From 501d50b68eb6538e4049e3178195b3286cda861f Mon Sep 17 00:00:00 2001
From: agent <agent@bitgo.com>
Date: Tue, 23 Jun 2026 21:29:35 +0000
Subject: [PATCH] fix(statics): route Polygon ERC-20 send-many via ERC-20
 batcher

Adds CoinFeature.ERC20_BULK_TRANSACTION to POLYGON_TOKEN_FEATURES,
POLYGON_TOKEN_FEATURES_EXCLUDE_SINGAPORE, and
POLYGON_TOKEN_FEATURES_WITH_FRANKFURT. Mirrors what is already wired
up for BSC and the polygon coin-level features.

Without this flag, send-many requests for Polygon ERC-20 tokens
(e.g. polygon:usdt) on mainnet fell through to the native batcher
path, which encoded the call as sendMultiSigToken(batchContract,
totalAmount) instead of batchTransferFrom([recipients], [amounts]).
The total token amount was transferred to the batch contract as a
single recipient, leaving funds stuck at the batcher contract and
forcing customers to fall back to one transfer per recipient.

Adds a coverage test asserting every polygon: / tpolygon: token
exposes ERC20_BULK_TRANSACTION.

Ticket: COINS-435
Session-Id: af73ff16-aaf1-4203-9eeb-2abe86d9474e
Task-Id: 2cb7c5db-bf77-49d6-9356-e06df65e43fc
---
 modules/statics/src/coinFeatures.ts |  8 +++++++-
 modules/statics/test/unit/coins.ts  | 10 ++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/modules/statics/src/coinFeatures.ts b/modules/statics/src/coinFeatures.ts
index b5c9fe0e84..b09ac434e8 100644
--- a/modules/statics/src/coinFeatures.ts
+++ b/modules/statics/src/coinFeatures.ts
@@ -167,6 +167,7 @@ export const POLYGON_TOKEN_FEATURES_WITH_FRANKFURT = [
   ...ACCOUNT_COIN_DEFAULT_FEATURES,
   CoinFeature.CUSTODY_BITGO_FRANKFURT,
   CoinFeature.BULK_TRANSACTION,
+  CoinFeature.ERC20_BULK_TRANSACTION,
 ];
 export const CSPR_FEATURES = [
   ...ACCOUNT_COIN_DEFAULT_FEATURES,
@@ -262,10 +263,15 @@ export const POLYGON_FEATURES = [
   CoinFeature.ERC20_BULK_TRANSACTION,
 ];
 
-export const POLYGON_TOKEN_FEATURES = [...ACCOUNT_COIN_DEFAULT_FEATURES, CoinFeature.BULK_TRANSACTION];
+export const POLYGON_TOKEN_FEATURES = [
+  ...ACCOUNT_COIN_DEFAULT_FEATURES,
+  CoinFeature.BULK_TRANSACTION,
+  CoinFeature.ERC20_BULK_TRANSACTION,
+];
 export const POLYGON_TOKEN_FEATURES_EXCLUDE_SINGAPORE = [
   ...ACCOUNT_COIN_DEFAULT_FEATURES_EXCLUDE_SINGAPORE,
   CoinFeature.BULK_TRANSACTION,
+  CoinFeature.ERC20_BULK_TRANSACTION,
 ];
 export const EVM_ERC20_TOKEN_FEATURES_EXCLUDE_SINGAPORE = [
   ...ACCOUNT_COIN_DEFAULT_FEATURES_EXCLUDE_SINGAPORE,
diff --git a/modules/statics/test/unit/coins.ts b/modules/statics/test/unit/coins.ts
index 644323c0a0..02ec4797bf 100644
--- a/modules/statics/test/unit/coins.ts
+++ b/modules/statics/test/unit/coins.ts
@@ -1232,6 +1232,16 @@ describe('ERC20 Bulk Transaction Feature', () => {
       coin.features.includes(CoinFeature.ERC20_BULK_TRANSACTION).should.eql(true);
     });
   });
+
+  it('Polygon ERC-20 tokens should have ERC20_BULK_TRANSACTION feature', () => {
+    coins.forEach((coin) => {
+      if (coin.name.startsWith('polygon:') || coin.name.startsWith('tpolygon:')) {
+        coin.features
+          .includes(CoinFeature.ERC20_BULK_TRANSACTION)
+          .should.eql(true, `expected ${coin.name} to include ERC20_BULK_TRANSACTION`);
+      }
+    });
+  });
 });
 
 describe('Custody Bulk Withdrawal Features', () => {