feat: implement Discount CT

Enabled on regtest and testnet

e2e/chainSwaps/chainSwaps.spec.ts

@@ -28,7 +28,7 @@ test.describe("Chain swap", () => {
         await inputReceiveAmount.fill(receiveAmount);
 
         const inputSendAmount = page.locator("input[data-testid='sendAmount']");
-        const sendAmount = "0.0100168";
+        const sendAmount = "0.01001551";
         await expect(inputSendAmount).toHaveValue(sendAmount);
 
         const inputOnchainAddress = page.locator(

package.json

@@ -65,13 +65,13 @@
         "bitcoinjs-lib": "^6.1.6",
         "bolt11": "^1.4.1",
         "boltz-bolt12": "^0.1.2",
-        "boltz-core": "^2.1.2",
+        "boltz-core": "^2.1.3",
         "buffer": "^6.0.3",
         "create-hmac": "^1.1.7",
         "ecpair": "^2.1.0",
         "ethers": "^6.13.2",
         "iframe-resizer": "^5.2.4",
-        "liquidjs-lib": "^6.0.2-liquid.35",
+        "liquidjs-lib": "^6.0.2-liquid.36",
         "localforage": "^1.10.0",
         "loglevel": "^1.9.1",
         "qr-scanner": "^1.4.2",

src/components/Fees.tsx

@@ -19,6 +19,10 @@ import { formatAmount } from "../utils/denomination";
 import { getPair } from "../utils/helper";
 import Denomination from "./settings/Denomination";
 
+// When sending to an unconfidential address, we need to add an extra
+// confidential OP_RETURN output with 1 sat inside
+const unconfidentialExtra = 5;
+
 const Fees = () => {
     const { t, pairs, fetchPairs, denomination, separator } =
         useGlobalContext();
@@ -68,7 +72,7 @@ const Fees = () => {
                         reverseCfg.fees.minerFees.claim +
                         reverseCfg.fees.minerFees.lockup;
                     if (isToUnconfidentialLiquid()) {
-                        fee += 1;
+                        fee += unconfidentialExtra;
                     }
 
                     setMinerFee(fee);
@@ -80,7 +84,7 @@ const Fees = () => {
                         chainCfg.fees.minerFees.server +
                         chainCfg.fees.minerFees.user.claim;
                     if (isToUnconfidentialLiquid()) {
-                        fee += 1;
+                        fee += unconfidentialExtra;
                     }
 
                     setMinerFee(fee);

src/utils/compat.ts

@@ -195,16 +195,19 @@ const getConstructRefundTransaction = (
         liquidNetwork?: LiquidNetwork,
         blindingKey?: Buffer,
     ) =>
-        targetFee(feePerVbyte, (fee) =>
-            fn(
-                refundDetails as any[],
-                outputScript,
-                timeoutBlockHeight,
-                addOneSatBuffer ? fee + 1 : fee,
-                isRbf,
-                liquidNetwork,
-                blindingKey,
-            ),
+        targetFee(
+            feePerVbyte,
+            (fee) =>
+                fn(
+                    refundDetails as any[],
+                    outputScript,
+                    timeoutBlockHeight,
+                    addOneSatBuffer ? fee + 1 : fee,
+                    isRbf,
+                    liquidNetwork,
+                    blindingKey,
+                ),
+            config.network !== "mainnet",
         );
 };
 

tests/components/Fees.spec.tsx

@@ -90,7 +90,7 @@ describe("Fees component", () => {
 
         const fees = pairs.reverse[BTC][LBTC].fees;
         expect(signals.minerFee()).toEqual(
-            fees.minerFees.lockup + fees.minerFees.claim + 1,
+            fees.minerFees.lockup + fees.minerFees.claim + 5,
         );
     });
 
@@ -115,7 +115,7 @@ describe("Fees component", () => {
 
         const fees = pairs.chain[BTC][LBTC].fees;
         expect(signals.minerFee()).toEqual(
-            fees.minerFees.server + fees.minerFees.user.claim + 1,
+            fees.minerFees.server + fees.minerFees.user.claim + 5,
         );
     });
 });