# Fomo Cross-chain Fees Methodology

## 1. Overview

Fees are measured as the total economic value paid by users to execute cross-chain swaps through Fomo Cross-chain. These fees are accrued off-chain and are subsequently settled in USDC on Base by Relay solvers to the Fomo fee collector. The economic activity and revenue-generating capacity of the cross-chain swap product are evaluated using this metric. Financial performance of the cross-chain routing infrastructure is quantified through the tracking of these on-chain settlements.

## 2. Data sources

- **Blockchain events**: ERC-20 `Transfer` events on Base, specifically those representing USDC transfers from Relay solver accounts to the Fomo fee collector account, covering Base
- **External data**: End-of-day price feeds and asset metadata for USDC

## 3. Step-by-step calculation

### Component A: Settlement transfer extraction

- **Purpose**: The identification and extraction of fee settlement transactions from Relay solvers to the Fomo fee collector.
- **Logic**: ERC-20 `Transfer` events on Base are filtered to isolate transactions where the recipient is the designated Fomo fee collector account and the sender is an authorized Relay solver account. Only transfers of the USDC asset with a value greater than zero are included. These settlements are recognized on-chain on the day the settlement transaction is executed.
- **Key fields**: `block_timestamp` (timing), `from_address` (sender), `to_address` (recipient), `token_address` (asset identification), `amount` (raw fee value)

### Component B: Decimal normalization and USD conversion

- **Purpose**: The normalization of raw fee amounts and their conversion to USD.
- **Logic**: Raw fee amounts are normalized by the decimal precision of the USDC asset. The normalized values are then multiplied by the end-of-day USD price of USDC sourced from asset price feeds.
- **Key fields**: `amount` (normalized fee value), `price_usd` (asset price)

### Component C: Daily aggregation and zero-filling

- **Purpose**: The aggregation of fees to a daily granularity and the preservation of continuous time-series data.
- **Logic**: Normalized USD fee values are aggregated by day based on the block timestamp. A zero-filling strategy is applied to ensure that days with no settlement activity are populated with a fee value of zero, maintaining a continuous daily time series for the Fomo Cross-chain product.
- **Key fields**: `timestamp` (daily interval), `fees` (aggregated daily USD value)

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

Total value users pay to use a protocol (gross fees, user-paid fees).

Fees

DEX aggregators

Fomo earns a fee on every trade placed through the app. On perpetuals it acts as a Hyperliquid builder: each order placed from the app carries Fomo's builder code, and Hyperliquid routes a 0.05% builder fee per side to Fomo's builder address at trade time, on top of the venue's own fee and any HIP-3 deployer share. On spot swaps Fomo charges a platform fee collected in its own fee wallets; on cross-chain swaps routed through Relay, Relay collects Fomo's app fee and settles it as USDC to Fomo's fee collector on Base.

Fomo offers perpetual contracts on crypto, US equities, pre-IPO companies, indices and commodities through Hyperliquid's native markets and HIP-3 markets such as trade.xyz, alongside spot trading of memecoins and other tokens. The app is available on iOS, Android and the web at fomo.family.

Fomo is a mobile-first social trading app built by FOMO Labs, Inc., founded in 2025 by former dYdX employees. It combines a social feed, leaderboards and copy trading with self-custodial, gasless token swaps on Solana, Robinhood Chain, Base, BNB Chain and Monad, and since June 2026 perpetual futures executed on Hyperliquid. Fomo is operated as a private company; no token has been issued.

Fomo Cross-chain

Fees

Fees

Chain breakdown