From 08cc48910df351d068c1ce224d4102f40cb1dce1 Mon Sep 17 00:00:00 2001
From: kumaryash90 <kumaryashcse@gmail.com>
Date: Mon, 3 Feb 2025 17:56:14 +0000
Subject: [PATCH] [SDK] Update implementation addr extraction logic (#6093)
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TOOL-3258

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---

## PR-Codex overview
This PR introduces support for EIP-7702 by adding functionality to extract the implementation address from a specific bytecode pattern. It includes a new utility function and a corresponding test case.

### Detailed summary
- Added EIP-7702 support in `extractMinimalProxyImplementationAddress.ts` to extract the implementation address from bytecode.
- Implemented a check for bytecode length and prefix.
- Added a test case in `extractMinimalProxyImplementationAddress.test.ts` to validate the new functionality.

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---
 .changeset/thick-kangaroos-smoke.md                         | 5 +++++
 .../extractMinimalProxyImplementationAddress.test.ts        | 6 ++++++
 .../bytecode/extractMinimalProxyImplementationAddress.ts    | 6 ++++++
 3 files changed, 17 insertions(+)
 create mode 100644 .changeset/thick-kangaroos-smoke.md

diff --git a/.changeset/thick-kangaroos-smoke.md b/.changeset/thick-kangaroos-smoke.md
new file mode 100644
index 00000000000..c885e884774
--- /dev/null
+++ b/.changeset/thick-kangaroos-smoke.md
@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+7702 delegation designator
diff --git a/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.test.ts b/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.test.ts
index 8efe9398594..50a9a4e9b3c 100644
--- a/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.test.ts
+++ b/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.test.ts
@@ -51,6 +51,12 @@ describe("extractMinimalProxyImplementationAddress", () => {
     expect(result).toBe("0xbebebebebebebebebebebebebebebebebebebebe");
   });
 
+  it("should extract address from EIP-7702 delegation designator", () => {
+    const bytecode = "0xef0100bebebebebebebebebebebebebebebebebebebebe";
+    const result = extractMinimalProxyImplementationAddress(bytecode);
+    expect(result).toBe("0xbebebebebebebebebebebebebebebebebebebebe");
+  });
+
   it("should return undefined for non-matching bytecode", () => {
     const bytecode =
       "0x60806040526000805534801561001457600080fd5b50610150806100246000396000f3fe";
diff --git a/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.ts b/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.ts
index d1b3546e7a2..9c6b3646ca9 100644
--- a/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.ts
+++ b/packages/thirdweb/src/utils/bytecode/extractMinimalProxyImplementationAddress.ts
@@ -54,5 +54,11 @@ export function extractMinimalProxyImplementationAddress(
     return `0x${implementationAddress}`;
   }
 
+  // EIP-7702 - https://eips.ethereum.org/EIPS/eip-7702#abstract
+  if (bytecode.length === 48 && bytecode.startsWith("0xef0100")) {
+    const implementationAddress = bytecode.slice(8, 48);
+    return `0x${implementationAddress}`;
+  }
+
   return undefined;
 }