Merge pull request #7470 from BitGo/derek/SC-3812-support-message-signing-for-bsc-and-polygon

feat(statics): support message signing for bsc and polygon

Author: derekchen745

modules/account-lib/src/index.ts

@@ -337,6 +337,8 @@ const coinMessageBuilderFactoryMap = {
   topeth: Eth.MessageBuilderFactory,
   baseeth: Eth.MessageBuilderFactory,
   tbaseeth: Eth.MessageBuilderFactory,
+  polygon: Eth.MessageBuilderFactory,
+  tpolygon: Eth.MessageBuilderFactory,
 };
 
 coins

modules/sdk-coin-bsc/src/bsc.ts

@@ -35,6 +35,11 @@ export class Bsc extends AbstractEthLikeNewCoins {
     return true;
   }
 
+  /** @inheritDoc */
+  supportsSigningTypedData(): boolean {
+    return true;
+  }
+
   /** inherited doc */
   getDefaultMultisigType(): MultisigType {
     return multisigTypes.tss;

modules/statics/src/coinFeatures.ts

@@ -225,6 +225,7 @@ export const POLYGON_FEATURES = [
   CoinFeature.MPCV2,
   CoinFeature.STUCK_TRANSACTION_MANAGEMENT_TSS,
   CoinFeature.BULK_TRANSACTION,
+  CoinFeature.SHARED_EVM_MESSAGE_SIGNING,
   CoinFeature.ERC20_BULK_TRANSACTION,
 ];