Service Fee Policy
RainLink is committed to providing efficient and secure cross-chain bridge services. In order to support system operation, network relay, security audit and infrastructure maintenance, we charge a moderate service fee (Service Fee) for each cross-chain operation. This document details the composition, applicable rules and related instructions of the service fee.
What is the service fee?
The service fee is a fixed or proportional fee charged by RainLink to users in the process of completing cross-chain asset transfers, which is independent of the gas cost of the blockchain itself. The fee is used to:
- Pay for relay node operation and maintenance costs;
- Cover off-chain communication server resource consumption;
- Fund continuous security audits and system upgrades;
- Provide user support and transaction tracking services.
Difference between service fee and transaction fee
Users usually pay two parts when using RainLink:
Transaction Fee: Gas fee paid by users for on-chain transactions, such as transaction packaging fees on Ethereum.
Service Fee: Cross-chain service cost charged by RainLink, see below for specific standards.
Service Fee Billing Rules
RainLink’s service fee adopts a model of coexistence of proportional and minimum fees to ensure that the fees are fair and cover basic operating costs:
| Assets | Source Chain | Target Chain | Service Fee |
|---|---|---|---|
| USDT USDC BNB ETH TRX | BNB Smart Chain Ethereum Tron | Xone | Free |
| USDT USDC BNB ETH TRX | Xone | BNB Smart Chain Ethereum Tron | 0.03% |
Transparency of Fee Usage
We promise that the service fees collected by RainLink will be mainly used for the following purposes:
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Infrastructure stability maintenance: such as communicator servers and on-chain contract monitoring systems;
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Security upgrades and vulnerability fixes: Ensure the anti-attack capability of user assets during cross-chain processes.