据介绍，预付手续费机制主要改善跨链应用中的费用可预测性。用户无需承担目标链侧额外扣费导致的实际到账金额减少；同时，CCTP Quote API 可统一计算不同支持链的费用，并将 Fast Transfer 和 Forwarding 手续费整合为单一报价，开发者无需自行搭建系统分别计算多项协议费用。此外，手续费可直接使用源链原生代币支付，不会减少或影响实际转移的 USDC 余额。
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