From 21009408f4fb07d825c81f6979cc401594ea2a6b Mon Sep 17 00:00:00 2001
From: N V Rakesh Reddy <nvrakeshreddy@bitgo.com>
Date: Mon, 15 Jun 2026 16:51:12 +0530
Subject: [PATCH] feat(statics): add Neo X EVM chain (gasevm/tgasevm)

Add mainnet and testnet Neo X EVM chain definitions to statics, environments,
and cold feature fixtures for CECHO-1349.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 modules/sdk-core/src/bitgo/environments.ts    |  6 ++++
 modules/statics/src/allCoinsAndTokens.ts      | 36 +++++++++++++++++++
 modules/statics/src/base.ts                   |  2 ++
 .../statics/src/networkFeatureMapForTokens.ts | 10 ++++++
 modules/statics/src/networks.ts               | 20 +++++++++++
 .../unit/fixtures/expectedColdFeatures.ts     |  2 ++
 6 files changed, 76 insertions(+)

diff --git a/modules/sdk-core/src/bitgo/environments.ts b/modules/sdk-core/src/bitgo/environments.ts
index 8f210a7718..fa899e7cc5 100644
--- a/modules/sdk-core/src/bitgo/environments.ts
+++ b/modules/sdk-core/src/bitgo/environments.ts
@@ -292,6 +292,9 @@ const mainnetBase: EnvironmentTemplate = {
     xtzevm: {
       baseUrl: 'https://explorer.etherlink.com/api',
     },
+    gasevm: {
+      baseUrl: 'https://neoxscan.ngd.network/api',
+    },
     flow: {
       baseUrl: 'https://evm.flowscan.io',
     },
@@ -509,6 +512,9 @@ const testnetBase: EnvironmentTemplate = {
     xtzevm: {
       baseUrl: 'https://shadownet.explorer.etherlink.com/api',
     },
+    tgasevm: {
+      baseUrl: 'https://neoxt4scan.ngd.network/api',
+    },
     flow: {
       baseUrl: 'https://evm-testnet.flowscan.io',
     },
diff --git a/modules/statics/src/allCoinsAndTokens.ts b/modules/statics/src/allCoinsAndTokens.ts
index 47e195cbef..1f76f0a69e 100644
--- a/modules/statics/src/allCoinsAndTokens.ts
+++ b/modules/statics/src/allCoinsAndTokens.ts
@@ -413,6 +413,24 @@ export const allCoinsAndTokens = [
       CoinFeature.SUPPORTS_ERC20,
     ]
   ),
+  account(
+    '7b83f1e2-28f2-464d-84d0-1d36cc738cae',
+    'gasevm',
+    'Neo X',
+    Networks.main.gasevm,
+    18,
+    UnderlyingAsset.GASEVM,
+    BaseUnit.ETH,
+    [
+      ...EVM_FEATURES,
+      CoinFeature.SHARED_EVM_SIGNING,
+      CoinFeature.SHARED_EVM_SDK,
+      CoinFeature.EVM_COMPATIBLE_IMS,
+      CoinFeature.EVM_COMPATIBLE_UI,
+      CoinFeature.EVM_COMPATIBLE_WP,
+      CoinFeature.SUPPORTS_ERC20,
+    ]
+  ),
   account(
     'e7fdbd6f-93ff-4dda-8a57-81580827188e',
     'txtzevm',
@@ -992,6 +1010,24 @@ export const allCoinsAndTokens = [
       CoinFeature.STAKING,
     ]
   ),
+  account(
+    'c61b81b8-c216-435c-8281-8f8b649e1f94',
+    'tgasevm',
+    'Testnet Neo X',
+    Networks.test.tgasevm,
+    18,
+    UnderlyingAsset.GASEVM,
+    BaseUnit.ETH,
+    [
+      ...EVM_FEATURES,
+      CoinFeature.SHARED_EVM_SIGNING,
+      CoinFeature.SHARED_EVM_SDK,
+      CoinFeature.EVM_COMPATIBLE_IMS,
+      CoinFeature.EVM_COMPATIBLE_UI,
+      CoinFeature.EVM_COMPATIBLE_WP,
+      CoinFeature.SUPPORTS_ERC20,
+    ]
+  ),
   account(
     '9fbfb875-fb80-4a37-b844-48b9e48dfcdd',
     'zeta',
diff --git a/modules/statics/src/base.ts b/modules/statics/src/base.ts
index 0e5da11acb..65c7f41306 100644
--- a/modules/statics/src/base.ts
+++ b/modules/statics/src/base.ts
@@ -65,6 +65,7 @@ export enum CoinFamily {
   FANTOM = 'fantom', // Fantom
   FLR = 'flr',
   FLRP = 'flrp',
+  GASEVM = 'gasevm', // Neo X EVM sidechain (native GAS token)
   H = 'h', // Humanity Protocol
   HASH = 'hash', // Provenance
   HBAR = 'hbar',
@@ -610,6 +611,7 @@ export enum UnderlyingAsset {
   FLRP = 'flrp',
   FLUENTETH = 'fluenteth',
   FANTOM = 'fantom', // Fantom
+  GASEVM = 'gasevm', // Neo X EVM sidechain (native GAS token)
   GTC = 'gtc',
   H = 'h', // Humanity Protocol
   HASH = 'hash', // Provenance
diff --git a/modules/statics/src/networkFeatureMapForTokens.ts b/modules/statics/src/networkFeatureMapForTokens.ts
index 2d9ed583ff..e5b4af91ed 100644
--- a/modules/statics/src/networkFeatureMapForTokens.ts
+++ b/modules/statics/src/networkFeatureMapForTokens.ts
@@ -4,6 +4,7 @@ import {
   ADA_TOKEN_FEATURES,
   APT_FEATURES,
   BSC_TOKEN_FEATURES,
+  EVM_FEATURES,
   POLYGON_TOKEN_FEATURES,
   POLYX_TOKEN_FEATURES,
   SOL_TOKEN_FEATURES,
@@ -22,6 +23,15 @@ export const networkFeatureMapForTokens: Partial<Record<CoinFamily, CoinFeature[
   celo: AccountCoin.DEFAULT_FEATURES,
   eth: AccountCoin.DEFAULT_FEATURES,
   eos: AccountCoin.DEFAULT_FEATURES,
+  gasevm: [
+    ...EVM_FEATURES,
+    CoinFeature.SHARED_EVM_SIGNING,
+    CoinFeature.SHARED_EVM_SDK,
+    CoinFeature.EVM_COMPATIBLE_IMS,
+    CoinFeature.EVM_COMPATIBLE_UI,
+    CoinFeature.EVM_COMPATIBLE_WP,
+    CoinFeature.SUPPORTS_ERC20,
+  ],
   hbar: AccountCoin.DEFAULT_FEATURES,
   opeth: [...AccountCoin.DEFAULT_FEATURES, CoinFeature.EIP1559],
   polygon: POLYGON_TOKEN_FEATURES,
diff --git a/modules/statics/src/networks.ts b/modules/statics/src/networks.ts
index f839754cdb..d88aee9053 100644
--- a/modules/statics/src/networks.ts
+++ b/modules/statics/src/networks.ts
@@ -2431,6 +2431,24 @@ class FlowTestnet extends Testnet implements EthereumNetwork {
   nativeCoinOperationHashPrefix = '545';
 }
 
+class GasEvm extends Mainnet implements EthereumNetwork {
+  name = 'Neo X';
+  family = CoinFamily.GASEVM;
+  explorerUrl = 'https://neoxscan.ngd.network/tx/';
+  accountExplorerUrl = 'https://neoxscan.ngd.network/address/';
+  chainId = 47763;
+  nativeCoinOperationHashPrefix = '47763';
+}
+
+class GasEvmTestnet extends Testnet implements EthereumNetwork {
+  name = 'Testnet Neo X';
+  family = CoinFamily.GASEVM;
+  explorerUrl = 'https://neoxt4scan.ngd.network/tx/';
+  accountExplorerUrl = 'https://neoxt4scan.ngd.network/address/';
+  chainId = 12227332;
+  nativeCoinOperationHashPrefix = '12227332';
+}
+
 class MegaETH extends Mainnet implements EthereumNetwork {
   name = 'MegaETH';
   family = CoinFamily.MEGAETH;
@@ -2742,6 +2760,7 @@ export const Networks = {
     fiat: Object.freeze(new Fiat()),
     fetchai: Object.freeze(new FetchAi()),
     flow: Object.freeze(new Flow()),
+    gasevm: Object.freeze(new GasEvm()),
     flr: Object.freeze(new Flare()),
     flrP: Object.freeze(new FlareP()),
     fluenteth: Object.freeze(new FluentETH()),
@@ -2864,6 +2883,7 @@ export const Networks = {
     fiat: Object.freeze(new FiatTestnet()),
     fetchai: Object.freeze(new FetchAiTestnet()),
     flow: Object.freeze(new FlowTestnet()),
+    tgasevm: Object.freeze(new GasEvmTestnet()),
     flr: Object.freeze(new FlareTestnet()),
     flrP: Object.freeze(new FlarePTestnet()),
     fluenteth: Object.freeze(new FluentETHTestnet()),
diff --git a/modules/statics/test/unit/fixtures/expectedColdFeatures.ts b/modules/statics/test/unit/fixtures/expectedColdFeatures.ts
index 563f4ea564..2194f12f45 100644
--- a/modules/statics/test/unit/fixtures/expectedColdFeatures.ts
+++ b/modules/statics/test/unit/fixtures/expectedColdFeatures.ts
@@ -97,6 +97,7 @@ export const expectedColdFeatures = {
     'fetchai',
     'flow',
     'fluenteth',
+    'gasevm',
     'h',
     'hash',
     'hbarevm',
@@ -175,6 +176,7 @@ export const expectedColdFeatures = {
     'tfetchai',
     'tflow',
     'tfluenteth',
+    'tgasevm',
     'th',
     'thbarevm',
     'themieth',