From 84fbdaa1e95073b8f313a48fc510dbb1cee9b006 Mon Sep 17 00:00:00 2001
From: gregfromstl <gregfromstl@gmail.com>
Date: Wed, 26 Mar 2025 10:27:54 -0700
Subject: [PATCH 1/2] fix: account for bigint values in engine typed data

---
 .changeset/social-shoes-start.md              | 5 +++++
 packages/thirdweb/src/wallets/engine/index.ts | 7 ++++---
 2 files changed, 9 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/social-shoes-start.md

diff --git a/.changeset/social-shoes-start.md b/.changeset/social-shoes-start.md
new file mode 100644
index 00000000000..c717542b9ca
--- /dev/null
+++ b/.changeset/social-shoes-start.md
@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Account for bigint values in engine wallet typed data
diff --git a/packages/thirdweb/src/wallets/engine/index.ts b/packages/thirdweb/src/wallets/engine/index.ts
index 7b29d9c1d89..3f6635e3c6a 100644
--- a/packages/thirdweb/src/wallets/engine/index.ts
+++ b/packages/thirdweb/src/wallets/engine/index.ts
@@ -1,3 +1,4 @@
+import { stringify } from "../../utils/json.js";
 import type { Chain } from "../../chains/types.js";
 import type { Hex } from "../../utils/encoding/hex.js";
 import { toHex } from "../../utils/encoding/hex.js";
@@ -108,7 +109,7 @@ export function engineAccount(options: EngineAccountOptions): Account {
       const engineRes = await fetch(ENGINE_URL, {
         method: "POST",
         headers,
-        body: JSON.stringify(engineData),
+        body: stringify(engineData),
       });
       if (!engineRes.ok) {
         const body = await engineRes.text();
@@ -178,7 +179,7 @@ export function engineAccount(options: EngineAccountOptions): Account {
       const engineRes = await fetch(ENGINE_URL, {
         method: "POST",
         headers,
-        body: JSON.stringify({
+        body: stringify({
           message: engineMessage,
           isBytes,
           chainId: chain?.id,
@@ -201,7 +202,7 @@ export function engineAccount(options: EngineAccountOptions): Account {
       const engineRes = await fetch(ENGINE_URL, {
         method: "POST",
         headers,
-        body: JSON.stringify({
+        body: stringify({
           domain: _typedData.domain,
           types: _typedData.types,
           value: _typedData.message,

From 34946625b6e410960e8b05655beac420d2af35bb Mon Sep 17 00:00:00 2001
From: gregfromstl <gregfromstl@gmail.com>
Date: Wed, 26 Mar 2025 10:28:36 -0700
Subject: [PATCH 2/2] lint

---
 packages/thirdweb/src/wallets/engine/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/thirdweb/src/wallets/engine/index.ts b/packages/thirdweb/src/wallets/engine/index.ts
index 3f6635e3c6a..1d982d22023 100644
--- a/packages/thirdweb/src/wallets/engine/index.ts
+++ b/packages/thirdweb/src/wallets/engine/index.ts
@@ -1,7 +1,7 @@
-import { stringify } from "../../utils/json.js";
 import type { Chain } from "../../chains/types.js";
 import type { Hex } from "../../utils/encoding/hex.js";
 import { toHex } from "../../utils/encoding/hex.js";
+import { stringify } from "../../utils/json.js";
 import type { Account, SendTransactionOption } from "../interfaces/wallet.js";
 
 /**