[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"article-layer-2-blockchain-scalability-explained-zh":3,"tags-layer-2-blockchain-scalability-explained-zh":35,"related-lang-layer-2-blockchain-scalability-explained-zh":50,"related-posts-layer-2-blockchain-scalability-explained-zh":54,"series-blockchain-e635f045-c22c-4842-82ad-70c6c54f68b4":91},{"id":4,"title":5,"content":6,"summary":7,"source":8,"source_url":9,"author":10,"image_url":11,"keywords":12,"language":23,"translated_content":10,"views":24,"is_premium":25,"created_at":26,"updated_at":26,"cover_image":11,"published_at":27,"rewrite_status":28,"rewrite_error":10,"rewritten_from_id":29,"slug":30,"category":31,"related_article_id":32,"status":33,"google_indexed_at":34,"x_posted_at":10,"tweet_text":10,"title_rewritten_at":10,"title_original":10,"key_takeaways":10,"topic_cluster_id":10,"embedding":10,"is_canonical_seed":25},"e635f045-c22c-4842-82ad-70c6c54f68b4","Layer 2 為何成為區塊鏈標配","\u003Cp>說真的，Lay\u003Ca href=\"\u002Fnews\u002Fmeerkat-safety-violations-agent-traces-zh\">er\u003C\u002Fa> 2 不是配角了。現在它處理的交易量，已經比 E\u003Ca href=\"\u002Fnews\u002Fanthropic-mythos-preview-cybersecurity-zh\">th\u003C\u002Fa>ereum 主網多很多。手續費也常常少掉 90% 以上，這就是大家開始把它當標配的原因。\u003C\u002Fp>\u003Cp>如果你只記一件事，就是這句。Layer 1 負責結算和安全，Layer 2 負責跑日常交易。講白了，主網像法院，L2 像快速處理櫃台。\u003C\u002Fp>\u003Cp>這篇我會直接拆開講。你會看到它怎麼運作、為什麼需要它、有哪些坑，還有它跟其他鏈的差別。\u003C\u002Fp>\u003Ch2>Layer 2 到底在做什麼\u003C\u002Fh2>\u003Cp>\u003Ca href=\"https:\u002F\u002Fethereum.org\u002Fen\u002Fdevelopers\u002Fdocs\u002Fscaling\u002Flayer-2-rollups\u002F\" target=\"_blank\" rel=\"noopener\">Ethereum\u003C\u002Fa> 對 Layer 2 的定義很清楚。它是延伸主鏈的獨立網路。重點是，它要繼承主鏈安全性。\u003C\u002Fp>\n\u003Cfigure class=\"my-6\">\u003Cimg src=\"https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1776168595026-wvca.png\" alt=\"Layer 2 為何成為區塊鏈標配\" class=\"rounded-xl w-full\" loading=\"lazy\" \u002F>\u003C\u002Ffigure>\n\u003Cp>這裡的「繼承」很重要。真正的 L2 不是另一條完全獨立的鏈。它還是要靠 Layer 1 做最終結算、爭議處理、資料可用性。\u003C\u002Fp>\u003Cp>實作上也不難懂。使用者先把交易送到 L2。L2 的 sequencer 先排序，再把很多筆交易打包。最後再把摘要或證明送回主網。\u003C\u002Fp>\u003Cp>主網不會把每筆交易重跑一遍。它只驗證必要資訊。這樣做的好處很直接：快很多，也便宜很多。\u003C\u002Fp>\u003Cul>\u003Cli>Ethereum 主網吞吐量：約 15 到 30 TPS\u003C\u002Fli>\u003Cli>典型 L2 吞吐量：約 1,000 到 4,000 TPS\u003C\u002Fli>\u003Cli>L2 手續費：常見約 0.01 到 0.08 美元\u003C\u002Fli>\u003Cli>主網手續費：Q1 2025 約 3.78 美元\u003C\u002Fli>\u003Cli>Ethereum 驗證者數量：約 100 萬\u003C\u002Fli>\u003C\u002Ful>\u003Cp>你可能會想問，這樣會不會犧牲安全？答案是：看設計。只要最後還是回到主網結算，安全假設就還在。\u003C\u002Fp>\u003Cp>但如果某個系統只是「看起來像 L2」，那就要小心了。沒有主網結算，沒有可驗證證明，那它可能只是另一條比較快的鏈。\u003C\u002Fp>\u003Ch2>為什麼 Ethereum 需要第二層\u003C\u002Fh2>\u003Cp>這題要回到 \u003Ca href=\"https:\u002F\u002Fvitalik.eth.limo\u002F\" target=\"_blank\" rel=\"noopener\">Vitalik Buterin\u003C\u002Fa> 講過的 scalability trilemma。概念很直白。去中心化、安全性、擴充性，三個很難同時拉滿。\u003C\u002Fp>\u003Cp>Ethereum 一開始選的是前兩個。這讓主網很穩，也很難被亂搞。可是代價就是，交易一多，費用就會飆。\u003C\u002Fp>\u003Cp>在尖峰時段，主網一筆交易收 50 到 100 美元，真的不稀奇。拿來結算大額資產可以。拿來買咖啡、玩遊戲、做小額 swap，就很荒謬。\u003C\u002Fp>\u003Cp>所以 L2 不是裝飾品。它是主網撐不住日常流量時的現實解法。\u003C\u002Fp>\u003Cblockquote>“The scaling trilemma is not a theorem.” — Vitalik Buterin\u003C\u002Fblockquote>\u003Cp>這句話很有意思。意思不是說問題消失了，而是說工程上已經找到可行路線。Ethereum 不再硬把所有工作塞進 Layer 1。\u003C\u002Fp>\u003Cp>現在的做法更像分工。主網當結算層，L2 當執行層。這比什麼都塞在一起，務實很多。\u003C\u002Fp>\u003Ch2>數字最誠實，L2 省多少\u003C\u002Fh2>\u003Cp>Layer 2 會紅，因為數字真的漂亮。Rollup 會把很多筆交易壓縮後再送回主網。這樣主網只要驗證結果，不用重算全部內容。\u003C\u002Fp>\n\u003Cfigure class=\"my-6\">\u003Cimg src=\"https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1776168595173-kkpv.png\" alt=\"Layer 2 為何成為區塊鏈標配\" class=\"rounded-xl w-full\" loading=\"lazy\" \u002F>\u003C\u002Ffigure>\n\u003Cp>2024 年 3 月的 \u003Ca href=\"https:\u002F\u002Fethereum.org\u002Fen\u002Froadmap\u002Fdencun\u002F\" target=\"_blank\" rel=\"noopener\">Dencun upgrade\u003C\u002Fa> 之後，L2 開始大量用 blob transaction。Blob 是暫時性的資料區塊，容量約 128 KB，會在大約 18 天後被清掉。\u003C\u002Fp>\u003Cp>這個改動很關鍵。它讓 L2 的資料成本下降大約 10 倍到 100 倍。Base 在升級後，交易量還一度成長 224%。\u003C\u002Fp>\u003Cp>費用差距也很明顯。Arbitrum 的費用下降 92%。Q1 2025，L2 平均交易費約 0.08 美元，主網則約 3.78 美元。\u003C\u002Fp>\u003Cul>\u003Cli>Dencun 後，L2 資料成本下降約 10 倍到 100 倍\u003C\u002Fli>\u003Cli>Base 交易量升級後增加 224%\u003C\u002Fli>\u003Cli>Arbitrum 費用下降 92%\u003C\u002Fli>\u003Cli>L1 合約部署：約 847 美元\u003C\u002Fli>\u003Cli>L2 合約部署：約 42 美元\u003C\u002Fli>\u003C\u002Ful>\u003Cp>這對開發者很有感。以前部署一個合約，像在燒錢測試。現在在 L2 上試錯，成本低很多。\u003C\u002Fp>\u003Cp>對一般使用者也一樣。你不會每次轉帳都在心痛。這才是區塊鏈要走向日常使用的前提。\u003C\u002Fp>\u003Ch2>Rollup、ZK、Optimistic 差在哪\u003C\u002Fh2>\u003Cp>\u003Ca href=\"https:\u002F\u002Farbitrum.io\u002F\" target=\"_blank\" rel=\"noopener\">Arbitrum\u003C\u002Fa>、\u003Ca href=\"https:\u002F\u002Fwww.optimism.io\u002F\" target=\"_blank\" rel=\"noopener\">OP Mainnet\u003C\u002Fa>、\u003Ca href=\"https:\u002F\u002Fbase.org\u002F\" target=\"_blank\" rel=\"noopener\">Base\u003C\u002Fa>、\u003Ca href=\"https:\u002F\u002Fzksync.io\u002F\" target=\"_blank\" rel=\"noopener\">zkSync Era\u003C\u002Fa>、\u003Ca href=\"https:\u002F\u002Fwww.starknet.io\u002F\" target=\"_blank\" rel=\"noopener\">StarkNet\u003C\u002Fa> 都算在 L2 大傘下，但做法差很多。\u003C\u002Fp>\u003Cp>\u003Ca href=\"\u002Fnews\u002Fopenai-codex-limits-pro-membership-update-zh\">Op\u003C\u002Fa>timistic rollup 的邏輯是先相信批次正確。只有有人提出挑戰，系統才會回頭驗證。這種設計比較簡單，也比較成熟。\u003C\u002Fp>\u003Cp>ZK rollup 則是直接丟證明。它用零知識證明確認狀態正確。這種做法通常更快，也更適合想要快速提領的人。\u003C\u002Fp>\u003Cp>但兩者都有代價。Optimistic rollup 常有約 7 天的 fraud-proof window。ZK rollup 則要處理證明生成的複雜度，工程門檻高很多。\u003C\u002Fp>\u003Cul>\u003Cli>\u003Ca href=\"https:\u002F\u002Fl2beat.com\u002F\" target=\"_blank\" rel=\"noopener\">L2Beat\u003C\u002Fa> 追蹤各 rollup 的安全等級與 TVL\u003C\u002Fli>\u003Cli>Arbitrum One 鎖倉價值約 180 億美元\u003C\u002Fli>\u003Cli>Base 約占 L2 DeFi TVL 的 46.6%\u003C\u002Fli>\u003Cli>OP Stack 已支撐 34 條 OP chain\u003C\u002Fli>\u003Cli>StarkEx 累積處理超過 1 兆美元交易量\u003C\u002Fli>\u003C\u002Ful>\u003Cp>我覺得最麻煩的不是技術，而是碎片化。鏈越多，資產越分散。使用者要跨橋，風險就跟著上來。\u003C\u002Fp>\u003Cp>橋接協議一直是攻擊熱點。這點很現實。很多專案講得很漂亮，最後還是卡在橋和流動性。\u003C\u002Fp>\u003Ch2>產業脈絡：L2 為什麼會變主流\u003C\u002Fh2>\u003Cp>如果你看整個產業，就會發現一件事。大家早就不想只靠單一主網撐全部流量。這不是 Ethereum 獨有的問題，幾乎每條公鏈都碰過。\u003C\u002Fp>\u003Cp>差別在於 Ethereum 比較早承認現實。它沒有硬撐「主網全包」。它把結算和執行拆開，讓 L2 接手大部分互動。\u003C\u002Fp>\u003Cp>這也解釋了為什麼很多新應用直接選 L2。遊戲、社群、支付、DeFi 小額互動，這些場景都怕高費用。L2 讓它們有機會活下來。\u003C\u002Fp>\u003Cp>但別把 L2 想得太完美。中心化 sequencer、跨鏈流動性、橋安全，這些問題都還在。只是現在大家比較願意先接受能用的版本。\u003C\u002Fp>\u003Cp>如果你要找一個類比，我會說 L2 很像雲端時代的容器平台。底層還在，但真正跑服務的地方，已經換了位置。\u003C\u002Fp>\u003Cp>這也是為什麼開發者要看懂它。你不是只在選網路。你是在選成本模型、風險模型，還有使用者體驗。\u003C\u002Fp>\u003Ch2>接下來該怎麼看\u003C\u002Fh2>\u003Cp>我自己的判斷很直接。接下來 12 到 24 個月，L2 會繼續吃掉更多 Ethereum 活動量。只要手續費差距還在，使用者就會往便宜那邊跑。\u003C\u002Fp>\u003Cp>真正要觀察的，是 sequencer 會不會更分散，橋會不會更安全，還有流動性能不能更順。這三件事沒做好，L2 還是會被嫌麻煩。\u003C\u002Fp>\u003Cp>如果你是開發者，現在就該把 L2 當預設部署目標。你會省下測試成本，也比較容易抓到一般使用者。\u003C\u002Fp>\u003Cp>如果你是使用者，下次轉帳前先問自己一句：我真的需要主網結算嗎？還是我只需要便宜、快、最後仍回到 Ethereum 的路？\u003C\u002Fp>\u003Cp>講白了，這題已經不是要不要用 L2。比較像是，你要選哪一條 L2，還有你願意承擔多少橋接風險。\u003C\u002Fp>","Layer 2 已經處理遠多於 Ethereum 主網的交易量，費用可降 90% 以上。這篇用白話拆解 rollup、ZK 與 Optimistic 的差異。","yellow.com","https:\u002F\u002Fyellow.com\u002Flearn\u002Flayer-2-blockchain-explained",null,"https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1776168595026-wvca.png",[13,14,15,16,17,18,19,20,21,22],"Layer 2","Ethereum","rollup","ZK rollup","Optimistic rollup","區塊鏈擴容","Dencun","Arbitrum","Base","OP Stack","zh",1,false,"2026-04-14T12:09:38.290578+00:00","2026-04-14T12:09:38.114+00:00","done","2eafeb9a-c355-4681-ab14-a4e4edbe6f62","layer-2-blockchain-scalability-explained-zh","blockchain","c0770ee0-250c-4a72-a949-969842aa5b4e","published","2026-04-15T09:00:09.696+00:00",[36,38,40,42,43,45,46,48],{"name":20,"slug":37},"arbitrum",{"name":13,"slug":39},"layer-2",{"name":22,"slug":41},"op-stack",{"name":18,"slug":18},{"name":14,"slug":44},"ethereum",{"name":15,"slug":15},{"name":21,"slug":47},"base",{"name":16,"slug":49},"zk-rollup",{"id":32,"slug":51,"title":52,"language":53},"layer-2-blockchain-scalability-explained-en","Layer 2 Explained: Why Blockchains Need It","en",[55,61,67,73,79,85],{"id":56,"slug":57,"title":58,"cover_image":59,"image_url":59,"created_at":60,"category":31},"8c37fa14-a081-4810-b5b8-2a2a184a7d1d","web3-communication-trust-infrastructure-2026-zh","Web3 溝通正在變成信任基礎設施","https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1778797251989-it0w.png","2026-05-14T22:20:32.600359+00:00",{"id":62,"slug":63,"title":64,"cover_image":65,"image_url":65,"created_at":66,"category":31},"9059e494-8f72-4c34-a888-2424c682da10","why-bases-x402-protocol-matters-more-than-100m-zh","為什麼 Base 的 x402 協議比 1 億美元里程碑更重要","https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1778719260627-a0va.png","2026-05-14T00:40:19.962138+00:00",{"id":68,"slug":69,"title":70,"cover_image":71,"image_url":71,"created_at":72,"category":31},"74969a5b-7ec5-4686-80ee-fa39a5cc43d4","gala-games-web3-gaming-2026-zh","Gala Games 在 Web3 遊戲找回存在感","https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1778689265110-p0y5.png","2026-05-13T16:20:41.782583+00:00",{"id":74,"slug":75,"title":76,"cover_image":77,"image_url":77,"created_at":78,"category":31},"d330d44a-4eff-4ba6-aa72-5ef246e31c64","why-lace-20-matters-more-than-cardanos-next-hard-fork-zh","為什麼 Lace 2.0 比 Cardano 下一次硬分叉更重要","https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1778681462051-f600.png","2026-05-13T14:10:25.488549+00:00",{"id":80,"slug":81,"title":82,"cover_image":83,"image_url":83,"created_at":84,"category":31},"0af0a4b2-b0a1-4a52-8fe9-1328bde87c8e","why-ethereum-treasury-buying-is-a-bad-bet-zh","為什麼 Ethereum Treasury Buying 正在變成一筆差勁的長…","https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1778386236909-ytls.png","2026-05-10T04:10:21.784208+00:00",{"id":86,"slug":87,"title":88,"cover_image":89,"image_url":89,"created_at":90,"category":31},"ab3ef302-99ee-40b3-b2d0-4b67a9049ec4","yakovenko-warns-ai-could-crack-pqc-wallets-zh","Yakovenko 警告：AI 可能破解 PQC 錢包","https:\u002F\u002Fxxdpdyhzhpamafnrdkyq.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Fcovers\u002Finline-1778170266863-wnnh.png","2026-05-07T16:10:41.097774+00:00",[92,97,102,107,112,117,122,127,132,137],{"id":93,"slug":94,"title":95,"created_at":96},"e1b4b518-f86b-410c-8c82-8cfb787ff2ef","moonpay-open-wallet-standard-ai-payments-zh","MoonPay 推 OWS，瞄準 AI 付款","2026-03-28T03:08:33.379969+00:00",{"id":98,"slug":99,"title":100,"created_at":101},"e72bae29-ddbd-437b-aaa4-cd662605394b","next-gen-crypto-simulators-ai-web3-training-zh","新一代加密模擬器更聰明了","2026-04-01T09:36:33.917023+00:00",{"id":103,"slug":104,"title":105,"created_at":106},"b8e39b58-6b9d-4714-92d3-26df18a3e0f4","rtk-cuts-claude-code-token-spend-zh","RTK 讓 Claude Code 少燒 Token","2026-04-01T10:24:29.259497+00:00",{"id":108,"slug":109,"title":110,"created_at":111},"7ff10146-4ca0-4670-a02c-384dde04f610","trm-labs-ai-agents-crypto-investigations-zh","TRM Labs 將 AI agent 帶進加密調查","2026-04-01T10:33:30.166266+00:00",{"id":113,"slug":114,"title":115,"created_at":116},"00668dea-9f0e-4019-b861-03817d5a8877","how-web3-marketing-changed-in-2026-zh","2026 Web3 行銷怎麼變了","2026-04-02T01:36:34.973322+00:00",{"id":118,"slug":119,"title":120,"created_at":121},"e7992274-42ee-40bc-bb05-97250098c56c","ai-agentic-defi-web3-grants-march-2026-zh","AI、Agentic DeFi 與 Web3 補助案","2026-04-02T05:51:36.857954+00:00",{"id":123,"slug":124,"title":125,"created_at":126},"5cef810b-af3d-467a-8b41-627769eca895","why-crypto-is-fixated-on-ai-agents-zh","為何加密圈盯上 AI Agent","2026-04-02T05:54:28.919864+00:00",{"id":128,"slug":129,"title":130,"created_at":131},"d30e6203-d522-41a1-b529-fcf4499cd985","web3-explained-what-it-is-why-it-matters-zh","Web3 是什麼，為何重要","2026-04-02T06:15:32.580114+00:00",{"id":133,"slug":134,"title":135,"created_at":136},"f29e65ae-64df-463b-ba22-afd9dcbd0f8f","trust-wallet-agent-kit-ai-trade-25-chains-zh","Trust Wallet 讓 AI 幫你交易","2026-04-02T06:27:33.183404+00:00",{"id":138,"slug":139,"title":140,"created_at":141},"91022b4c-b53e-4c18-abfe-914a8eca6e28","blockchain-in-ai-real-use-cases-zh","區塊鏈加 AI，真實落地在哪裡","2026-04-02T06:30:44.026286+00:00"]