add solana_rent_epoch

pymongo · Jul 18, 2024 · 267403f · 267403f
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diff --git a/2024/07/solana_deploy_invoke_program.md b/2024/07/solana_deploy_invoke_program.md
@@ -40,6 +40,8 @@ Program Id                                   | Slot      | Authority
 6jL67XKqEVWPBZEmMT8AuhTP4zJefpPs48BmV3JLxncR | 312032887 | 6YA5ZxLRNuYEg44xbkLPtgbu5dBQdEftcWS31kpyba4f | 0.1350588 SOL
 ```
 
+注意 program 的私钥在 target/deploy/greeting_account-keypair.json 换开发电脑的时候记得备份 program 私钥
+
 ## ts/rs调用合约
 
 代码参考 <https://github.com/pymongo/solana_client_example/blob/master/examples/invoke_program.rs>
@@ -52,12 +54,25 @@ Program Id                                   | Slot      | Authority
 - APT/SUI 智能合约用 move 的 bcs 格式序列化
 - borsh/bcs都是固定长编码，跟bincode2,protobuf小整数用变长编码不一样
 
+其实solana源码还是挺多地方用了 bincode 的
+
 ## 合约销毁退租金
 
 同一个合约项目种重复deploy的话不会创建新的program_id
 
 > solana program close
 
+```
+Program Id                                   | Slot      | Authority                                    | Balance
+8xubajzX923ZXpUzbyTcXuxy9QcMbrUCosm4H6ZRtTtk | 312304419 | EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H | 0.33901464 SOL
+GmCUexGFRgPmqYzGjvRwaP5YKLzEE1dGj7NSCcxzfZ3E | 312453867 | EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H | 0.52615512 SOL
+DsdkMKakvJrRgZCGq3zmywyAUfG9mw1qfvPM1f7BLZh9 | 312455182 | EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H | 0.1350588 SOL
+
+root@lb1:~/solana_client_example# solana program close DsdkMKakvJrRgZCGq3zmywyAUfG9mw1qfvPM1f7BLZh9 --bypass-warning
+
+Closed Program Id DsdkMKakvJrRgZCGq3zmywyAUfG9mw1qfvPM1f7BLZh9, 0.1350588 SOL reclaimed
+```
+
 ## token acount租金
 
 USDC转账的时候，如果接收方没有开通过USDC账户，则发送方需要支付创建USDC账户的租金，如下图

diff --git a/2024/07/solana_rent_epoch.md b/2024/07/solana_rent_epoch.md
@@ -0,0 +1,69 @@
+# [SOL 数据租金](/2024/07/solana_rent_epoch.md)
+
+储蓄卡/信用卡的每年不消费的话要交年费，例如储值1500就免除今年的年费。
+信用卡的年费机制让我联想到 solana 的 rent-exempt 机制
+SOL 作为一个"分布式数据库"，存储数据是要交「租金」的，代码要算出数据的长度交租
+租金不是立即扣除，而是锁定在账户上，过段时间扣除，不补充租金的话数据就被冻结
+
+银行免除储值较高储户的年费，激励储户充钱防止挤兑提高存款准备金的一个手段
+solana 对持有 SOL 的用户奖励一定的租金豁免额度，可以免除每年数据租金，奖励持有者的机制
+当然 staking 的奖励也能抵扣租金和交易费用
+数据租金很好的给分布式数据库减负，但就76kb的代码收我80$租金太贵了
+
+(让我联想到TRON能量质押奖励点数可以抵扣GAS费用)
+
+我理解错了，最低租金豁免门槛指的是"锁定"一定数量的金钱，可以永久存储数据，rent_epoch 字段会设置成 u64::MAX
+
+如果存储数据资金被挪走部分，会像期货/永续合约那样定时从维持保证金中收取利息/资金费/租金，维持保证金太低就爆仓/数据冻结
+
+SOL 文档说基于啥的存储硬件成本越来越低，租金会随摩尔定律或硬件
+
+https://solana.com/docs/terminology#rent-exempt
+
+> Accounts that maintain a minimum lamport balance that is proportional to the amount of data stored on the account. All newly created accounts are stored on-chain permanently until the account is closed. It is not possible to create an account that falls below the rent exemption threshold.
+
+示例代码上都是直接转最小豁免租金的钱
+
+```
+Program Id                                   | Slot      | Authority                                    | Balance
+8xubajzX923ZXpUzbyTcXuxy9QcMbrUCosm4H6ZRtTtk | 312304419 | EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H | 0.33901464 SOL
+GXScYf8mQbRUPYzjgthe3idqqvfqPoYKbBe3vHmdT3dS | 312479425 | EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H | 0.5365116 SOL
+
+w@w:~$ p solana epoch-info
+ProxyChains-3.1 (http://proxychains.sf.net)
+
+Block height: 300746209
+Slot: 312513815
+Epoch: 723
+Transaction Count: 14077900097
+Epoch Slot Range: [312336000..312768000)
+Epoch Completed Percent: 41.161%
+Epoch Completed Slots: 177815/432000 (254185 remaining)
+Epoch Completed Time: 18h 34m 17s/1day 21h 2m 56s (1day 2h 28m 39s remaining)
+
+root@lb1:~/solana_client_example# solana account 8xubajzX923ZXpUzbyTcXuxy9QcMbrUCosm4H6ZRtTtk
+
+Public Key: 8xubajzX923ZXpUzbyTcXuxy9QcMbrUCosm4H6ZRtTtk
+Balance: 0.00114144 SOL
+Owner: BPFLoaderUpgradeab1e11111111111111111111111
+Executable: true
+Rent Epoch: 18446744073709551615
+
+root@lb1:~# solana transfer EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H 0.1 --config greeting_account-keypair.json  --allow-unfunded-recipient
+Error: Account EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H has insufficient funds for spend (0.1 SOL) + fee (0.000005 SOL)
+root@lb1:~# solana balance --config greeting_account-keypair.json
+0 SOL
+```
+
+尝试转走合约账户上面的钱
+
+```
+root@lb1:~# solana-keygen pubkey greeting_account-keypair.json
+8xubajzX923ZXpUzbyTcXuxy9QcMbrUCosm4H6ZRtTtk
+root@lb1:~# solana balance --keypair greeting_account-keypair.json
+0.00114144 SOL
+root@lb1:~# solana transfer -k greeting_account-keypair.json EsQczJECiL2QXYofUT9Cs9c6BuujdEYcmRnhuhUbFr4H 0.0003
+Error: RPC response error -32002: Transaction simulation failed: This account may not be used to pay transaction fees
+```
+
+好吧合约账户不能转账，就当solana上面交钱存储数据是永久的好了
diff --git a/README.md b/README.md
@@ -1,6 +1,7 @@
 - [文章列表 - 吴翱翔的博客](/)
 - [正在读的书](/books.md)
 - **2024-07**
+    - [SOL 数据租金](/2024/07/solana_rent_epoch.md)
     - [SOL合约部署调用](/2024/07/solana_deploy_invoke_program.md)
     - [solana-keygen](/2024/07/solana_keygen.md)
     - [aptos #[view]](/2024/07/aptos_view_functions.md)