From 9b53b191b76a34900976cd6f43ae39a9e8816eb8 Mon Sep 17 00:00:00 2001
From: Aaron DeRuvo <aaron.deruvo@clabs.co>
Date: Thu, 24 Jul 2025 12:00:21 -0500
Subject: [PATCH 1/5] add celo sepolia

---
 src/chains/definitions/celoSepolia.ts | 46 +++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 src/chains/definitions/celoSepolia.ts

diff --git a/src/chains/definitions/celoSepolia.ts b/src/chains/definitions/celoSepolia.ts
new file mode 100644
index 0000000000..0804aadede
--- /dev/null
+++ b/src/chains/definitions/celoSepolia.ts
@@ -0,0 +1,46 @@
+import { chainConfig } from '../../celo/chainConfig.js'
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+const sourceId = 11_155_111 // sepolia
+// source https://storage.googleapis.com/cel2-rollup-files/celo-sepolia/deployment-l1.json
+export const celoSepolia = /*#__PURE__*/ defineChain({
+  ...chainConfig,
+  id: 11_142_220,
+  name: 'Celo Sepolia Testnet',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'CELO',
+    symbol: 'S-CELO',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://forno.celo-sepolia.celo-testnet.org'],
+    },
+  },
+  contracts: {
+    ...chainConfig.contracts,
+    multicall3: {
+      address: '0xcA11bde05977b3631167028862bE2a173976CA11',
+      blockCreated: 1,
+    },
+    portal: {
+      [sourceId]: {
+        address: '0x44ae3d41a335a7d05eb533029917aad35662dcc2',
+        blockCreated: 8825790,
+      },
+    },
+    disputeGameFactory: {
+      [sourceId]: {
+        address: '0x57c45d82d1a995f1e135b8d7edc0a6bb5211cfaa',
+        blockCreated: 8825790,
+      },
+    },
+    l1StandardBridge: {
+      [sourceId]: {
+        address: '0xec18a3c30131a0db4246e785355fbc16e2eaf408',
+        blockCreated: 8825790,
+      },
+    },
+  },
+  testnet: true,
+})

From 4cc9a5075db20be20f7e5b0225b950cce38da130 Mon Sep 17 00:00:00 2001
From: Aaron DeRuvo <aaron.deruvo@gmail.com>
Date: Thu, 24 Jul 2025 12:03:04 -0500
Subject: [PATCH 2/5] Create eighty-humans-arrive.md

---
 .changeset/eighty-humans-arrive.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/eighty-humans-arrive.md

diff --git a/.changeset/eighty-humans-arrive.md b/.changeset/eighty-humans-arrive.md
new file mode 100644
index 0000000000..ef0748d029
--- /dev/null
+++ b/.changeset/eighty-humans-arrive.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+add celo sepolia chain

From d9b3577bdedf26a1777de204ac94847207f5af08 Mon Sep 17 00:00:00 2001
From: Aaron DeRuvo <aaron.deruvo@clabs.co>
Date: Tue, 29 Jul 2025 14:00:09 -0600
Subject: [PATCH 3/5] Add block explorer

---
 src/chains/definitions/celoSepolia.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/chains/definitions/celoSepolia.ts b/src/chains/definitions/celoSepolia.ts
index 0804aadede..7f93c636f2 100644
--- a/src/chains/definitions/celoSepolia.ts
+++ b/src/chains/definitions/celoSepolia.ts
@@ -17,6 +17,13 @@ export const celoSepolia = /*#__PURE__*/ defineChain({
       http: ['https://forno.celo-sepolia.celo-testnet.org'],
     },
   },
+  blockExplorers: {
+    default: {
+      name: 'Celo Sepolia Explorer',
+      url: 'https://celo-sepolia.blockscout.com/',
+      apiUrl: 'https://celo-sepolia.blockscout.com/api',
+    },
+  },
   contracts: {
     ...chainConfig.contracts,
     multicall3: {

From d3f9888392e42940faddabb26ab743a8557b67d0 Mon Sep 17 00:00:00 2001
From: Aaron DeRuvo <aaron.deruvo@clabs.co>
Date: Tue, 29 Jul 2025 14:30:05 -0600
Subject: [PATCH 4/5] export celo sepolia

---
 src/chains/index.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/chains/index.ts b/src/chains/index.ts
index 1173e96ae4..d8fa6a2df5 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -90,6 +90,7 @@ export { cannon } from './definitions/cannon.js'
 export { canto } from './definitions/canto.js'
 export { celo } from './definitions/celo.js'
 export { celoAlfajores } from './definitions/celoAlfajores.js'
+export { celoSepolia } from './definitions/celoSepolia.js'
 export { chang } from './definitions/chang.js'
 export { chiliz } from './definitions/chiliz.js'
 export { chips } from './definitions/chips.js'

From eaf1c6c6e6f5ecfb12a85a8639b88424dffadde7 Mon Sep 17 00:00:00 2001
From: jxom <7336481+jxom@users.noreply.github.com>
Date: Wed, 30 Jul 2025 14:51:57 +0100
Subject: [PATCH 5/5] Update eighty-humans-arrive.md

---
 .changeset/eighty-humans-arrive.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.changeset/eighty-humans-arrive.md b/.changeset/eighty-humans-arrive.md
index ef0748d029..f11d549012 100644
--- a/.changeset/eighty-humans-arrive.md
+++ b/.changeset/eighty-humans-arrive.md
@@ -2,4 +2,4 @@
 "viem": patch
 ---
 
-add celo sepolia chain
+Added Celo Sepolia chain.