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# Fathom Tradeable assets Methodology

## 1. Overview

The tradeable assets metric measures the cumulative number of unique tokens that have ever been available for trading on Fathom DEX. This metric tracks ecosystem growth by counting how many distinct assets users can trade on the platform. The calculation identifies when each token first becomes tradeable (through liquidity pool creation) and maintains a running cumulative count over time.

## 2. Data sources

The calculation uses the following raw data sources:
- **Blockchain events**: Parsed `PairCreated` events from the Fathom DEX Factory contract on XDC Network, which are emitted when new trading pairs are created
- **Token metadata**: Token information including symbol and decimal precision from multiple blockchain networks to properly identify and name trading pairs
- **External data**: End-of-day price feeds for potential USD conversion (applied through standardization macros)

## 3. Step-by-step calculation

### Component A: Trading pair extraction
- **Purpose**: Identifies all trading pairs created on Fathom DEX by parsing Factory contract events
- **Logic**: Extracts `PairCreated` events from the Fathom DEX v2 Factory contract on XDC Network. Each event contains the addresses of two tokens (`token0` and `token1`) that form a new trading pair, along with the pair contract address (`pair`). The component also captures the block timestamp when each pair was created and assigns a fee tier of 0.3% (3000 basis points divided by 1,000,000) to all pairs, as Fathom DEX uses a uniform fee structure.
- **Key fields**: `token0_address`, `token1_address`, `account_address` (pair contract), `block_timestamp`, `fee_tier` (0.003), `chain` (xdc), `version` (v2)

### Component B: Asset identification and first appearance tracking
- **Purpose**: Converts trading pairs into individual tradeable assets and tracks when each asset first becomes available
- **Logic**: Takes each trading pair and splits it into two separate records - one for each token in the pair. Uses UNION ALL to combine token0 and token1 addresses as distinct tradeable assets. Groups by token address and chain to find the minimum timestamp when each unique token first appeared in any trading pair. Truncates timestamps to daily boundaries to establish when assets first became tradeable on a per-day basis.
- **Key fields**: `token_address`, `timestamp` (daily), `product_id` (Fathom DEX), `chain`

### Component C: Daily asset count aggregation
- **Purpose**: Counts how many new unique assets became tradeable each day
- **Logic**: Groups the first appearances by day, product, and chain to count distinct new token addresses that became tradeable on each specific date. Applies zero-filling to ensure every day has a record, even when no new assets were added, which is necessary for accurate cumulative calculations.
- **Key fields**: `asset_count` (daily new assets), `timestamp` (daily), `product_id`, `chain`

### Final aggregation
- **Combining components**: The daily asset counts are processed through a window function to calculate cumulative sums
- **Currency conversion**: No direct currency conversion is applied as this metric counts assets rather than monetary values, though the standardization macro may apply formatting conventions
- **Time aggregation**: Data is aggregated to daily boundaries using timestamp truncation, with zero-filling ensuring no gaps in the time series
- **Final calculation**: Uses a window function with `sum(asset_count) over (partition by chain, product_id order by timestamp)` to calculate the running cumulative total of unique tradeable assets. Each day's value represents the total number of distinct tokens that have ever been available for trading on Fathom DEX up to that date.

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

Number of unique tokens tradeable on the exchange.

Fathom

Tradeable assets

Tradeable assets

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