Solana 开发学习之通过RPC与Solana交互

Solana 开发学习之通过RPC与Solana交互

相干链接

• https://solana.com/docs/rpc/http
  
• https://www.jsonrpc.org/specification
  
• https://www.json.org/json-en.html
  

JSON-RPC 2.0 规范

JSON-RPC 是一种无状态、轻量级远程过程调用 (RPC) 协议。该规范重要界说了几种数据结构及其处理惩罚规则。它与传输无关，因为这些概念可以在同一进程中、通过套接字、通过 http 或在许多差别的消息转达情况中利用。它利用JSON ( RFC 4627 ) 作为数据格式。
接口RPC

节点相干接口

获取集群节点信息

通过getClusterNodes方法可以获得当前网络内，集群节点的相干信息，比如验证者的key，节点IP，节点版本等。

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc": "2.0", "id": 1,
4.         "method": "getClusterNodes"
5.     }
6.     '
7.    
8. {"jsonrpc":"2.0","result":[{"featureSet":3580551090,"gossip":"67.209.54.90:8001","pubkey":"7pbH563fFai2Gm8aXGi27Toj1i7x55rGp7QQ8ZQt6C7i","pubsub":null,"rpc":null,"shredVersion":503,"tpu":"67.209.54.90:8004","tpuQuic":"67.209.54.90:8010","version":"1.17.21"},{"featureSet":3580551090,"gossip":"37.27.61.250:8000","pubkey":"HPpYXZ944SXpJB3Tb7Zzy2K7YD45zGREsGqPtEP43xBx","pubsub":null,"rpc":null,"shredVersion":503,"tpu":"37.27.61.250:8003","tpuQuic":"37.27.61.250:8009","version":"1.17.22"},
10. ......
11. {"featureSet":3011420684,"gossip":"69.197.5.60:8001","pubkey":"FKizb2faoz57ym1bTWcZhei3aUZu7eU5AiY1EYoZsok6","pubsub":null,"rpc":null,"shredVersion":503,"tpu":null,"tpuQuic":null,"version":"1.17.5"}],"id":1}

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区块相干接口

获取当前区块高度

通过getBlockHeight可以获取当前的区块高度

• https://solana.com/docs/rpc/http/getblockheight
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc":"2.0","id":1,
4.         "method":"getBlockHeight"
5.     }
6.     '
7. {"jsonrpc":"2.0","result":268621259,"id":1}

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获取最近的Block Hash

• https://solana.com/docs/rpc/http/getlatestblockhash
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "id":1,
4.         "jsonrpc":"2.0",
5.         "method":"getLatestBlockhash",
6.         "params":[
7.         {
8.             "commitment":"processed"
9.         }
10.         ]
11.     }
12.     '
13. {"jsonrpc":"2.0","result":{"context":{"apiVersion":"1.17.21","slot":280325472},"value":{"blockhash":"9ebRPaCY2pcKAPhWzjDtmLArbSzAH1Mb5n8PZzXKbW8X","lastValidBlockHeight":268622097}},"id":1}

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获取指定高度block的信息

• https://solana.com/docs/rpc/http/getblock
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc": "2.0","id":1,
4.         "method":"getBlock",
5.         "params": [
6.             174302734,
7.             {
8.                 "encoding": "jsonParsed",
9.                 "maxSupportedTransactionVersion":0,
10.                 "transactionDetails":"full",
11.                 "rewards":false
12.             }
13.         ]
14.     }
15.     '

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获取指定block简直认状态

• https://solana.com/docs/rpc/http/getblockcommitment
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc": "2.0", "id": 1,
4.         "method": "getBlockCommitment",
5.         "params":[174302734]
6.     }
7.     '
8. {"jsonrpc":"2.0","result":{"commitment":null,"totalStake":158091345604635247},"id":1}

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一次性获取多个Block的信息

• https://solana.com/docs/rpc/http/getblocks
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc": "2.0", "id": 1,
4.         "method": "getBlocks",
5.         "params": [
6.             174302734, 174302735
7.         ]
8.     }
9.     '
10. {"jsonrpc":"2.0","result":[174302734,174302735],"id":1}

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分页获取Block

• https://solana.com/docs/rpc/http/getblockswithlimit
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.   {
3.     "jsonrpc": "2.0",
4.     "id":1,
5.     "method":"getBlocksWithLimit",
6.     "params":[174302734, 3]
7.   }
8. '
9. {"jsonrpc":"2.0","result":[174302734,174302735,174302736],"id":1}

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Slot和Epoch相干接口

获取当前Epoch信息

epoch在一样平常POS中比力常见，表示这个周期内，一些参与验证的节点信息是固定的，如果有新 节点或者节点权重变动，将在下一个epoch中见效。

• https://solana.com/docs/rpc/http/getepochinfo
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {"jsonrpc":"2.0","id":1, "method":"getEpochInfo"}
3.     '
4. {"jsonrpc":"2.0","result":{"absoluteSlot":280331471,"blockHeight":268627796,"epoch":648,"slotIndex":395471,"slotsInEpoch":432000,"transactionCount":13011134475},"id":1}

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获取Epoch的调度信息

• https://solana.com/docs/rpc/http/getepochschedule
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc":"2.0","id":1,
4.         "method":"getEpochSchedule"
5.     }
6.     '
7. {"jsonrpc":"2.0","result":{"firstNormalEpoch":0,"firstNormalSlot":0,"leaderScheduleSlotOffset":432000,"slotsPerEpoch":432000,"warmup":false},"id":1}

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获取最新Slot

• https://solana.com/docs/rpc/http/getslot
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.         {"jsonrpc":"2.0","id":1, "method":"getSlot"}
3.     '
4. {"jsonrpc":"2.0","result":280333661,"id":1}

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账号相干接口

获取Account信息

• https://solana.com/docs/rpc/http/getaccountinfo
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc": "2.0",
4.         "id": 1,
5.         "method": "getAccountInfo",
6.         "params": [
7.             "6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD",
8.             {
9.                 "encoding": "base58",
10.                 "commitment": "finalized"
11.             }
12.         ]
13.     }
14.     '
15. {"jsonrpc":"2.0","result":{"context":{"apiVersion":"1.17.21","slot":280334128},"value":{"data":["","base58"],"executable":false,"lamports":1984429840,"owner":"11111111111111111111111111111111","rentEpoch":18446744073709551615,"space":0}},"id":1}

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"executable"表示 是否为可执行合约
"lamports"表示余额，这里精度*10^9
所有普通账号的Owner都是系统根账号： "11111111111111111111111111111111"
获取账号余额

• https://solana.com/docs/rpc/http/getbalance
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.     {
3.         "jsonrpc": "2.0", "id": 1,
4.         "method": "getBalance",
5.         "params": [
6.             "6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD"
7.         ]
8.     }
9.     '
10. {"jsonrpc":"2.0","result":{"context":{"apiVersion":"1.17.21","slot":280334989},"value":1984429840},"id":1}

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获取某个合约管理的所有Account

• https://solana.com/docs/rpc/http/getprogramaccounts
  

1. curl  https://api.devnet.solana.com  -X POST -H "Content-Type: application/json" -d '
2.         {
3.             "jsonrpc": "2.0",
4.             "id": 1,
5.             "method": "getProgramAccounts",
6.             "params": [
7.             "namesLPneVptA9Z5rqUDD9tMTWEJwofgaYwp8cawRkX",
8.             {
9.                 "encoding": "jsonParsed",
10.                 "filters": [
11.                 {
12.                     "dataSize": 128
13.                 }
14.                 ]
15.             }
16.             ]
17.         }
18.     '

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SPL-Token相干接口

获取某个Token Account账号的余额

1. curl  https://api.devnet.solana.com  -X POST -H "Content-Type: application/json" -d '
2.         {
3.             "jsonrpc": "2.0", "id": 1,
4.             "method": "getTokenAccountBalance",
5.             "params": [
6.                 "HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh"
7.             ]
8.         }
9.     '
10. {"jsonrpc":"2.0","result":{"context":{"apiVersion":"1.17.21","slot":280346391},"value":{"amount":"90000000000","decimals":9,"uiAmount":90.0,"uiAmountString":"90"}},"id":1}

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生意业务相干接口

返回分类账中的当前生意业务计数

• https://solana.com/docs/rpc/http/gettransactioncount
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.   {"jsonrpc":"2.0","id":1, "method":"getTransactionCount"}
3. '
4. {"jsonrpc":"2.0","result":13011550533,"id":1}

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返回已确认生意业务的生意业务具体信息

• https://solana.com/docs/rpc/http/gettransaction
  

1. curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.   {
3.     "jsonrpc": "2.0",
4.     "id": 1,
5.     "method": "getTransaction",
6.     "params": [
7.       "4jbcoJYS6ZGPcUmHpqTnxeLHfQxvUqQQnzgoJCgWWA1LpKkKWRA5y2FZ7rDQ2v4NBBcuUJqh37A9p92mvbTmS6iY",
8.       "json"
9.     ]
10.   }
11. '
12. {"jsonrpc":"2.0","result":{"blockTime":1708498774,"meta":{"computeUnitsConsumed":26670,"err":null,"fee":5000,"innerInstructions":[{"index":0,"instructions":[{"accounts":[6],"data":"84eT","programIdIndex":4,"stackHeight":2},{"accounts":[0,2],"data":"11119os1e9qSs2u7TsThXqkBSRVFxhmYaFKFZ1waB2X7armDmvK3p5GmLdUxYdg3h7QSrL","programIdIndex":3,"stackHeight":2},{"accounts":[2],"data":"P","programIdIndex":4,"stackHeight":2},{"accounts":[2,6],"data":"6dE9a3kQ4bw3BRvx61TGMGrZBgsnwYEPx2MMEsN75K3Ui","programIdIndex":4,"stackHeight":2}]}],"loadedAddresses":{"readonly":[],"writable":[]},"logMessages":["Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL invoke [1]","Program log: CreateIdempotent","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]","Program log: Instruction: GetAccountDataSize","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1595 of 394517 compute units","Program return: TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA pQAAAAAAAAA=","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success","Program 11111111111111111111111111111111 invoke [2]","Program 11111111111111111111111111111111 success","Program log: Initialize the associated token account","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]","Program log: Instruction: InitializeImmutableOwner","Program log: Please upgrade to SPL Token 2022 for immutable owner support","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1405 of 387904 compute units","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]","Program log: Instruction: InitializeAccount3","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 4214 of 384020 compute units","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success","Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL consumed 20498 of 400000 compute units","Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL success","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [1]","Program log: Instruction: TransferChecked","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 6172 of 379502 compute units","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success"],"postBalances":[1984429840,2039280,2039280,1,934087680,731913600,1461600,10000000],"postTokenBalances":[{"accountIndex":1,"mint":"E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx","owner":"6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD","programId":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","uiTokenAmount":{"amount":"90000000000","decimals":9,"uiAmount":90.0,"uiAmountString":"90"}},{"accountIndex":2,"mint":"E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx","owner":"H6Su7YsGK5mMASrZvJ51nt7oBzD88V8FKSBPNnRG1u3k","programId":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","uiTokenAmount":{"amount":"10000000000","decimals":9,"uiAmount":10.0,"uiAmountString":"10"}}],"preBalances":[1986474120,2039280,0,1,934087680,731913600,1461600,10000000],"preTokenBalances":[{"accountIndex":1,"mint":"E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx","owner":"6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD","programId":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","uiTokenAmount":{"amount":"100000000000","decimals":9,"uiAmount":100.0,"uiAmountString":"100"}}],"rewards":[],"status":{"Ok":null}},"slot":280114248,"transaction":{"message":{"accountKeys":["6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD","HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh","HY1GfCQabyUMFRGpDu3eFoVW3ny8ifHKVZ8LbvzbDPsK","11111111111111111111111111111111","TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL","E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx","H6Su7YsGK5mMASrZvJ51nt7oBzD88V8FKSBPNnRG1u3k"],"header":{"numReadonlySignedAccounts":0,"numReadonlyUnsignedAccounts":5,"numRequiredSignatures":1},"instructions":[{"accounts":[0,2,7,6,3,4],"data":"2","programIdIndex":5,"stackHeight":null},{"accounts":[1,6,2,0],"data":"g7c6qhYoikLGp","programIdIndex":4,"stackHeight":null}],"recentBlockhash":"4Y34ks76nadvQXmcbFAX1XmkegHHsQMA1sM4cA3CqYL9"},"signatures":["4jbcoJYS6ZGPcUmHpqTnxeLHfQxvUqQQnzgoJCgWWA1LpKkKWRA5y2FZ7rDQ2v4NBBcuUJqh37A9p92mvbTmS6iY"]}},"id":1}

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推送RPC

• accountSubscribe : 订阅Account的变革，比如lamports
  
• logsSubscribe : 订阅生意业务的日志
  
• programSubscribe ： 订阅合约Account的变革
  
• signatureSubscribe : 订阅签名状态变革
  
• slotSubscribe : 订阅slot的变革
  

每个变乱，还有对应的Unsubscribe动作，取消订阅。将上面的Subscribe替换成Unsubscribe即可。
安装wscat

1. npm install -g ws wscat

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建立连接

1. wscat -c wss://api.devnet.solana.com

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• https://websocketking.com/
  
• https://solana.com/docs/rpc/websocket
  

订阅合约所属于Account变乱

1. {
2.         "jsonrpc": "2.0",
3.         "id": 1,
4.         "method": "programSubscribe",
5.         "params": [
6.             "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
7.             {
8.             "encoding": "jsonParsed"
9.             }
10.         ]
11.     }

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练习

通过curl和wscat命令行来模仿一个监视钱包动作
创建账号

• SOL账号： 6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD
  
• SPL-Token(Mint Account): E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx
  
• Token Account: HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh
  

实时展示余额变革（订阅SOL余额变革）

• https://solana.com/docs/rpc/websocket/accountsubscribe
  

获取1sol

1. solana airdrop 1
2. Requesting airdrop of 1 SOL
4. Signature: 4ZWQHwNYVWcs6THZ5A3C6ccHfovJi3HVgZ55LV8NAcZA95iLjyX9Ey6cUnGV7T4JnZnv97443kQ94pKkDG4x7K7Y
6. 2.98442984 SOL

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订阅Account变革

1. {
2.   "jsonrpc": "2.0",
3.   "id": 1,
4.   "method": "accountSubscribe",
5.   "params": [
6.     "6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD",
7.     {
8.       "encoding": "jsonParsed",
9.       "commitment": "finalized"
10.     }
11.   ]
12. }

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列出已知SPL-Token的余额

1. spl-token balance E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx
2. 90

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获取SPL-Token下有多少 Token Account:

1. curl  https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
2.         {
3.             "jsonrpc": "2.0",
4.             "id": 1,
5.             "method": "getTokenAccountsByOwner",
6.             "params": [
7.             "6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD",
8.             {
9.                 "mint": "E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx"
10.             },
11.             {
12.                 "encoding": "jsonParsed"
13.             }
14.             ]
15.         }
16.     '
17. {"jsonrpc":"2.0","result":{"context":{"apiVersion":"1.17.21","slot":280355742},"value":[{"account":{"data":{"parsed":{"info":{"isNative":false,"mint":"E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx","owner":"6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD","state":"initialized","tokenAmount":{"amount":"90000000000","decimals":9,"uiAmount":90.0,"uiAmountString":"90"}},"type":"account"},"program":"spl-token","space":165},"executable":false,"lamports":2039280,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":165},"pubkey":"HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh"}]},"id":1}

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实时展示SPL-Token余额变革

1. {
2.   "jsonrpc": "2.0",
3.   "id": 1,
4.   "method": "accountSubscribe",
5.   "params": [
6.     "HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh",
7.     {
8.       "encoding": "jsonParsed",
9.       "commitment": "finalized"
10.     }
11.   ]
12. }

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转账生意业务

1. spl-token transfer --fund-recipient E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx 1 H6Su7YsGK5mMASrZvJ51nt7oBzD88V8FKSBPNnRG1u3k
2. Transfer 1 tokens
3.   Sender: HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh
4.   Recipient: H6Su7YsGK5mMASrZvJ51nt7oBzD88V8FKSBPNnRG1u3k
5.   Recipient associated token account: HY1GfCQabyUMFRGpDu3eFoVW3ny8ifHKVZ8LbvzbDPsK
7. Signature: 4WeFPgn7VGbXVqgmtspeKYm38PE9NqxjFfXxZg9QAiy8f5Um7Q3n8hWgiGnzV3SBXdQ7SHGVF22X2pTxpQbwTwGU
10. spl-token transfer --fund-recipient E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx 1 H6Su7YsGK5mMASrZvJ51nt7oBzD88V8FKSBPNnRG1u3k
11. Transfer 1 tokens
12.   Sender: HDv1RgdHjrjSdnTFJsMqQGPcKTiuF7zLjhNaSd7ihbKh
13.   Recipient: H6Su7YsGK5mMASrZvJ51nt7oBzD88V8FKSBPNnRG1u3k
14.   Recipient associated token account: HY1GfCQabyUMFRGpDu3eFoVW3ny8ifHKVZ8LbvzbDPsK
16. Signature: 5gamUZFLAiXraD3DCQ9XEyaqodDX6iQuvLqapyeLokbdot4HAQEqUvBndXgr1uXa6owcR5YaG7BT5i5d6bEQUMwv

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注意：转账2次，第一次监听连接断开故没有监控到。
查询余额

1. spl-token balance E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx
2. 88

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websocket 监控收到

1. {
2.   "jsonrpc": "2.0",
3.   "method": "accountNotification",
4.   "params": {
5.     "result": {
6.       "context": {
7.         "slot": 280357854
8.       },
9.       "value": {
10.         "lamports": 2039280,
11.         "data": {
12.           "program": "spl-token",
13.           "parsed": {
14.             "info": {
15.               "isNative": false,
16.               "mint": "E7eHC3g4QsFXuaBe3X2wVr54yEvHK8K8fq6qrgB64djx",
17.               "owner": "6SWBzQWZndeaCKg3AzbY3zkvapCu9bHFZv12iiRoGvCD",
18.               "state": "initialized",
19.               "tokenAmount": {
20.                 "amount": "88000000000",
21.                 "decimals": 9,
22.                 "uiAmount": 88,
23.                 "uiAmountString": "88"
24.               }
25.             },
26.             "type": "account"
27.           },
28.           "space": 165
29.         },
30.         "owner": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
31.         "executable": false,
32.         "rentEpoch": 18446744073709552000,
33.         "space": 165
34.       }
35.     },
36.     "subscription": 601464
37.   }
38. }

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