fix(sdk-core): exempt FLRP import from TSS recipient guard on PascalCase buildParams

signTransactionTss passes buildParams.type as 'Import' while WP stores
intentType as 'import', so the WCN-151 recipient guard still threw after
adding lowercase import to NO_RECIPIENT_TX_TYPES. Also check intentType
when resolving the exemption.

Co-authored-by: Cursor <cursoragent@cursor.com>

TICKET: CECHO-1425

Author: ArunBala-Bitgo

modules/sdk-core/src/bitgo/utils/tss/recipientUtils.ts

@@ -117,7 +117,16 @@ export function resolveEffectiveTxParams(
   // Use its presence as a generic staking signal — no need to enumerate every intentType.
   const isStakingIntent = !!(txRequest.intent as PopulatedIntent)?.stakingRequestId;
 
-  if (!effectiveTxParams.recipients?.length && !isStakingIntent && !NO_RECIPIENT_TX_TYPES.has(txType)) {
+  // buildParams.type from the wallet UI is PascalCase ('Import'); intent.intentType from WP
+  // is lowercase ('import'). Either may be the source of truth depending on the signing path.
+  const intentType = (txRequest.intent as PopulatedIntent)?.intentType ?? '';
+
+  if (
+    !effectiveTxParams.recipients?.length &&
+    !isStakingIntent &&
+    !NO_RECIPIENT_TX_TYPES.has(txType) &&
+    !NO_RECIPIENT_TX_TYPES.has(intentType)
+  ) {
     throw new InvalidTransactionError(
       'Recipient details are required to verify this transaction before signing. Pass txParams with at least one recipient.'
     );

modules/sdk-core/test/unit/bitgo/utils/tss/recipientUtils.ts

@@ -126,6 +126,13 @@ describe('recipientUtils', function () {
       }
     });
 
+    it('does not throw when buildParams.type is PascalCase but intent.intentType is lowercase', function () {
+      // signTransactionTss passes txPrebuild.buildParams as txParams. Prebuild uses
+      // type: 'Import' while WP stores intentType: 'import' on the txRequest.
+      const txRequest = makeTxRequest({ intent: { intentType: 'import', recipients: [] } as any });
+      assert.doesNotThrow(() => resolveEffectiveTxParams(txRequest, { type: 'Import', recipients: [] }));
+    });
+
     it('throws InvalidTransactionError for unknown types with no recipients', function () {
       const txRequest = makeTxRequest();
       assert.throws(