Solana Foundation 宣布「Kora」推出，主打費用代付與遠端簽名，並搭配 Solana Keychain 的標準化設定與工具鏈，讓開發團隊用更一致的方式管理交易手續費、代幣政策與簽名環境。
（前情提要：一文速覽 Solana Breakpoint 2025 黑客松 33 個獲獎項目 ）
（背景補充：Solana基金會主席Lily Liu勸架喊停！Jupiter、Kamino的50億美元借貸市場內戰 ）
Solana 基金會幾個小時前正式推出「Kora」，目標是讓生態系中的交易可支援費用代付或以自選代幣支付手續費，並支援將簽名工作外包至安全環境。
貼文指出，Kora 的推出是因為先前缺乏「現代、標準化」的費用贊助與遠端簽名解法，雖然 Solana 帳戶模型本身提供可行性，但市場上沒有現成工具，因而由基金會開發提供。
Introducing Kora, a fee relayer and signing node for the @Solana ecosystem, enabling fee-free transactions, custom fee tokens, and more https://t.co/7wlmeYrbT6 pic.twitter.com/zloRLZ7oD9
— Solana Foundation (@SolanaFndn) December 22, 2025
核心功能：費用代付、任意代幣支付與遠端簽名
Kora 解鎖的功能包含三大面向：
第一，「完全贊助手續費」，也就是由指定的費用錢包代為支付交易成本
第二，「以任意代幣支付手續費」，包含可使用穩定幣作為支付媒介
第三，「遠端簽名」，將簽名流程移交到安全環境，例如 Turnkey 或企業常見的 AWS KMS。
Solana Foundation 提到，Kora 支援 6 種遠端簽名方案，且提供監控資金餘額與度量指標的機制，當費用錢包資金不足時能及時提醒，減少交易失敗風險。
費用管理與使用者體驗
整體來說，Kora 的費用代付機制可支援「應用層面」的使用者體驗優化：例如由服務方代付手續費，讓終端使用者在特定情境下「免付費」完成交易；或以穩定幣支付手續費，降低因基礎代幣價格波動造成的成本不確定性。
另一方面，遠端簽名可讓企業在既有的安全基礎設施中，管理金鑰與簽名流程。搭配資金餘額監控與度量指標，有利於營運團隊掌握費用金流狀態與風險。
Kora 的發布補足了生態中「缺乏標準工具」的空缺，後續可持續觀察各應用在費用代付與簽名管理的整合情形與成效。
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