alt safe

src/lib/alt-safe.ts

@@ -0,0 +1,94 @@
+import SafeApiKit, { SafeInfoResponse } from "@safe-global/api-kit";
+import { Safe4337Pack } from "@safe-global/relay-kit";
+import EthSafeOperation from "@safe-global/relay-kit/dist/src/packs/safe-4337/SafeOperation";
+import { calculateSafeUserOperationHash } from "@safe-global/relay-kit/dist/src/packs/safe-4337/utils";
+import { ethers } from "ethers";
+import { getDeployment } from "./safe";
+import { getSafeModuleSetupDeployment } from "@safe-global/safe-modules-deployments";
+
+const isRelevantSafe = (safe: SafeInfoResponse, moduleAddress: string) =>
+  safe.threshold === 1 && safe.fallbackHandler === moduleAddress;
+
+export async function existingSafe(
+  signer: string,
+  chainId: bigint,
+  moduleAddress: string
+): Promise<string | undefined> {
+  const apiKit = new SafeApiKit({
+    chainId,
+  });
+  const safes = (await apiKit.getSafesByOwner(signer)).safes;
+  const safeInfos = await Promise.all(
+    safes.map((safeAddress) => apiKit.getSafeInfo(safeAddress))
+  );
+  const relevantSafes = safeInfos.filter((info) =>
+    isRelevantSafe(info, moduleAddress)
+  );
+  console.log("Relevant Safes", relevantSafes);
+  if (relevantSafes.length > 0) {
+    if (relevantSafes.length > 1) {
+      console.warn(
+        `Found multiple relevant Safes for ${signer} - using the first`
+      );
+    }
+    return relevantSafes[0].address;
+  }
+}
+
+export async function loadSafeKit(
+  rpcUrl: string,
+  bundlerUrl: string,
+  nearSigner: string
+): Promise<Safe4337Pack> {
+  const provider = new ethers.JsonRpcProvider(rpcUrl);
+  const [safeModuleAddress, network] = await Promise.all([
+    getSafeModuleAddress(provider),
+    provider.getNetwork(),
+  ]);
+  const safeAddress = await existingSafe(
+    nearSigner,
+    network.chainId,
+    safeModuleAddress
+  );
+  let options = safeAddress
+    ? { safeAddress }
+    : {
+        owners: [nearSigner],
+        threshold: 1,
+      };
+  const safe4337Pack = await Safe4337Pack.init({
+    provider: rpcUrl,
+    bundlerUrl,
+    // Error: Incompatibility detected: Safe modules version 0.3.0 is not supported.
+    // The SDK can use 0.2.0 only.
+    // safeModulesVersion: "0.3.0",
+    options,
+  });
+  return safe4337Pack;
+}
+
+async function getSafeModuleAddress(
+  provider: ethers.JsonRpcProvider
+): Promise<string> {
+  return (
+    await getDeployment(getSafeModuleSetupDeployment, {
+      provider,
+      version: "0.2.0",
+    })
+  ).getAddress();
+}
+
+// This should be part of the kit!
+export async function getSafeOpHash(
+  provider: ethers.JsonRpcProvider,
+  safeKit: Safe4337Pack,
+  safeOp: EthSafeOperation
+) {
+  return calculateSafeUserOperationHash(
+    safeOp.data,
+    BigInt(await safeKit.getChainId()),
+    // The safe isn't deployed so we have to fetch the fallback Handler on our own:
+    // await safeKit.protocolKit.getFallbackHandler()
+    await getSafeModuleAddress(provider)
+  );
+}