From 0435527671109c7b2a933612076ee40a10b7981a Mon Sep 17 00:00:00 2001
From: Equious <equious@gmail.com>
Date: Thu, 11 Jun 2026 10:09:17 -0600
Subject: [PATCH] Add BattleChain mainnet (chain-id 626)

ZKsync-based Ethereum L2 by Cyfrin. Adds the chain to chains.yaml
(grpcId 1168, next free in the 1xxx mainnet range) and chains-meta.yaml
(ETH currency + explorer).

Uses method-spec: "zksync" since BattleChain runs the matter-labs
ZK-stack node software. expected-block-time 250ms. lower-bounds
reference block 1 (hash 0x8fbda1...880c7f), captured from the live
mainnet RPC.
---
 chains-meta.yaml |  7 +++++++
 chains.yaml      | 26 ++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/chains-meta.yaml b/chains-meta.yaml
index 91b3fcc..a4a1aae 100644
--- a/chains-meta.yaml
+++ b/chains-meta.yaml
@@ -1356,3 +1356,10 @@
   chain-id: 7080969
   explorers:
     - https://explorer.humanity.org/testnet
+- currency:
+    name: Ether
+    symbol: ETH
+    decimals: 18
+  chain-id: 626
+  explorers:
+    - https://explorer.battlechain.com
diff --git a/chains.yaml b/chains.yaml
index 4789b60..5f00df4 100644
--- a/chains.yaml
+++ b/chains.yaml
@@ -4228,3 +4228,29 @@ chain-settings:
           short-names: [humanity-testnet]
           chain-id: 0x6c0c09
           grpcId: 10202
+    - id: battlechain
+      label: BattleChain
+      type: eth
+      settings:
+        method-spec: "zksync"
+        expected-block-time: 250ms
+        allow-pruning-requirement: true
+        lags:
+          syncing: 70
+          lagging: 50
+        options:
+          validate-peers: false
+      chains:
+        - id: Mainnet
+          priority: 100
+          code: BATTLECHAIN_MAINNET
+          short-names: [battlechain, battlechain-mainnet]
+          chain-id: 0x272
+          grpcId: 1168
+          lower-bounds:
+            tx:
+              block: 1
+              hash: "0x8fbda1d247e887141030e1ef1774dcba268180d114d83c9b1e81fa998f880c7f"
+            receipts:
+              block: 1
+              hash: "0x8fbda1d247e887141030e1ef1774dcba268180d114d83c9b1e81fa998f880c7f"