Feat: Fordefi wallet module

src/build_npm.ts

@@ -32,6 +32,10 @@ await build({
       name: "./modules/bitget",
       path: "./sdk/modules/bitget.module.ts",
     },
+    {
+      name: "./modules/fordefi",
+      path: "./sdk/modules/fordefi.module.ts",
+    },
     {
       name: "./modules/freighter",
       path: "./sdk/modules/freighter.module.ts",

src/deno.json

@@ -40,6 +40,7 @@
     "./sdk": "./sdk/mod.ts",
     "./modules/albedo": "./sdk/modules/albedo.module.ts",
     "./modules/bitget": "./sdk/modules/bitget.module.ts",
+    "./modules/fordefi": "./sdk/modules/fordefi.module.ts",
     "./modules/freighter": "./sdk/modules/freighter.module.ts",
     "./modules/hana": "./sdk/modules/hana.module.ts",
     "./modules/hotwallet": "./sdk/modules/hotwallet.module.ts",

src/sdk/modules/fordefi.module.ts

@@ -0,0 +1,205 @@
+import { type ModuleInterface, ModuleType } from "../../types/mod.ts";
+import { parseError } from "../utils.ts";
+
+/**
+ * Fordefi Wallet module for Stellar Wallets Kit.
+ *
+ * The Fordefi browser extension can optionally impersonate the Freighter wallet
+ * (controlled by a user-facing toggle in extension settings). When impersonation
+ * is enabled, the extension listens for the standard Freighter postMessage
+ * protocol (FREIGHTER_EXTERNAL_MSG_REQUEST / FREIGHTER_EXTERNAL_MSG_RESPONSE)
+ * so that dapps using @stellar/freighter-api work transparently.
+ *
+ * This module reuses that same postMessage protocol to communicate with the
+ * extension, while detecting Fordefi specifically via window.FordefiProviders
+ * (which the extension always injects regardless of impersonation settings).
+ * This allows the kit to show "Fordefi" as a distinct wallet option even when
+ * Freighter impersonation is active.
+ */
+
+const FREIGHTER_EXTERNAL_MSG_REQUEST = "FREIGHTER_EXTERNAL_MSG_REQUEST";
+const FREIGHTER_EXTERNAL_MSG_RESPONSE = "FREIGHTER_EXTERNAL_MSG_RESPONSE";
+
+declare const window: Window &
+	typeof globalThis & {
+		isFordefi?: boolean;
+		FordefiProviders?: {
+			StellarProvider?: unknown;
+		};
+	};
+
+let messageCounter = 0;
+
+function sendFreighterMessage<T>(
+	type: string,
+	params?: Record<string, unknown>
+): Promise<T> {
+	return new Promise((resolve, reject) => {
+		const messageId = ++messageCounter;
+
+		const handler = (event: MessageEvent) => {
+			if (event.source !== window) return;
+			if (event.data?.source !== FREIGHTER_EXTERNAL_MSG_RESPONSE) return;
+			// Freighter uses "messagedId" (typo with extra 'd') in responses
+			if (event.data?.messagedId !== messageId) return;
+
+			window.removeEventListener("message", handler);
+
+			if (event.data.apiError) {
+				reject(event.data.apiError);
+			} else {
+				resolve(event.data as T);
+			}
+		};
+
+		window.addEventListener("message", handler);
+
+		window.postMessage(
+			{
+				source: FREIGHTER_EXTERNAL_MSG_REQUEST,
+				messageId,
+				type,
+				...params,
+			},
+			window.location.origin
+		);
+	});
+}
+
+export const FORDEFI_ID = "fordefi";
+
+export class FordefiModule implements ModuleInterface {
+	moduleType: ModuleType = ModuleType.HOT_WALLET;
+
+	productId: string = FORDEFI_ID;
+	productName: string = "Fordefi";
+	productUrl: string = "https://www.fordefi.com";
+	productIcon: string = "https://stellar.creit.tech/wallet-icons/fordefi.png";
+
+	async runChecks(): Promise<void> {
+		if (!(await this.isAvailable())) {
+			throw new Error("Fordefi is not installed");
+		}
+	}
+
+	async isAvailable(): Promise<boolean> {
+		return (
+			typeof window !== "undefined" &&
+			!!window.FordefiProviders?.StellarProvider
+		);
+	}
+
+	async getAddress(): Promise<{ address: string }> {
+		try {
+			await this.runChecks();
+
+			const { publicKey } = await sendFreighterMessage<{ publicKey: string }>(
+				"REQUEST_ACCESS"
+			);
+
+			if (!publicKey) {
+				return Promise.reject({
+					code: -3,
+					message: "Failed to get address from Fordefi.",
+				});
+			}
+
+			return { address: publicKey };
+		} catch (e) {
+			throw parseError(e);
+		}
+	}
+
+	async signTransaction(
+		xdr: string,
+		opts?: {
+			networkPassphrase?: string;
+			address?: string;
+			path?: string;
+		}
+	): Promise<{ signedTxXdr: string; signerAddress?: string }> {
+		try {
+			await this.runChecks();
+
+			const { signedTransaction, signerAddress } = await sendFreighterMessage<{
+				signedTransaction: string;
+				signerAddress: string;
+			}>("SUBMIT_TRANSACTION", {
+				transactionXdr: xdr,
+				networkPassphrase: opts?.networkPassphrase,
+				accountToSign: opts?.address,
+			});
+
+			if (!signedTransaction) {
+				return Promise.reject({
+					code: -3,
+					message: "Failed to sign transaction with Fordefi.",
+				});
+			}
+
+			return { signedTxXdr: signedTransaction, signerAddress };
+		} catch (e) {
+			throw parseError(e);
+		}
+	}
+
+	signAuthEntry(): Promise<{
+		signedAuthEntry: string;
+		signerAddress?: string;
+	}> {
+		return Promise.reject({
+			code: -3,
+			message: 'Fordefi does not support the "signAuthEntry" function',
+		});
+	}
+
+	async signMessage(
+		message: string,
+		opts?: {
+			networkPassphrase?: string;
+			address?: string;
+			path?: string;
+		}
+	): Promise<{ signedMessage: string; signerAddress?: string }> {
+		try {
+			await this.runChecks();
+
+			const { signedBlob, signerAddress } = await sendFreighterMessage<{
+				signedBlob: string | null;
+				signerAddress: string;
+			}>("SUBMIT_BLOB", {
+				blob: message,
+				networkPassphrase: opts?.networkPassphrase,
+				accountToSign: opts?.address,
+			});
+
+			if (!signedBlob) {
+				return Promise.reject({
+					code: -3,
+					message: "Failed to sign message with Fordefi.",
+				});
+			}
+
+			return { signedMessage: signedBlob, signerAddress };
+		} catch (e) {
+			throw parseError(e);
+		}
+	}
+
+	async getNetwork(): Promise<{ network: string; networkPassphrase: string }> {
+		try {
+			await this.runChecks();
+
+			const { networkDetails } = await sendFreighterMessage<{
+				networkDetails: { network: string; networkPassphrase: string };
+			}>("REQUEST_NETWORK_DETAILS");
+
+			return {
+				network: networkDetails.network,
+				networkPassphrase: networkDetails.networkPassphrase,
+			};
+		} catch (e) {
+			throw parseError(e);
+		}
+	}
+}

src/sdk/modules/utils.ts

@@ -8,6 +8,7 @@ import { HanaModule } from "./hana.module.ts";
 import { KleverModule } from "./klever.module.ts";
 import { OneKeyModule } from "./onekey.module.ts";
 import { BitgetModule } from "./bitget.module.ts";
+import { FordefiModule } from "./fordefi.module.ts";
 
 /**
  * This method returns all modules that don't require extra configuration before they can be loaded
@@ -22,6 +23,7 @@ export function defaultModules(opts?: {
   const modules: ModuleInterface[] = [
     new AlbedoModule(),
     new FreighterModule(),
+    new FordefiModule(),
     new RabetModule(),
     new xBullModule(),
     new LobstrModule(),