# Constant Product xRex supply Methodology

## 1. Overview

xRex supply measures the total number of xRex tokens in existence within the Constant Product ecosystem. This metric reflects the circulating quantity of the xRex asset by accounting for all issuance and redemption activity. Tracking the total supply is essential for understanding the scale of the Constant Product liquidity pool on supported networks.

## 2. Data sources

- **Blockchain events**: ERC-20 `Transfer` events for the xRex asset, covering Linea
- **External data**: Asset metadata for decimal normalization

## 3. Step-by-step calculation

### Component A: Mint and burn event identification

- **Purpose**: Identify transaction logs that result in the creation or destruction of xRex tokens
- **Logic**: ERC-20 `Transfer` events are parsed from the xRex token contract on Linea. Issuance activity is identified by filtering for `Transfer` events where the sender is the null address. Redemption activity is identified by filtering for `Transfer` events where the recipient is the null address.
- **Key fields**: `amount`, `from_address`, `to_address`, `block_timestamp`

### Component B: Daily net change calculation

- **Purpose**: Aggregate all supply-modifying activities into daily net deltas
- **Logic**: Minted quantities are assigned positive values and burned quantities are assigned negative values. These amounts are aggregated by day to calculate the net change in xRex supply for each UTC day boundary.
- **Key fields**: `amount`, `block_timestamp`

### Component C: Cumulative supply and normalization

- **Purpose**: Calculate the total outstanding supply over time and adjust for decimal precision
- **Logic**: A running total of the daily net changes is calculated to determine the cumulative outstanding supply. For days without mint or burn activity, the previous day's supply value is carried forward. Final supply values are normalized by the decimal precision defined in the asset metadata.
- **Key fields**: `outstanding_supply`, `timestamp`

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

xRex supply

Constant Product

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xRex supply

xRex supply