Feature: eCash integration

packages/extension/package.json

@@ -63,7 +63,10 @@
     "bip39": "^3.1.0",
     "bitcoinjs-lib": "^6.1.7",
     "bs58": "^6.0.0",
+    "chronik-client": "^4.1.0",
     "concurrently": "^9.2.1",
+    "ecash-lib": "^4.7.0",
+    "ecash-wallet": "^5.1.0",
     "echarts": "^6.0.0",
     "ethereum-cryptography": "^2.2.1",
     "ethereumjs-abi": "^0.6.8",

packages/extension/src/libs/activity-state/wrap-activity-handler.ts

@@ -1,18 +1,28 @@
 import ActivityState from '.';
 import { ActivityHandlerType } from './types';
-const CACHE_TTL = 1000 * 60 * 5; // 5 mins
+
+const CACHE_TTL = 1000 * 60 * 5;
+const ECASH_CACHE_TTL = 1000 * 3;
+
 export default (activityHandler: ActivityHandlerType): ActivityHandlerType => {
   const returnFunction: ActivityHandlerType = async (network, address) => {
     const activityState = new ActivityState();
+
     const options = {
       address: address,
       network: network.name,
     };
+
+    // Use shorter cache TTL for eCash due to faster finality
+    const isECash = network.name === 'XEC' || network.name === 'XECTest';
+    const cacheTTL = isECash ? ECASH_CACHE_TTL : CACHE_TTL;
+
     const [activities, cacheTime] = await Promise.all([
       activityState.getAllActivities(options),
       activityState.getCacheTime(options),
     ]);
-    if (cacheTime + CACHE_TTL < new Date().getTime()) {
+
+    if (cacheTime + cacheTTL < new Date().getTime()) {
       const liveActivities = await activityHandler(network, address);
       if (!activities.length) {
         await activityState.addActivities(liveActivities, options);

packages/extension/src/libs/background/index.ts

@@ -25,6 +25,7 @@ import {
   sendToTab,
   newAccount,
   lock,
+  ecashSign,
 } from './internal';
 import { handlePersistentEvents } from './external';
 import SettingsState from '../settings-state';
@@ -51,6 +52,7 @@ class BackgroundHandler {
       [ProviderName.kadena]: {},
       [ProviderName.solana]: {},
       [ProviderName.massa]: {},
+      [ProviderName.ecash]: {},
     };
     this.#providers = Providers;
     this.#geoRestricted = undefined;
@@ -106,6 +108,15 @@ class BackgroundHandler {
         error: JSON.stringify(getCustomError('Enkrypt: not implemented')),
       };
     }
+    if (_provider === ProviderName.ecash) {
+      return {
+        error: JSON.stringify(
+          getCustomError(
+            'Enkrypt: eCash does not support external requests in this wallet',
+          ),
+        ),
+      };
+    }
     if (this.#geoRestricted !== undefined && this.#geoRestricted) {
       return {
         error: JSON.stringify(
@@ -186,6 +197,8 @@ class BackgroundHandler {
       case InternalMethods.getNewAccount:
       case InternalMethods.saveNewAccount:
         return newAccount(this.#keyring, message);
+      case InternalMethods.ecashSign:
+        return ecashSign(this.#keyring, message);
       default:
         return Promise.resolve({
           error: getCustomError(