Almost everything works!

Author: SamWilsn

src/glue.ts

@@ -83,6 +83,7 @@ class MetaMaskAndroidDriver {
     private running: boolean;
     private windowWatcher: Promise<void>;
     private readonly glue: MetaMaskAndroidGlue;
+    private lastActive: DOMHighResTimeStamp;
 
     private constructor(
         driver: Browser,
@@ -94,6 +95,7 @@ class MetaMaskAndroidDriver {
         this.windowWatcher = this.watchWindows();
         this.glue = glue;
         this.capabilities = caps;
+        this.lastActive = performance.now();
     }
 
     public static async create(
@@ -125,6 +127,12 @@ class MetaMaskAndroidDriver {
         return new MetaMaskAndroidDriver(driver, glue, capabilities);
     }
 
+    private async activateApp(driver: Browser): Promise<void> {
+        await driver.executeScript("mobile: startActivity", [
+            { intent: "io.metamask/io.metamask.MainActivity" },
+        ]);
+    }
+
     public async unlockWithPassword(driver: Browser): Promise<void> {
         const passwordTxt = await driver.$(
             '//android.widget.EditText[@resource-id="login-password-input"]',
@@ -140,9 +148,7 @@ class MetaMaskAndroidDriver {
 
             if (4 !== appState) {
                 // The app is not in the foreground.
-                await driver.executeScript("mobile: startActivity", [
-                    { intent: "io.metamask/io.metamask.MainActivity" },
-                ]);
+                this.activateApp(driver);
             }
 
             try {
@@ -297,20 +303,32 @@ class MetaMaskAndroidDriver {
         );
     }
 
-    private async emitSignMessage(
-        driver: Browser,
-        handle: string,
-    ): Promise<void> {
+    private async emitSignMessage(driver: Browser): Promise<Event> {
         logger.debug("emitting signmessage");
 
-        throw new Error("emitSignMessage: not implemented");
+        const message = await driver
+            .$(
+                '//android.widget.TextView[@text="Message:"]/following-sibling::android.widget.TextView[@text]',
+            )
+            .getAttribute("text")
+            .then((text) => text.trim());
 
+        const uuid = crypto.randomUUID();
         this.glue.emit(
             "signmessage",
-            new SignMessageEvent(handle, {
-                message: "TODO",
+            new SignMessageEvent(uuid, {
+                message,
             }),
         );
+        return { uuid };
+    }
+
+    private isPersonalSignModal(driver: Browser): Promise<boolean> {
+        return driver
+            .$(
+                '//android.view.ViewGroup[@resource-id="personal-signature-request"]',
+            )
+            .isExisting();
     }
 
     private async isSendTransactionModal(driver: Browser): Promise<boolean> {
@@ -319,16 +337,11 @@ class MetaMaskAndroidDriver {
         );
         const pillExists = pill.isExisting();
 
-        // TODO: find a better indicator of SendTransaction...
-        /*
-        const changes = await driver.$(
-            '//android.widget.TextView[@text="Estimated changes"]',
-        );
-        const changesExists = changes.isExisting();
-        */
+        const toExists = driver
+            .$('//android.widget.TextView[@text="To:"]')
+            .isExisting();
 
-        const changesExists = Promise.resolve(true);
-        return (await pillExists) && (await changesExists);
+        return (await pillExists) && (await toExists);
     }
 
     private async isConnectAccountModal(driver: Browser): Promise<boolean> {
@@ -352,6 +365,10 @@ class MetaMaskAndroidDriver {
                 active: this.isSendTransactionModal(driver),
                 handler: (b: Browser) => this.emitSendTransaction(b),
             },
+            {
+                active: this.isPersonalSignModal(driver),
+                handler: (b: Browser) => this.emitSignMessage(b),
+            },
         ];
 
         let handler = null;
@@ -387,11 +404,24 @@ class MetaMaskAndroidDriver {
                         { appId: "io.metamask" },
                     ]);
 
+                const now = performance.now();
+
                 if (4 !== appState) {
                     // The app is not in the foreground.
+
+                    if (now - this.lastActive > 30000.0) {
+                        // Need to flip back to the app every so often to check
+                        // for events.
+                        this.lastActive = now; // Prevent spamming.
+                        await this.driver.lock(async (driver) => {
+                            await this.activateApp(driver);
+                        });
+                    }
                     continue;
                 }
 
+                this.lastActive = now;
+
                 await this.driver.lock(async (driver) => {
                     this.pendingEvent = await this.event(driver);
                 });
@@ -602,6 +632,19 @@ export class MetaMaskAndroidGlue extends Glue {
             );
             await nameEdit.addValue(chainName);
 
+            const chainIdEdit = await driver.$(
+                '//android.widget.EditText[@resource-id="input-chain-id"]',
+            );
+            while (true) {
+                try {
+                    await chainIdEdit.clearValue();
+                    await chainIdEdit.addValue(action.chainId);
+                    break;
+                } catch (_) {
+                    // Sometimes MetaMask is fast enough to populate this field.
+                }
+            }
+
             const rpcDrop = await driver.$(
                 '//android.view.ViewGroup[@resource-id="drop-down-rpc-menu"]',
             );
@@ -622,15 +665,6 @@ export class MetaMaskAndroidGlue extends Glue {
             );
             await confirmRpcBtn.click();
 
-            const chainIdEdit = await driver.$(
-                '//android.widget.EditText[@resource-id="input-chain-id"]',
-            );
-            try {
-                await chainIdEdit.addValue(action.chainId);
-            } catch (_) {
-                // Sometimes MetaMask is fast enough to populate this field.
-            }
-
             const symbolEdit = await driver.$(
                 '//android.widget.EditText[@resource-id="input-network-symbol"]',
             );
@@ -704,7 +738,18 @@ export class MetaMaskAndroidGlue extends Glue {
     override async signMessage(action: SignMessage): Promise<void> {
         const cb = await this.driver;
         await cb.lock(async (driver) => {
-            throw new Error("signMessage: not implemented");
+            let btnXpath;
+            if (action.action === "reject") {
+                btnXpath =
+                    '//android.widget.Button[@content-desc="request-signature-cancel-button"]';
+            } else if (action.action === "approve") {
+                btnXpath =
+                    '//android.widget.Button[@content-desc="request-signature-confirm-button"]';
+            } else {
+                throw new Error("signMessage: not implemented");
+            }
+
+            await driver.$(btnXpath).click();
         }, action.id);
     }