From 16b13ea8fc5e7f63ce08bc6baa2087cab9c8089f Mon Sep 17 00:00:00 2001
From: Kevin Ingersoll <kingersoll@gmail.com>
Date: Tue, 3 Oct 2023 15:53:04 +0100
Subject: [PATCH] fix(common): workaround for zero base fee (#1689)

---
 .changeset/chilly-kangaroos-clap.md      | 5 +++++
 packages/common/src/chains/mudFoundry.ts | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/chilly-kangaroos-clap.md

diff --git a/.changeset/chilly-kangaroos-clap.md b/.changeset/chilly-kangaroos-clap.md
new file mode 100644
index 0000000000..0d98706e68
--- /dev/null
+++ b/.changeset/chilly-kangaroos-clap.md
@@ -0,0 +1,5 @@
+---
+"@latticexyz/common": patch
+---
+
+Adds viem workaround for zero base fee used by MUD's anvil config
diff --git a/packages/common/src/chains/mudFoundry.ts b/packages/common/src/chains/mudFoundry.ts
index 1754534d8d..29705d4684 100644
--- a/packages/common/src/chains/mudFoundry.ts
+++ b/packages/common/src/chains/mudFoundry.ts
@@ -4,6 +4,7 @@ import { MUDChain } from "./types";
 export const mudFoundry = {
   ...foundry,
   fees: {
-    defaultPriorityFee: 0n,
+    // This is intentionally defined as a function as a workaround for https://github.com/wagmi-dev/viem/pull/1280
+    defaultPriorityFee: () => 0n,
   },
 } as const satisfies MUDChain;