From ac15c77327487a54ea1207c192e22c2dfd75c9ac Mon Sep 17 00:00:00 2001
From: Manas Ladha <manasladha035@bitgo.com>
Date: Tue, 21 Apr 2026 18:14:48 +0530
Subject: [PATCH] feat(sdk-coin-eth): add registerWithCoinMap for dynamic token
 registration

TICKET: CSHLD-24

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 modules/sdk-coin-eth/src/register.ts       | 14 +++-
 modules/sdk-coin-eth/test/unit/register.ts | 81 ++++++++++++++++++++++
 2 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 modules/sdk-coin-eth/test/unit/register.ts

diff --git a/modules/sdk-coin-eth/src/register.ts b/modules/sdk-coin-eth/src/register.ts
index 7420142e10..4b51ff1c3b 100644
--- a/modules/sdk-coin-eth/src/register.ts
+++ b/modules/sdk-coin-eth/src/register.ts
@@ -1,4 +1,4 @@
-import { BitGoBase } from '@bitgo/sdk-core';
+import { BitGoBase, GlobalCoinFactory } from '@bitgo/sdk-core';
 import { Erc20Token } from './erc20Token';
 import { Eth } from './eth';
 import { Gteth } from './gteth';
@@ -21,7 +21,19 @@ export const register = (sdk: BitGoBase): void => {
 };
 
 export const registerWithCoinMap = (sdk: BitGoBase, coinMap: CoinMap): void => {
+  sdk.register('eth', Eth.createInstance);
+  sdk.register('gteth', Gteth.createInstance);
+  sdk.register('teth', Teth.createInstance);
+  sdk.register('hteth', Hteth.createInstance);
+  Erc721Token.createTokenConstructors().forEach(({ name, coinConstructor }) => {
+    sdk.register(name, coinConstructor);
+  });
+
+  // Registration for ERC20 tokens from the coin map (includes both hardcoded and dynamic tokens from AMS).
   Erc20Token.createTokenConstructors(getFormattedErc20Tokens(coinMap)).forEach(({ name, coinConstructor }) => {
     sdk.register(name, coinConstructor);
+    if (coinMap.has(name)) {
+      GlobalCoinFactory.registerToken(coinMap.get(name), coinConstructor);
+    }
   });
 };
diff --git a/modules/sdk-coin-eth/test/unit/register.ts b/modules/sdk-coin-eth/test/unit/register.ts
new file mode 100644
index 0000000000..5cfecadfa5
--- /dev/null
+++ b/modules/sdk-coin-eth/test/unit/register.ts
@@ -0,0 +1,81 @@
+import sinon from 'sinon';
+import assert from 'assert';
+import { BitGoAPI } from '@bitgo/sdk-api';
+import { GlobalCoinFactory } from '@bitgo/sdk-core';
+import { coins, Erc20Coin } from '@bitgo/statics';
+import { register, registerWithCoinMap } from '../../src/register';
+import { Erc20Token } from '../../src/erc20Token';
+import { Erc721Token } from '../../src/erc721Token';
+
+describe('ETH Register', function () {
+  let bitgo: BitGoAPI;
+  let registerSpy: sinon.SinonSpy;
+  let registerTokenSpy: sinon.SinonSpy;
+
+  beforeEach(function () {
+    bitgo = new BitGoAPI({ env: 'test' });
+    registerSpy = sinon.spy(bitgo, 'register');
+    registerTokenSpy = sinon.spy(GlobalCoinFactory, 'registerToken');
+  });
+
+  afterEach(function () {
+    registerSpy.restore();
+    registerTokenSpy.restore();
+  });
+
+  describe('register', function () {
+    it('should register base coins and token constructors', function () {
+      register(bitgo);
+
+      const registeredNames = registerSpy.getCalls().map((call) => call.args[0]);
+
+      // Base coins should be registered
+      assert.ok(registeredNames.includes('eth'));
+      assert.ok(registeredNames.includes('gteth'));
+      assert.ok(registeredNames.includes('teth'));
+      assert.ok(registeredNames.includes('hteth'));
+
+      // ERC20 and ERC721 tokens should be registered
+      const erc20Count = Erc20Token.createTokenConstructors().length;
+      const erc721Count = Erc721Token.createTokenConstructors().length;
+      assert.strictEqual(registerSpy.callCount, 4 + erc20Count + erc721Count);
+    });
+  });
+
+  describe('registerWithCoinMap', function () {
+    it('should call register internally for base coins and tokens', function () {
+      registerWithCoinMap(bitgo, coins);
+
+      const registeredNames = registerSpy.getCalls().map((call) => call.args[0]);
+
+      // Base coins should be registered via register()
+      assert.ok(registeredNames.includes('eth'));
+      assert.ok(registeredNames.includes('gteth'));
+      assert.ok(registeredNames.includes('teth'));
+      assert.ok(registeredNames.includes('hteth'));
+    });
+
+    it('should add dynamic ERC20 tokens to the global coin map', function () {
+      registerWithCoinMap(bitgo, coins);
+
+      // registerToken should have been called for dynamic tokens
+      assert.ok(registerTokenSpy.callCount > 0);
+
+      // Each call should pass a valid coin from the coinMap
+      for (let i = 0; i < registerTokenSpy.callCount; i++) {
+        const call = registerTokenSpy.getCall(i);
+        const staticsCoin = call.args[0];
+        assert.ok(coins.has(staticsCoin.name), `${staticsCoin.name} should exist in the coin map`);
+      }
+    });
+
+    it('should not add tokens to the global coin map when coin map has no ERC20 tokens', function () {
+      const limitedCoinMap = coins.filter((coin) => !(coin instanceof Erc20Coin));
+
+      registerWithCoinMap(bitgo, limitedCoinMap);
+
+      // registerToken should not be called since no ERC20 tokens are in the map
+      assert.strictEqual(registerTokenSpy.callCount, 0);
+    });
+  });
+});