feat: add Compound v3 Arbitrum USDC lending plugin

typescript/onchain-actions-plugins/registry/src/compound-v3-plugin/index.ts

@@ -0,0 +1,95 @@
+import { 
+  type ActionDefinition, 
+  type EmberPlugin, 
+  type LendingActions, 
+  type SupplyTokensRequest, 
+  type SupplyTokensResponse, 
+  type WithdrawTokensRequest, 
+  type WithdrawTokensResponse,
+  type ChainConfig,
+  PublicEmberPluginRegistry
+} from '../index.js';
+
+const COMP_V3_USDC_COMET = '0x9c4ec768c28520B50860ea7a15bd7213a9fF58bf';
+
+export function getCompoundV3EmberPlugin(): EmberPlugin<'lending'> {
+  return {
+    id: 'compound-v3-arbitrum',
+    type: 'lending',
+    name: 'Compound v3 (Arbitrum)',
+    description: 'Protocol integration for Compound v3 USDC market on Arbitrum.',
+    website: 'https://compound.finance',
+    x: 'https://x.com/compoundfinance',
+    actions: [
+      {
+        id: 'lending-supply',
+        name: 'Supply',
+        description: 'Supply assets to Compound v3',
+        inputTokens: async () => Promise.resolve([{ chainId: '42161', tokens: [] }]), // Simplified for now
+        outputTokens: async () => Promise.resolve([{ chainId: '42161', tokens: [] }]),
+        callback: async (req: SupplyTokensRequest): Promise<SupplyTokensResponse> => {
+          const selector = 'f2b9fdb8';
+          const cleanAsset = req.supplyToken.address.replace('0x', '').toLowerCase().padStart(64, '0');
+          const amountHex = req.amount.toString(16).padStart(64, '0');
+          const data = `0x${selector}${cleanAsset}${amountHex}`;
+
+          return {
+            transactions: [
+              {
+                to: COMP_V3_USDC_COMET,
+                data,
+                value: '0',
+                description: `Supply ${req.amount.toString()} of ${req.supplyToken.symbol} to Compound v3`,
+              },
+            ],
+          };
+        },
+      },
+      {
+        id: 'lending-withdraw',
+        name: 'Withdraw',
+        description: 'Withdraw assets from Compound v3',
+        inputTokens: async () => Promise.resolve([{ chainId: '42161', tokens: [] }]),
+        outputTokens: async () => Promise.resolve([{ chainId: '42161', tokens: [] }]),
+        callback: async (req: WithdrawTokensRequest): Promise<WithdrawTokensResponse> => {
+          const selector = 'f3fef3a3';
+          const cleanAsset = req.tokenToWithdraw.address.replace('0x', '').toLowerCase().padStart(64, '0');
+          const amountHex = req.amount.toString(16).padStart(64, '0');
+          const data = `0x${selector}${cleanAsset}${amountHex}`;
+
+          return {
+            transactions: [
+              {
+                to: COMP_V3_USDC_COMET,
+                data,
+                value: '0',
+                description: `Withdraw ${req.amount.toString()} of ${req.tokenToWithdraw.symbol} from Compound v3`,
+              },
+            ],
+          };
+        },
+      },
+    ],
+    queries: {
+      getPositions: async () => {
+        // Placeholder for position fetching logic
+        return {
+          userReserves: [],
+          totalLiquidityUsd: '0',
+          totalCollateralUsd: '0',
+          totalBorrowsUsd: '0',
+          netWorthUsd: '0',
+          availableBorrowsUsd: '0',
+          currentLoanToValue: '0',
+          currentLiquidationThreshold: '0',
+          healthFactor: '0',
+        };
+      },
+    },
+  };
+}
+
+export function registerCompoundV3(chainConfig: ChainConfig, registry: PublicEmberPluginRegistry) {
+  if (chainConfig.chainId !== 42161) return;
+  registry.registerPlugin(getCompoundV3EmberPlugin());
+}

typescript/onchain-actions-plugins/registry/src/index.ts

@@ -1,3 +1,4 @@
+import { registerCompoundV3 } from './compound-v3-plugin/index.js';
 import { registerAave } from './aave-lending-plugin/index.js';
 import type { ChainConfig } from './chainConfig.js';
 import { PublicEmberPluginRegistry } from './registry.js';
@@ -13,6 +14,7 @@ export function initializePublicRegistry(chainConfigs: ChainConfig[]) {
   for (const chainConfig of chainConfigs) {
     // Create aave plugins for each chain config
     registerAave(chainConfig, registry);
+    registerCompoundV3(chainConfig, registry);
   }
 
   return registry;