fix(swamp): simplify and correct FillBlocks and increase amount of pr…

…eallocated accounts

FillBlocks was generating much more blocks than expected. Calling of testnode.FillBlock once with block amount of accounts fixes it.
Also, the amoung of preallocated accounts was increased, to ensure enough blocks can be generated

nodebuilder/tests/swamp/swamp.go

@@ -67,7 +67,7 @@ func NewSwamp(t *testing.T, options ...Option) *Swamp {
 	ctx := context.Background()
 
 	// we create an arbitray number of funded accounts
-	accounts := make([]string, 10)
+	accounts := make([]string, 100)
 	for i := 0; i < 10; i++ {
 		accounts = append(accounts, tmrand.Str(9))
 	}

nodebuilder/tests/swamp/swamp_tx.go

@@ -8,6 +8,7 @@ import (
 	"github.com/tendermint/tendermint/pkg/consts"
 
 	"github.com/celestiaorg/celestia-app/testutil/testnode"
+
 	"github.com/celestiaorg/celestia-app/x/payment"
 	paytypes "github.com/celestiaorg/celestia-app/x/payment/types"
 )
@@ -26,19 +27,11 @@ func (s *Swamp) SubmitData(ctx context.Context, data []byte) error {
 	return nil
 }
 
-func (s *Swamp) FillBlocks(ctx context.Context, bsize, blocks int) error {
+func (s *Swamp) FillBlocks(_ context.Context, bsize, blocks int) error {
 	btime := s.comps.CoreCfg.Consensus.CreateEmptyBlocksInterval
 	timer := time.NewTimer(btime)
 	defer timer.Stop()
-	for i := 0; i < blocks; i++ {
-		_, err := testnode.FillBlock(s.ClientContext, bsize, s.accounts)
-		if err != nil {
-			return err
-		}
-		err = testnode.WaitForNextBlock(s.ClientContext)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
+
+	_, err := testnode.FillBlock(s.ClientContext, bsize, s.accounts[:blocks+1])
+	return err
 }