feat(safe): build Safe API Kit instances for different networks

Without this patch we solely rely on the Safe API Kit to figure out the
URL to the Safe Transaction Service. However, this doesn't work for
Filecoin Mainnet and Filecoin Calibration. These networks need an
explicit URL.

Author: pheuberger

src/commands/SafeApiCommand.ts

@@ -1,5 +1,6 @@
 import SafeApiKit from "@safe-global/api-kit";
 
+import { SafeApiStrategyFactory } from "../lib/safe/SafeApiKitStrategy.js";
 import { SupabaseDataService } from "../services/SupabaseDataService.js";
 import { ISafeApiCommand } from "../types/safe-signatures.js";
 
@@ -15,7 +16,8 @@ export abstract class SafeApiCommand implements ISafeApiCommand {
     this.messageHash = messageHash;
     this.chainId = chainId;
     this.dataService = new SupabaseDataService();
-    this.safeApiKit = new SafeApiKit.default({ chainId: BigInt(chainId) });
+    this.safeApiKit =
+      SafeApiStrategyFactory.getStrategy(chainId).createInstance();
   }
 
   abstract execute(): Promise<void>;

src/lib/safe/SafeApiKitStrategy.ts

@@ -0,0 +1,46 @@
+import SafeApiKit from "@safe-global/api-kit";
+
+export interface SafeApiKitStrategy {
+  createInstance(): SafeApiKit.default;
+}
+
+export class FilecoinMainnetStrategy implements SafeApiKitStrategy {
+  createInstance(): SafeApiKit.default {
+    return new SafeApiKit.default({
+      chainId: BigInt(314),
+      txServiceUrl: "https://transaction.safe.filecoin.io/",
+    });
+  }
+}
+
+export class FilecoinTestnetStrategy implements SafeApiKitStrategy {
+  createInstance(): SafeApiKit.default {
+    return new SafeApiKit.default({
+      chainId: BigInt(314159),
+      txServiceUrl: "https://transaction-testnet.safe.filecoin.io/",
+    });
+  }
+}
+
+export class DefaultSafeApiStrategy implements SafeApiKitStrategy {
+  constructor(private chainId: number) {}
+
+  createInstance(): SafeApiKit.default {
+    return new SafeApiKit.default({
+      chainId: BigInt(this.chainId),
+    });
+  }
+}
+
+export class SafeApiStrategyFactory {
+  static getStrategy(chainId: number): SafeApiKitStrategy {
+    switch (chainId) {
+      case 314:
+        return new FilecoinMainnetStrategy();
+      case 314159:
+        return new FilecoinTestnetStrategy();
+      default:
+        return new DefaultSafeApiStrategy(chainId);
+    }
+  }
+}