Allbridge Core allows users to send stablecoins from one chain to another almost immediately by using native liquidity pools deployed across 5 EVM and non-EVM blockchains. Liquidity providers receive the majority of transfer fees paid by users (supply-side fees).

Allbridge Core is a cross-chain stablecoin bridge. Allbridge Core was co-founded by Yuriy Savchenko and Andriy Velykyy, and was launched in September 2022.

The Allbridge team own and govern the protocol. They currently take a cut of the transfer fees paid by the users (revenue). Allbridge Core’s investors include Race Capital and others.

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Allbridge Core

# Allbridge Core Supply-side fees Methodology

## 1. Overview

Supply-side fees for Allbridge represent the revenue generated for liquidity providers and validators from cross-chain bridge transfers. The metric is calculated by applying time-based fee percentages to daily transfer volumes across all supported chains. Allbridge updated its fee structure on January 30, 2023, increasing rates from 0.08% to 0.24% of transfer volume.

## 2. Data sources

The calculation uses several key data sources:
- **Blockchain event logs**: Parsed Allbridge smart contract events from Ethereum, BSC, and Polygon networks, specifically `Bridge_TokensSent_event`, `Bridge2_TokensSent_event`, and `Bridge2_TokensReceived_event`
- **Cross-chain transfer data**: Inferred transfer data from Tron and Solana networks captured through received transfer events on destination chains
- **External pricing data**: End-of-day token price feeds for stablecoins (USDC, BUSD) used in transfer volume USD conversion
- **Token metadata**: Token decimal information for proper amount normalization across different blockchain standards
- **Chain mapping data**: Internal Allbridge chain ID mappings to standard blockchain network names

## 3. Step-by-step calculation

### Component A: Bridge transfer extraction
- **Purpose**: Capture all cross-chain transfers facilitated by Allbridge protocol
- **Logic**: Parse `TokensSent` events from Allbridge smart contracts on Ethereum, BSC, and Polygon to extract outbound transfers. Each event contains the destination chain ID, token address, transfer amount, and transaction metadata. For chains without direct event access (Tron, Solana), infer transfer data from corresponding `TokensReceived` events on destination chains, using the embedded origin chain ID in the message data to avoid double-counting
- **Key fields**: `block_timestamp` for timing, `transaction_hash` for uniqueness, `destinationChainId` and origin chain ID for routing, `receiveToken` address for token identification, `amount` for transfer size

### Component B: Transfer data normalization
- **Purpose**: Standardize transfer amounts and token addresses across different blockchain networks
- **Logic**: Convert transfer amounts from contract-specific 3-decimal format to proper token decimals by dividing by 1000. Map token addresses for cross-chain consistency, using Ethereum USDC address (`0xa0b86a991c6218b36c1d19d4a2e9eb0ce3606eb48`) for Tron and Solana transfers to ensure accurate pricing. Apply chain-specific token mappings (BUSD for BSC, USDC for Ethereum and Polygon) based on destination chain
- **Key fields**: Normalized `transfer_amount` values, standardized `token_address` mappings, `origin_chain` and `destination_chain` identifiers

### Component C: Daily volume aggregation
- **Purpose**: Calculate daily transfer volumes in USD for each blockchain network
- **Logic**: Group normalized transfers by day, chain, and token address, then sum transfer amounts. Convert stablecoin amounts to USD using end-of-day price feeds, applying proper decimal corrections based on token metadata. Aggregate transfers at the daily level with chain-specific grouping to prepare for fee calculation
- **Key fields**: Daily `timestamp`, `chain_id` for network identification, aggregated `transfer_volume` in USD

### Component D: Fee percentage application
- **Purpose**: Calculate supply-side fees based on time-dependent fee rates
- **Logic**: Apply conditional fee percentages to daily transfer volumes based on the calculation date. For transfers before January 30, 2023, multiply volume by 0.08% (0.0008). For transfers on or after January 30, 2023, multiply volume by 0.24% (0.0024). This reflects Allbridge's fee structure update that increased rates to better compensate liquidity providers
- **Key fields**: Date-conditional `fees_supply_side` calculated as volume multiplied by applicable percentage rate

### Final aggregation
- **Combining components**: Daily transfer volumes from all supported chains are processed through the fee calculation logic, maintaining chain-level granularity for the final metric
- **Currency conversion**: All fee calculations are performed on USD-denominated transfer volumes, with stablecoin pricing applied during the volume aggregation phase
- **Time aggregation**: Fees are calculated and reported at daily granularity, with proper handling of time zone boundaries and gap filling
- **Final calculation**: Supply-side fees equal daily transfer volume multiplied by 0.08% (before January 30, 2023) or 0.24% (after January 30, 2023), representing the portion of transfer fees allocated to liquidity providers and protocol validators

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

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

Allbridge Core

Supply-side fees

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