@@ -105,6 +105,7 @@ export type GetInfoResponse = {
 		};
 	};
 	motd?: string;
+	amountless?: boolean;
 };
 
 /**

src/model/types/wallet/payloads.ts

@@ -48,6 +48,23 @@ export type MeltQuotePayload = {
 	 * Request to be melted to
 	 */
 	request: string;
+
+	options?: MeltQuotePayloadAmountLess;
+};
+
+/**
+ * Payload for a melt quote with an optional amountless option.
+ */
+export type MeltQuotePayloadAmountLess = {
+	/**
+	 * Optional property for specifying an amountless option.
+	 */
+	amountless?: {
+		/**
+		 * The amount in milli-satoshis.
+		 */
+		amount_msat: number;
+	};
 };
 
 /**