feat(xlm): add estimation fees

Signed-off-by: Stéphane Prohaszka <[email protected]>
LedgerHQ · Jul 17, 2024 · 2798f33 · 2798f33
1 parent 159c82e
commit 2798f33
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Showing 5 changed files with 39 additions and 37 deletions.
diff --git a/libs/coin-modules/coin-stellar/src/api/index.integ.test.ts b/libs/coin-modules/coin-stellar/src/api/index.integ.test.ts
@@ -16,19 +16,18 @@ describe("Stellar Api", () => {
     });
   });
 
-  // describe("estimateFees", () => {
-  //   it("returns a default value", async () => {
-  //     // Given
-  //     const address = "rDCyjRD2TcSSGUQpEcEhJGmDWfjPJpuGxu";
-  //     const amount = BigInt(100);
+  describe("estimateFees", () => {
+    it("returns a default value", async () => {
+      // Given
+      const amount = BigInt(100_000);
 
-  //     // When
-  //     const result = await module.estimateFees(address, amount);
+      // When
+      const result = await module.estimateFees(address, amount);
 
-  //     // Then
-  //     expect(result).toEqual(BigInt(10));
-  //   });
-  // });
+      // Then
+      expect(result).toEqual(BigInt(100));
+    });
+  });
 
   describe("listOperations", () => {
     it("returns a list regarding address parameter", async () => {
@@ -68,20 +67,23 @@ describe("Stellar Api", () => {
     });
   });
 
-  // describe("craftTransaction", () => {
-  //   it("returns a raw transaction", async () => {
-  //     // When
-  //     const result = await module.craftTransaction(address, {
-  //       recipient: "rKRtUG15iBsCQRgrkeUEg5oX4Ae2zWZ89z",
-  //       amount: BigInt(10),
-  //       fee: BigInt(1),
-  //     });
+  describe("craftTransaction", () => {
+    it("returns a raw transaction", async () => {
+      // When
+      const result = await module.craftTransaction(address, {
+        mode: "send",
+        recipient: "GD6QELUZPSKPRWVXOQ3F6GBF4OBRMCHO5PHREXH4ZRTPJAG7V5MD7JGX",
+        amount: BigInt(1_000_000),
+        fee: BigInt(100),
+      });
 
-  //     // Then
-  //     expect(result.slice(0, 34)).toEqual("120000228000000024001BCDA6201B001F");
-  //     expect(result.slice(38)).toEqual(
-  //       "61400000000000000A6840000000000000018114CF30F590D7A9067B2604D80D46090FBF342EBE988314CA26FB6B0EF6859436C2037BA0A9913208A59B98",
-  //     );
-  //   });
-  // });
+      // Then
+      expect(result.slice(0, 68)).toEqual(
+        "AAAAAgAAAAD9Ai6ZfJT42rd0Nl8YJeODFgju688SXPzMZvSA369YPwAAAGQAAHloAAAI",
+      );
+      expect(result.slice(70)).toEqual(
+        "AAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAQAAAAD9Ai6ZfJT42rd0Nl8YJeODFgju688SXPzMZvSA369YPwAAAAAAAAAAAA9CQAAAAAAAAAAA",
+      );
+    });
+  });
 });
diff --git a/libs/coin-modules/coin-stellar/src/api/index.ts b/libs/coin-modules/coin-stellar/src/api/index.ts
@@ -4,7 +4,7 @@ import {
   broadcast,
   combine,
   craftTransaction,
-  // estimateFees,
+  estimateFees,
   getBalance,
   listOperations,
   lastBlock,
@@ -17,7 +17,7 @@ export function createApi(config: StellarConfig): Api {
     broadcast,
     combine: compose,
     craftTransaction: craft,
-    estimateFees: () => Promise.reject(new Error("Method not supported")),
+    estimateFees,
     getBalance,
     lastBlock,
     listOperations,

diff --git a/libs/coin-modules/coin-stellar/src/logic/combine.ts b/libs/coin-modules/coin-stellar/src/logic/combine.ts
@@ -1,13 +1,7 @@
-import { Transaction as StellarSdkTransaction } from "@stellar/stellar-sdk";
-
-// https://developers.stellar.org/docs/learn/encyclopedia/network-configuration/network-passphrases
-// Mainnet
-const NETWORK_PASSPHRASE = "Public Global Stellar Network ; September 2015";
-// Testnet
-// const NETWORK_PASSPHRASE = "Test SDF Network ; September 2015";
+import { Networks, Transaction as StellarSdkTransaction } from "@stellar/stellar-sdk";
 
 export function combine(transaction: string, signature: string, publicKey: string): string {
-  const unsignedTx = new StellarSdkTransaction(transaction, NETWORK_PASSPHRASE);
+  const unsignedTx = new StellarSdkTransaction(transaction, Networks.PUBLIC);
   unsignedTx.addSignature(publicKey, signature);
   return unsignedTx.toXDR();
 }
diff --git a/libs/coin-modules/coin-stellar/src/logic/estimateFees.ts b/libs/coin-modules/coin-stellar/src/logic/estimateFees.ts
@@ -0,0 +1,6 @@
+import { fetchBaseFee } from "../network";
+
+export async function estimateFees(): Promise<bigint> {
+  const fees = await fetchBaseFee();
+  return BigInt(fees.recommendedFee);
+}
diff --git a/libs/coin-modules/coin-stellar/src/logic/index.ts b/libs/coin-modules/coin-stellar/src/logic/index.ts
@@ -1,7 +1,7 @@
 export { broadcast } from "./broadcast";
 export { combine } from "./combine";
 export { craftTransaction } from "./craftTransaction";
-// export { estimateFees } from "./estimateFees";
+export { estimateFees } from "./estimateFees";
 export { getBalance } from "./getBalance";
 export { lastBlock } from "./lastBlock";
 export { listOperations } from "./listOperations";