A 1% protocol rate applies to every bonding-curve buy and sell on BNB Chain, Robinhood, X Layer and Monad (2.5% on Morph). Tax tokens pay an additional protocol rate of up to 0.3% of trade volume, on top of the creator's 1%, 3%, 5% or 10% tax.

Flap is a token launchpad on Robinhood Chain, BNB Chain, X Layer, Monad and Morph.

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# Flap Supply-side fees Methodology

## 1. Overview

The Supply-side fees metric is defined as the share of transaction fees that is distributed to service providers and ecosystem participants, specifically asset creators and asset holders. These fees are accumulated during tax dispatches and are denominated in the quote asset of the respective tax asset. The metric is utilized to evaluate the economic incentives and value distribution within the Flap ecosystem.

## 2. Data sources

- **Blockchain events**: `TokenQuoteSet` events from `Portal` contracts and `FlapTaxProcessorDispatchExecuted` events from `TaxProcessor` contracts, covering BNB Chain, X Layer, and Robinhood Chain
- **External data**: End-of-day price feeds and asset metadata

## 3. Step-by-step calculation

### Component A: Quote asset mapping

- **Purpose**: The quote asset associated with each tax asset is identified.
- **Logic**: `TokenQuoteSet` events from `Portal` contracts are parsed to map each tax asset to its designated quote asset. The most recent quote asset configuration is selected for each tax asset. If no quote asset is specified or if the quote asset is set to the zero address, the wrapped native asset of the respective chain is applied as the fallback asset address.
- **Key fields**: `token` and `quoteToken`

### Component B: Supply-side fee extraction

- **Purpose**: Raw supply-side fee amounts are extracted from tax dispatch events.
- **Logic**: `FlapTaxProcessorDispatchExecuted` events from `TaxProcessor` contracts are parsed to capture tax dispatches. The supply-side fee amount is calculated by summing the market amount and the dividend amount. These raw amounts are then mapped to their corresponding quote asset or wrapped native fallback asset.
- **Key fields**: `taxToken`, `marketAmount`, and `dividendAmount`

### Component C: Decimal normalization and USD conversion

- **Purpose**: Raw fee amounts are normalized and converted to USD.
- **Logic**: Raw supply-side fee amounts are aggregated by day, chain, and quote asset address. These aggregated amounts are normalized by the decimal precision of the quote asset using asset metadata. The normalized amounts are then multiplied by end-of-day price feeds to determine the final supply-side fee value in USD.
- **Key fields**: `timestamp`, `chain_id`, `token_address`, and `fees_supply_side`

*This methodology was automatically generated by Token Terminal's methodology analyzer.*

Portion of fees distributed to service providers or supply-side participants.

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Supply-side fees

Supply-side fees

Competitive landscape

Chain breakdown