# 付款流程

注意: `l2Txnhash` (「L2-hash」) 應該始終用作交易的唯一識別碼。這是 [AkashicChain](/traditional-chinese/jian-jie/shu-yu.md#akashicchain) 上任何交易的唯一交易 identifier。它存在於已確認的存款和待定/已確認的付款中。這對於[第二層](/traditional-chinese/jian-jie/shu-yu.md#di-er-ceng-layer2)交易尤其重要，因為第二層交易沒有第一層哈希值 (`txHash`)。

## <mark style="color:blue;">存款流程</mark>

{% @mermaid/diagram content="sequenceDiagram
autonumber
伺服器->>Akashic: getDepositAddress<br/> 使用唯一的用戶端識別碼 (identifier) 擷取用戶端的永久 L1 地址<br/>。
Akashic-->>伺服器: 永久 L1 地址
伺服器->>用戶: 永久 L1 地址
loop
用戶->>L1/L2 網路: 存款至地址
Akashic->>伺服器: 待存款回調<br/>包含識別碼 (identifier) 和 哈希值 (txHash)
Akashic->>伺服器: 確認存款回調<br/>包含識別碼 (identifier) 和 L2 哈希值 (TxnHash/txHash)
note over 伺服器: \*建議<br/>增加客戶結餘
end" fullWidth="false" %}

## <mark style="color:blue;">出款 (提幣) 流程</mark>

{% @mermaid/diagram content="sequenceDiagram
autonumber
伺服器->>Akashic: 以獨特的客戶識別碼 (identifier) 出款
Akashic-->>伺服器: 成功
note over 伺服器: \*建議<br/>扣除客戶結餘
Akashic->>L1/L2 網路: 出款
Akashic->>伺服器: 待出款回調<br/>包含識別碼 (identifier) 和 哈希值 (txHash)
Akashic->>伺服器: 確認出款回調<br/>包含識別碼 (identifier) 和 L2 哈有值 (TxnHash/txHash)" %}


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