feat(sdk-core): update prebuildSelfManagedStakingTransaction to bui…

…ld once

`build` calls `prebuildTransaction` internally, for ETH like smc wallets
we only need the expanded params for staking transactions

SC-498

TICKET: SC-498

modules/sdk-core/src/bitgo/staking/stakingWallet.ts

@@ -18,7 +18,7 @@ import {
   ClaimRewardsOptions,
 } from './iStakingWallet';
 import { BitGoBase } from '../bitgoBase';
-import { IWallet, PrebuildTransactionResult } from '../wallet';
+import { IWallet, PrebuildTransactionOptions, PrebuildTransactionResult } from '../wallet';
 import { ITssUtils, RequestTracer, TssUtils } from '../utils';
 
 export class StakingWallet implements IStakingWallet {
@@ -221,8 +221,12 @@ export class StakingWallet implements IStakingWallet {
    * @param transaction
    */
   async prebuildSelfManagedStakingTransaction(transaction: StakingTransaction): Promise<PrebuildTransactionResult> {
-    const builtStakingTransaction = await this.build(transaction);
-    const buildParams = builtStakingTransaction.transaction.buildParams;
+    let buildParams: PrebuildTransactionOptions | undefined;
+    if ((this.wallet.baseCoin.supportsTss() && this.wallet.baseCoin.getFamily() !== 'eth') || this.isEthTss) {
+      buildParams = (await this.build(transaction)).transaction.buildParams;
+    } else {
+      buildParams = (await this.expandBuildParams(transaction)).buildParams;
+    }
     const formattedParams = {
       ...buildParams,
       coin: this.coin,