solana.js: fix lease fund logic

javascript/solana.js/src/accounts/queueAccount.ts

@@ -506,8 +506,8 @@ export class QueueAccount extends Account<types.OracleQueueAccountData> {
     const leaseInit = (
       await LeaseAccount.createInstructions(this.program, payer, {
         loadAmount: params.fundAmount,
-        funderTokenAccount: params.funderTokenAccount,
-        funderAuthority: params.funderAuthority,
+        funderTokenAccount: params.funderTokenAccount ?? userTokenAddress,
+        funderAuthority: params.funderAuthority ?? undefined,
         aggregatorAccount: aggregatorAccount,
         queueAccount: this,
         jobAuthorities: [], // create lease before adding jobs to skip this step
@@ -646,7 +646,9 @@ export class QueueAccount extends Account<types.OracleQueueAccountData> {
       params
     );
 
-    const signatures = await this.program.signAndSendAll(txns);
+    const signatures = await this.program.signAndSendAll(txns, {
+      skipPreflight: true,
+    });
 
     return [aggregatorAccount, signatures];
   }

javascript/solana.js/src/transaction.ts

@@ -243,10 +243,15 @@ export class TransactionObject implements ITransactionObject {
   ): Transaction {
     const txn = this.toTxn(blockhash);
     const allSigners = [...this.signers];
+
     if (signers) {
       allSigners.push(...signers);
     }
+
+    if (allSigners.length) {
       txn.sign(...allSigners);
+    }
+
     return txn;
   }