cool_sim.go

tx, tx2, tx3 := new(types.Transaction), new(types.Transaction), new(types.Transaction)
// Send and abort both transactions
backend.SendTransaction(ctx, tx)
backend.SendTransaction(ctx, tx2)
backend.Rollback()

// Commits transaction to the chain
backend.SendTransaction(ctx, tx3)
backend.Commit()

// Use adjust time to test time-dependent functions
backend.AdjustTime(24 * time.Hour)
// Adjust time can only be called on an empty block and you need to call commit afterwards
backend.Commit()