DBC Fee Scheduler

The DBC fee scheduler controls how the base fee changes after a pool opens. It can be used in three product ways:

Scheduler Style	Product Behavior	Best Fit
Fixed	Fee stays constant.	Simple launches with predictable fee messaging.
Linear	Fee decreases by the same amount each period.	Launches that want a clear anti-sniper schedule.
Exponential	Fee decreases by a percentage of the current fee each period.	Launches that want stronger early protection and faster early relief.

How Scheduler Settings Work

A scheduler uses four core settings.

Setting	Product Meaning
Cliff fee	The starting fee when trading opens.
Number of periods	How many fee reductions can happen.
Period frequency	How long each period lasts.
Reduction factor	How much the fee decreases each period.

The schedule is measured from the pool’s activation point. Activation can be based on slot or timestamp, depending on the config.

Fixed-Fee Behavior

Fixed-fee behavior is the simplest scheduler setup.

\text{Fee} = \text{Cliff Fee}

In product terms, every trade pays the same base fee unless dynamic fees are enabled. This is useful for launchpads that want broad, easy-to-explain presets.

Fixed fee is not a separate on-chain scheduler curve. It is scheduler behavior where period_frequency, number_of_period, and reduction_factor are all zero, so the program returns the cliff fee for every swap.

Linear Scheduling

Linear scheduling reduces the fee by the same amount each period.

\text{Fee} = \text{Cliff Fee} - (\text{Passed Periods} \times \text{Reduction Factor})

Think of it like a staircase.

High fee
   |
   |____
        |____
             |____
                  |____ Final fee

Linear scheduling is easy to publish because every step is predictable.

Exponential Scheduling

Exponential scheduling reduces the fee by a percentage-style factor each period.

\text{Fee} = \text{Cliff Fee} \times (1 - \text{Reduction Factor})^\text{Passed Periods}

This usually drops faster early, then tapers.

High fee
   |\
   | \
   |  \__
   |     \____ Final fee

Exponential scheduling is useful when the launch wants the strongest protection near opening, but does not want to keep fees elevated for too long.

Fee Bounds

Scheduler fees must stay within DBC bonding phase fee bounds.

Bound	Product Meaning
Minimum base fee	0.25% minimum base fee for bonding phase configurations.
Maximum total fee	99% maximum fee cap to avoid invalid launch configurations.

If any scheduler field is non-zero, all three schedule fields must be non-zero. Mixed zero and non-zero scheduler settings are invalid.

Choosing a Scheduler

I want the simplest possible fee

Use fixed-fee behavior. It is easiest for traders to understand and works well when anti-sniper fee decay is not needed.

I want a public fee countdown

Use linear scheduling. It is the easiest decaying-fee model to communicate because each reduction is the same size.

I want high protection only at the beginning

Use exponential scheduling. It front-loads fee protection while making the launch more accessible as early trading settles.

User Guides

Core Products

Helper Products

Legacy Products

How Scheduler Settings Work

Fixed-Fee Behavior

Linear Scheduling

Exponential Scheduling

Fee Bounds

Choosing a Scheduler

​How Scheduler Settings Work

​Fixed-Fee Behavior

​Linear Scheduling

​Exponential Scheduling

​Fee Bounds

​Choosing a Scheduler

How Scheduler Settings Work

Fixed-Fee Behavior

Linear Scheduling

Exponential Scheduling

Fee Bounds

Choosing a Scheduler