EOS开发(十二)使用RPC API抵押/赎回CPU和NET资源

2023年1月30日 224次阅读来源: yuyangray

1. 前言

本文继续对EOS资源进行一个大概的讲解，并通过实例演示如何通过RPC API，操作CPU和NET资源的抵押/赎回。

我们依然在测试网络http://jungle.cryptolions.io:18888上，使用Postman对API进行测试。

2. CPU和NET

CPU和NET资源是通过抵押EOS Token获得的，可以由其他账户为你抵押，也可以自己抵押。如果是由他人为你抵押，他可以选择抵押的资源是否可以由你赎回，所获得的EOS也归于你；或者这部分资源只能由他赎回，所获得的EOS也归于他，简单来说就是资源是他送给你的还是只是租借给你的。当然，自己抵押的资源，赎回时会将EOS打回给自己的账户。

和内存一样，抵押和赎回也是通过eosio.token的transfer方法，与系统账户eosio.stake相互转账。系统不会收取手续费。

赎回资源时，EOS不会马上到账，而是会在三天后到账。你无法赎回已经使用的资源，需要在该资源自动释放后才可赎回。

CPU和NET资源是系统自动释放的，也就是已使用的这部分资源会在一段时间后恢复并可以再次使用。

3. 目标

这篇文章将演示三种情况：

A以租借的形式为B抵押资源，A可以赎回，B无法赎回
A以赠送的方式为B抵押资源，A无法赎回，B可以赎回
B自己抵押资源并且可以赎回

4. 准备工作

我们重新创建一个账户testnetstake。创建时只为其购买一些内存，不抵押CPU和NET资源。

生成一个新的钱包stake.wallet：

yuyangdeMacBook-Pro:cleos yuyang$ cleos wallet create -n stake --to-console
Creating wallet: stake
Save password to use in the future to unlock this wallet.
Without password imported keys will not be retrievable.
"PW5Kxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

生成两个公钥：

EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up

创建账户，注意抵押的CPU和NET资源的EOS都为0：

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" system newaccount --stake-net '0 EOS' --stake-cpu '0 EOS' --buy-ram '100 EOS' testnetyy111 testnetstake EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up

executed transaction: 9338daa79f6e41dfaf46b3ef147c63335e1df7314fb47a5cc7e4a97a7512be23  264 bytes  6678 us
#         eosio <= eosio::newaccount            {"creator":"testnetyy111","name":"testnetstake","owner":{"threshold":1,"keys":[{"key":"EOS7RKPFD8228...
#         eosio <= eosio::buyram                {"payer":"testnetyy111","receiver":"testnetstake","quant":"100.0000 EOS"}
#   eosio.token <= eosio.token::transfer        {"from":"testnetyy111","to":"eosio.ram","quantity":"99.5000 EOS","memo":"buy ram"}
#  testnetyy111 <= eosio.token::transfer        {"from":"testnetyy111","to":"eosio.ram","quantity":"99.5000 EOS","memo":"buy ram"}
#     eosio.ram <= eosio.token::transfer        {"from":"testnetyy111","to":"eosio.ram","quantity":"99.5000 EOS","memo":"buy ram"}
#   eosio.token <= eosio.token::transfer        {"from":"testnetyy111","to":"eosio.ramfee","quantity":"0.5000 EOS","memo":"ram fee"}
#  testnetyy111 <= eosio.token::transfer        {"from":"testnetyy111","to":"eosio.ramfee","quantity":"0.5000 EOS","memo":"ram fee"}
#  eosio.ramfee <= eosio.token::transfer        {"from":"testnetyy111","to":"eosio.ramfee","quantity":"0.5000 EOS","memo":"ram fee"}

查看账号情况，确认CPU和NET资源都为0：

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetstake
permissions: 
     owner     1:    1 EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
        active     1:    1 EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up
memory: 
     quota:     1.552 MiB    used:     2.926 KiB  

net bandwidth: 
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:                 0 bytes
     available:            0 bytes
     limit:                0 bytes

cpu bandwidth:
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:                 0 us   
     available:            0 us   
     limit:                0 us

5. A以租借的形式为B抵押资源

5.1 生成抵押的bin字符串

调用eosio合约的delegatebw方法
传入抵押者账户名称和接收者账户名称
指定要抵押的资源的类型和对应数量，单位为EOS。如果只想抵押其中一种资源，只需将另一项资源的值设为0
transfer为0，表示是以delegated租借的方式抵押资源

api
http://jungle.cryptolions.io:18888/v1/chain/abi_json_to_bin

params
{
    "code": "eosio",
    "action": "delegatebw",
    "args": {
        "from": "testnetyy111",
        "receiver": "testnetstake",
        "stake_net_quantity": "100.0000 EOS",
        "stake_cpu_quantity": "100.0000 EOS",
        "transfer": 0,
    }
}

return
{
    "binargs": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f530000000000"
}

5.2 获取当前最新的区块号

api
http://jungle.cryptolions.io:18888/v1/chain/get_info

params
无

return
{
    "server_version": "08819aae",
    "chain_id": "038f4b0fc8ff18a4f0842a8f0564611f6e96e8535901dd45e43ac8691a1c4dca",
    "head_block_num": 14157128,
    "last_irreversible_block_num": 14156794,
    "last_irreversible_block_id": "00d803faf226087020c201b3b18f6aea1d1e0ec654f926af6f4eca46683ec8a8",
    "head_block_id": "00d805487415a2d5c5f7f03ae719eac64274c23abcc524dbefdc6ef60531e206",
    "head_block_time": "2018-09-13T07:55:16.500",
    "head_block_producer": "owlinthedark",
    "virtual_block_cpu_limit": 200000000,
    "virtual_block_net_limit": 1048576000,
    "block_cpu_limit": 199900,
    "block_net_limit": 1048576,
    "server_version_string": "v1.2.5-dirty"
}

获取到区块号"head_block_num": 14157128

5.3 获取当前区块详情

api
http://jungle.cryptolions.io:18888/v1/chain/get_block

params
{"block_num_or_id":"14157128"}

return
{
    "timestamp": "2018-09-13T07:55:16.500",
    "producer": "owlinthedark",
    "confirmed": 0,
    "previous": "00d805471896a4b1f0214118d7d03395b2f350805e3352d0661eca313f1252f7",
    "transaction_mroot": "0000000000000000000000000000000000000000000000000000000000000000",
    "action_mroot": "2274d5cbc0ab5d00912ecc035f0157af143b2a27f7c48583c5382b518f6890fb",
    "schedule_version": 222,
    "new_producers": null,
    "header_extensions": [],
    "producer_signature": "SIG_K1_K1c4VLrKocDfjR1EQJzzriZHdxWsHfnddDU2hxc7v2E9kDUr8MbiCYbiMQ1F7YfHdBK5xMNnxkknBTpxrHvEYQgBAM37oC",
    "transactions": [],
    "block_extensions": [],
    "id": "00d805487415a2d5c5f7f03ae719eac64274c23abcc524dbefdc6ef60531e206",
    "block_num": 14157128,
    "ref_block_prefix": 988870597
}

获取到"timestamp": "2018-09-13T07:55:16.500"和"ref_block_prefix": 988870597

5.4 签署交易

过期时间我这里加了20分钟。2018-09-13T07:55:16.500 ==> 2018-09-13T08:15:16.500
注意这里钱包服务的端口为8899

api
http://127.0.0.1:8899/v1/wallet/sign_transaction

params
[{
        "ref_block_num": 14157128,
        "ref_block_prefix": 988870597,
        "expiration": "2018-09-13T08:15:16.500",
        "actions": [{
            "account": "eosio",
            "name": "delegatebw",
            "authorization": [{
                "actor": "testnetyy111",
                "permission": "active"
            }],
            "data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f530000000000"
        }],
        "signatures": []
    },
    ["EOS6Z7mUQeFC2cQTT3xMyZh2wsLQoHih1bTMgRhr3dbichprTi7Rc"], "038f4b0fc8ff18a4f0842a8f0564611f6e96e8535901dd45e43ac8691a1c4dca"
]

return
{
    "expiration": "2018-09-13T08:15:16",
    "ref_block_num": 1352,
    "ref_block_prefix": 988870597,
    "max_net_usage_words": 0,
    "max_cpu_usage_ms": 0,
    "delay_sec": 0,
    "context_free_actions": [],
    "actions": [
        {
            "account": "eosio",
            "name": "delegatebw",
            "authorization": [
                {
                    "actor": "testnetyy111",
                    "permission": "active"
                }
            ],
            "data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f530000000000"
        }
    ],
    "transaction_extensions": [],
    "signatures": [
        "SIG_K1_K86bpaTi2vhSoysvjbJm65e879JpkE64TR18gsgxVZ9yaKfbrpkju5iNWT7QTn6ch3goESm4Nz3ZaF3ZkqQTFGYjpF5kum"
    ],
    "context_free_data": []
}

获取到signatures

5.5 提交交易

api
http://jungle.cryptolions.io:18888/v1/chain/push_transaction

params
{
  "compression": "none",
  "transaction": {
    "expiration": "2018-09-13T08:15:16.500",
    "ref_block_num": 14157128,
    "ref_block_prefix": 988870597,
    "context_free_actions": [],
    "actions": [
        {
            "account": "eosio",
            "name": "delegatebw",
            "authorization": [
                {
                    "actor": "testnetyy111",
                    "permission": "active"
                }
            ],
            "data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f530000000000"
        }
    ],
    "transaction_extensions": []
  },
  "signatures": [
        "SIG_K1_K86bpaTi2vhSoysvjbJm65e879JpkE64TR18gsgxVZ9yaKfbrpkju5iNWT7QTn6ch3goESm4Nz3ZaF3ZkqQTFGYjpF5kum"
   ]
}

return
{
    "transaction_id": "4de32a7b16e567bc95ef8605ca44965f86cabc33afad08f3138c1ef4073b31d4",
    "processed": {
        "id": "4de32a7b16e567bc95ef8605ca44965f86cabc33afad08f3138c1ef4073b31d4",
        "receipt": {
            "status": "executed",
            "cpu_usage_us": 4895,
            "net_usage_words": 18
        },
        "elapsed": 4895,
        "net_usage": 144,
        "scheduled": false,
        "action_traces": [
            {
                "receipt": {
                    "receiver": "eosio",
                    "act_digest": "9191ba96bca789221fc5d3b6ae56f517fe4d4ca52e155992a7abdb2ff486e3e3",
                    "global_sequence": 33560983,
                    "recv_sequence": 15613483,
                    "auth_sequence": [
                        [
                            "testnetyy111",
                            88
                        ]
                    ],
                    "code_sequence": 12,
                    "abi_sequence": 13
                },
                "act": {
                    "account": "eosio",
                    "name": "delegatebw",
                    "authorization": [
                        {
                            "actor": "testnetyy111",
                            "permission": "active"
                        }
                    ],
                    "data": {
                        "from": "testnetyy111",
                        "receiver": "testnetstake",
                        "stake_net_quantity": "100.0000 EOS",
                        "stake_cpu_quantity": "100.0000 EOS",
                        "transfer": 0
                    },
                    "hex_data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f530000000000"
                },
                "elapsed": 3198,
                "cpu_usage": 0,
                "console": "",
                "total_cpu_usage": 0,
                "trx_id": "4de32a7b16e567bc95ef8605ca44965f86cabc33afad08f3138c1ef4073b31d4",
                "inline_traces": [
                    {
                        "receipt": {
                            "receiver": "eosio.token",
                            "act_digest": "047df0b43c3db6ad34ac4a84b025509e529aef9d3442fa54d3fe936ce7863553",
                            "global_sequence": 33560984,
                            "recv_sequence": 1728899,
                            "auth_sequence": [
                                [
                                    "testnetyy111",
                                    89
                                ]
                            ],
                            "code_sequence": 4,
                            "abi_sequence": 4
                        },
                        "act": {
                            "account": "eosio.token",
                            "name": "transfer",
                            "authorization": [
                                {
                                    "actor": "testnetyy111",
                                    "permission": "active"
                                }
                            ],
                            "data": {
                                "from": "testnetyy111",
                                "to": "eosio.stake",
                                "quantity": "200.0000 EOS",
                                "memo": "stake bandwidth"
                            },
                            "hex_data": "1042f03eab99b1ca0014341903ea305580841e000000000004454f53000000000f7374616b652062616e647769647468"
                        },
                        "elapsed": 982,
                        "cpu_usage": 0,
                        "console": "",
                        "total_cpu_usage": 0,
                        "trx_id": "4de32a7b16e567bc95ef8605ca44965f86cabc33afad08f3138c1ef4073b31d4",
                        "inline_traces": [
                            {
                                "receipt": {
                                    "receiver": "testnetyy111",
                                    "act_digest": "047df0b43c3db6ad34ac4a84b025509e529aef9d3442fa54d3fe936ce7863553",
                                    "global_sequence": 33560985,
                                    "recv_sequence": 30,
                                    "auth_sequence": [
                                        [
                                            "testnetyy111",
                                            90
                                        ]
                                    ],
                                    "code_sequence": 4,
                                    "abi_sequence": 4
                                },
                                "act": {
                                    "account": "eosio.token",
                                    "name": "transfer",
                                    "authorization": [
                                        {
                                            "actor": "testnetyy111",
                                            "permission": "active"
                                        }
                                    ],
                                    "data": {
                                        "from": "testnetyy111",
                                        "to": "eosio.stake",
                                        "quantity": "200.0000 EOS",
                                        "memo": "stake bandwidth"
                                    },
                                    "hex_data": "1042f03eab99b1ca0014341903ea305580841e000000000004454f53000000000f7374616b652062616e647769647468"
                                },
                                "elapsed": 148,
                                "cpu_usage": 0,
                                "console": "",
                                "total_cpu_usage": 0,
                                "trx_id": "4de32a7b16e567bc95ef8605ca44965f86cabc33afad08f3138c1ef4073b31d4",
                                "inline_traces": []
                            },
                            {
                                "receipt": {
                                    "receiver": "eosio.stake",
                                    "act_digest": "047df0b43c3db6ad34ac4a84b025509e529aef9d3442fa54d3fe936ce7863553",
                                    "global_sequence": 33560986,
                                    "recv_sequence": 238796,
                                    "auth_sequence": [
                                        [
                                            "testnetyy111",
                                            91
                                        ]
                                    ],
                                    "code_sequence": 4,
                                    "abi_sequence": 4
                                },
                                "act": {
                                    "account": "eosio.token",
                                    "name": "transfer",
                                    "authorization": [
                                        {
                                            "actor": "testnetyy111",
                                            "permission": "active"
                                        }
                                    ],
                                    "data": {
                                        "from": "testnetyy111",
                                        "to": "eosio.stake",
                                        "quantity": "200.0000 EOS",
                                        "memo": "stake bandwidth"
                                    },
                                    "hex_data": "1042f03eab99b1ca0014341903ea305580841e000000000004454f53000000000f7374616b652062616e647769647468"
                                },
                                "elapsed": 27,
                                "cpu_usage": 0,
                                "console": "",
                                "total_cpu_usage": 0,
                                "trx_id": "4de32a7b16e567bc95ef8605ca44965f86cabc33afad08f3138c1ef4073b31d4",
                                "inline_traces": []
                            }
                        ]
                    }
                ]
            }
        ],
        "except": null
    }
}

5.6 查看账户

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetstake
permissions: 
     owner     1:    1 EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
        active     1:    1 EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up
memory: 
     quota:     1.552 MiB    used:     2.926 KiB  

net bandwidth: 
     delegated:     100.0000 EOS           (total staked delegated to account from others)
     used:                 0 bytes
     available:        18.29 MiB  
     limit:            18.29 MiB  

cpu bandwidth:
     delegated:     100.0000 EOS           (total staked delegated to account from others)
     used:                 0 us   
     available:        3.651 sec  
     limit:            3.651 sec

可以看到CPU和NET各租借了100EOS

5.7 `testnetstake`尝试赎回资源

我们先尝试使用testnetstake账户赎回由testnetyy111租借给自己的资源。打开并解锁钱包stake.wallet，将testnetstake的私钥导入。下面需要由testnetstake签署交易

5.8 生成赎回资源的bin字符串

调用eosio合约的undelegatebw方法
传入赎回者账户名称和接收者账户名称
赎回价值100EOS的CPU和NET

api
http://jungle.cryptolions.io:18888/v1/chain/abi_json_to_bin

params
{
    "code": "eosio",
    "action": "undelegatebw",
    "args": {
        "from": "testnetstake",
        "receiver": "testnetstake",
        "unstake_net_quantity": "100.0000 EOS",
        "unstake_cpu_quantity": "100.0000 EOS"
    }
}

return
{
    "binargs": "a0a0c938ab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
}

5.9 获取当前最新的区块号

api
http://jungle.cryptolions.io:18888/v1/chain/get_info

params
无

return
{
    "server_version": "08819aae",
    "chain_id": "038f4b0fc8ff18a4f0842a8f0564611f6e96e8535901dd45e43ac8691a1c4dca",
    "head_block_num": 14163505,
    "last_irreversible_block_num": 14163180,
    "last_irreversible_block_id": "00d81cecbc3f09fef84f00732ccb8400224af86bde742823356e704f00a6afc2",
    "head_block_id": "00d81e3160bc55a2de6e7ca13f771d8c481e9906ef83cfb1ab770d36b3144c69",
    "head_block_time": "2018-09-13T08:50:24.500",
    "head_block_producer": "atticlabjbpn",
    "virtual_block_cpu_limit": 200000000,
    "virtual_block_net_limit": 1048576000,
    "block_cpu_limit": 199900,
    "block_net_limit": 1048576,
    "server_version_string": "v1.2.5-dirty"
}

获取到区块号"head_block_num": 14163505

5.10 获取当前区块详情

api
http://jungle.cryptolions.io:18888/v1/chain/get_block

params
{"block_num_or_id":"14163505"}

return
{
    "timestamp": "2018-09-13T08:50:24.500",
    "producer": "atticlabjbpn",
    "confirmed": 0,
    "previous": "00d81e30541ebd7f20b776eb4d08f6caaefa774e540784c65cc152c4a8776579",
    "transaction_mroot": "ca199973357ca4587d01e875b2478ad6fcd1c443de6ab66d8b34933fdf791761",
    "action_mroot": "fe4bab83f379ec92f5695be402014b73bd6f38ab3aa2c4c6d2b8ceb9daa09959",
    "schedule_version": 223,
    "new_producers": null,
    "header_extensions": [],
    "producer_signature": "SIG_K1_JvUmSxB1NSDW6H6UkqxXxyTAZ9cehCr2pEK7F1G5zYnsYVyDfpFgpDQviYNH61gbNbKRkJtf3iXoX7s7JXbHrBtzrJQope",
    "transactions": [
        {
            "status": "executed",
            "cpu_usage_us": 1159,
            "net_usage_words": 20,
            "trx": {
                "id": "56f8f7b3c231292eb27d1711ba0297f8008cab1917f79866614cd0aff3a549c8",
                "signatures": [
                    "SIG_K1_KVg8FwTN6tewinydJ6AoMa8Sg2FX8RxWi9ErmFdS9ypKogGraoEs3jzRK3SyZ7omv33SeuyJcEd9DhWDNPfCCo32JSHC3w"
                ],
                "compression": "none",
                "packed_context_free_data": "",
                "context_free_data": [],
                "packed_trx": "ee249a5bec1cf84f00730000000100408c7a02ea3055000000000085269d0008cf3238ccbc750500017055ce8e6788683c0000000080ac14cf0180277591e6ea2f3200000000a8ed323225245745204c4f564520424d20e299a52e204a756e676c6520746573742e202320313937363300",
                "transaction": {
                    "expiration": "2018-09-13T08:50:54",
                    "ref_block_num": 7404,
                    "ref_block_prefix": 1929400312,
                    "max_net_usage_words": 0,
                    "max_cpu_usage_ms": 0,
                    "delay_sec": 0,
                    "context_free_actions": [
                        {
                            "account": "eosio.null",
                            "name": "nonce",
                            "authorization": [],
                            "data": "cf3238ccbc750500"
                        }
                    ],
                    "actions": [
                        {
                            "account": "blocktwitter",
                            "name": "tweet",
                            "authorization": [
                                {
                                    "actor": "acryptolions",
                                    "permission": "active"
                                }
                            ],
                            "data": {
                                "message": "WE LOVE BM ♥. Jungle test. # 19763"
                            },
                            "hex_data": "245745204c4f564520424d20e299a52e204a756e676c6520746573742e2023203139373633"
                        }
                    ],
                    "transaction_extensions": []
                }
            }
        }
    ],
    "block_extensions": [],
    "id": "00d81e3160bc55a2de6e7ca13f771d8c481e9906ef83cfb1ab770d36b3144c69",
    "block_num": 14163505,
    "ref_block_prefix": 2709286622
}

获取到"timestamp": "2018-09-13T08:50:24.500"和"ref_block_prefix": 2709286622

5.11 签署交易

过期时间我这里加了20分钟。2018-09-13T08:50:24.500 ==> 2018-09-13T09:10:24.500

api
http://127.0.0.1:8899/v1/wallet/sign_transaction

params
[{
        "ref_block_num": 14163505,
        "ref_block_prefix": 2709286622,
        "expiration": "2018-09-13T09:10:24.500",
        "actions": [{
            "account": "eosio",
            "name": "undelegatebw",
            "authorization": [{
                "actor": "testnetstake",
                "permission": "active"
            }],
            "data": "a0a0c938ab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
        }],
        "signatures": []
    },
    ["EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up"], "038f4b0fc8ff18a4f0842a8f0564611f6e96e8535901dd45e43ac8691a1c4dca"
]

return
{
    "expiration": "2018-09-13T09:10:24",
    "ref_block_num": 7729,
    "ref_block_prefix": 2709286622,
    "max_net_usage_words": 0,
    "max_cpu_usage_ms": 0,
    "delay_sec": 0,
    "context_free_actions": [],
    "actions": [
        {
            "account": "eosio",
            "name": "undelegatebw",
            "authorization": [
                {
                    "actor": "testnetstake",
                    "permission": "active"
                }
            ],
            "data": "a0a0c938ab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
        }
    ],
    "transaction_extensions": [],
    "signatures": [
        "SIG_K1_JzBA4onsfRYecBwZr21yVshj9ii2e5nUB5kMVvfMS5BVwAPsj1NH6SVW5LBraoBpQX8KoWjpgXP3W4PQe9wNkZ9aQ8K3wm"
    ],
    "context_free_data": []
}

获取到signatures

5.12 提交交易

api
http://jungle.cryptolions.io:18888/v1/chain/push_transaction

params
{
  "compression": "none",
  "transaction": {
    "expiration": "2018-09-13T09:10:24.500",
    "ref_block_num": 14163505,
    "ref_block_prefix": 2709286622,
    "context_free_actions": [],
    "actions": [
        {
            "account": "eosio",
            "name": "undelegatebw",
            "authorization": [
                {
                    "actor": "testnetstake",
                    "permission": "active"
                }
            ],
            "data": "a0a0c938ab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
        }
    ],
    "transaction_extensions": []
  },
  "signatures": [
        "SIG_K1_JzBA4onsfRYecBwZr21yVshj9ii2e5nUB5kMVvfMS5BVwAPsj1NH6SVW5LBraoBpQX8KoWjpgXP3W4PQe9wNkZ9aQ8K3wm"
   ]
}

return
{
    "code": 500,
    "message": "Internal Service Error",
    "error": {
        "code": 3050003,
        "name": "eosio_assert_message_exception",
        "what": "eosio_assert_message assertion failure",
        "details": [
            {
                "message": "assertion failure with message: insufficient staked net bandwidth",
                "file": "wasm_interface.cpp",
                "line_number": 930,
                "method": "eosio_assert"
            },
            {
                "message": "pending console output: ",
                "file": "apply_context.cpp",
                "line_number": 61,
                "method": "exec_one"
            }
        ]
    }
}

报错提示staked资源不足。和我们预想的一样，无法将别人租借给自己的资源，赎回成EOS给自己的账户。接下来我们使用testnetyy111来赎回租借给testnetstake的资源

5.13 生成赎回资源的bin字符串

from : 解除用哪个账号所抵押的代币
receiver : 解除作用在哪个账号上的抵押代币

api
http://jungle.cryptolions.io:18888/v1/chain/abi_json_to_bin

params
{
    "code": "eosio",
    "action": "undelegatebw",
    "args": {
        "from": "testnetyy111",
        "receiver": "testnetstake",
        "unstake_net_quantity": "100.0000 EOS",
        "unstake_cpu_quantity": "100.0000 EOS"
    }
}

return
{
    "binargs": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
}

5.14 获取当前最新的区块号

api
http://jungle.cryptolions.io:18888/v1/chain/get_info

params
无

return
{
    "server_version": "08819aae",
    "chain_id": "038f4b0fc8ff18a4f0842a8f0564611f6e96e8535901dd45e43ac8691a1c4dca",
    "head_block_num": 14168523,
    "last_irreversible_block_num": 14168193,
    "last_irreversible_block_id": "00d83081e104e331a6904f88310ba656c04e52921b20f893e99e76b785996793",
    "head_block_id": "00d831cbeea798d092dc105e5927b9d247e92072453699eb2dacd5b707c9bdc3",
    "head_block_time": "2018-09-13T09:34:40.500",
    "head_block_producer": "blockgenesys",
    "virtual_block_cpu_limit": 200000000,
    "virtual_block_net_limit": 1048576000,
    "block_cpu_limit": 199089,
    "block_net_limit": 1048416,
    "server_version_string": "v1.2.5-dirty"
}

获取到区块号"head_block_num": 14168523

5.15 获取当前区块详情

api
http://jungle.cryptolions.io:18888/v1/chain/get_block

params
{"block_num_or_id":"14168523"}

return
{
    "timestamp": "2018-09-13T09:34:40.500",
    "producer": "blockgenesys",
    "confirmed": 0,
    "previous": "00d831cadfecabb333f5c2a3a72924186dc860057ee139573ba90b219fc5560e",
    "transaction_mroot": "ae2a66f513cbc9589d00be07102fb9144fe9ca3490c23489953c46258f2c9345",
    "action_mroot": "c923f03e82cce8193100a47d9c58798bf2b0b6472f950da983889e4c94a05065",
    "schedule_version": 223,
    "new_producers": null,
    "header_extensions": [],
    "producer_signature": "SIG_K1_K4rAkncocM8JVA7H5ZKDAP3bbNuEku9LmdhXGvG45uYwjdhbrwMCqPdCrBecPvahJfkZn5Ydi1KWysY2gPRpFK5Emp7PpQ",
    "transactions": [
        {
            "status": "executed",
            "cpu_usage_us": 637,
            "net_usage_words": 20,
            "trx": {
                "id": "b90962a0a0301f5239d079bddfcaa858ef819da860c8d60160c72894722b9f57",
                "signatures": [
                    "SIG_K1_Kf5QjHpFVCpM9fcHnCWPFgwvrqvEb4hpHe7mEjGGCc7sErq5tUp4du75FBSac3j8i6874LExQX7EUSrg88spYAyTgWUecA"
                ],
                "compression": "none",
                "packed_context_free_data": "",
                "context_free_data": [],
                "packed_trx": "4e2f9a5b8130a6904f880000000100408c7a02ea3055000000000085269d0008ceee886abd750500017055ce8e6788683c0000000080ac14cf0180277591e6ea2f3200000000a8ed323225245745204c4f564520424d20e299a52e204a756e676c6520746573742e202320333136343500",
                "transaction": {
                    "expiration": "2018-09-13T09:35:10",
                    "ref_block_num": 12417,
                    "ref_block_prefix": 2286915750,
                    "max_net_usage_words": 0,
                    "max_cpu_usage_ms": 0,
                    "delay_sec": 0,
                    "context_free_actions": [
                        {
                            "account": "eosio.null",
                            "name": "nonce",
                            "authorization": [],
                            "data": "ceee886abd750500"
                        }
                    ],
                    "actions": [
                        {
                            "account": "blocktwitter",
                            "name": "tweet",
                            "authorization": [
                                {
                                    "actor": "acryptolions",
                                    "permission": "active"
                                }
                            ],
                            "data": {
                                "message": "WE LOVE BM ♥. Jungle test. # 31645"
                            },
                            "hex_data": "245745204c4f564520424d20e299a52e204a756e676c6520746573742e2023203331363435"
                        }
                    ],
                    "transaction_extensions": []
                }
            }
        }
    ],
    "block_extensions": [],
    "id": "00d831cbeea798d092dc105e5927b9d247e92072453699eb2dacd5b707c9bdc3",
    "block_num": 14168523,
    "ref_block_prefix": 1578163346
}

获取到"timestamp": "2018-09-13T09:34:40.500"和"ref_block_prefix": 1578163346

5.16 签署交易

过期时间我这里加了20分钟。2018-09-13T09:34:40.500 ==> 2018-09-13T09:54:40.500
注意这里使用的是含有testnetyy111密钥的钱包

api
http://127.0.0.1:8899/v1/wallet/sign_transaction

params
[{
        "ref_block_num": 14168523,
        "ref_block_prefix": 1578163346,
        "expiration": "2018-09-13T09:54:40.500",
        "actions": [{
            "account": "eosio",
            "name": "undelegatebw",
            "authorization": [{
                "actor": "testnetyy111",
                "permission": "active"
            }],
            "data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
        }],
        "signatures": []
    },
    ["EOS6Z7mUQeFC2cQTT3xMyZh2wsLQoHih1bTMgRhr3dbichprTi7Rc"], "038f4b0fc8ff18a4f0842a8f0564611f6e96e8535901dd45e43ac8691a1c4dca"
]

return
{
    "expiration": "2018-09-13T09:54:40",
    "ref_block_num": 12747,
    "ref_block_prefix": 1578163346,
    "max_net_usage_words": 0,
    "max_cpu_usage_ms": 0,
    "delay_sec": 0,
    "context_free_actions": [],
    "actions": [
        {
            "account": "eosio",
            "name": "undelegatebw",
            "authorization": [
                {
                    "actor": "testnetyy111",
                    "permission": "active"
                }
            ],
            "data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
        }
    ],
    "transaction_extensions": [],
    "signatures": [
        "SIG_K1_KjS2QqDGc5Pt6ezznN837dt5W5NCaczW6yKJvmfsFkrUBBk3xsjdv2KiHtJReSnBWhzf172movkGhfzyDfCaXgLdY7d56t"
    ],
    "context_free_data": []
}

获取到signatures

5.17 提交交易

api
http://jungle.cryptolions.io:18888/v1/chain/push_transaction

params
{
  "compression": "none",
  "transaction": {
    "expiration": "2018-09-13T09:54:40.500",
    "ref_block_num": 14168523,
    "ref_block_prefix": 1578163346,
    "context_free_actions": [],
    "actions": [
        {
            "account": "eosio",
            "name": "undelegatebw",
            "authorization": [
                {
                    "actor": "testnetyy111",
                    "permission": "active"
                }
            ],
            "data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
        }
    ],
    "transaction_extensions": []
  },
  "signatures": [
        "SIG_K1_KjS2QqDGc5Pt6ezznN837dt5W5NCaczW6yKJvmfsFkrUBBk3xsjdv2KiHtJReSnBWhzf172movkGhfzyDfCaXgLdY7d56t"
   ]
}

return
{
    "transaction_id": "d234efd776806e2be3f611c25dd79e12cecb4de813c610301ac0311066a65db6",
    "processed": {
        "id": "d234efd776806e2be3f611c25dd79e12cecb4de813c610301ac0311066a65db6",
        "receipt": {
            "status": "executed",
            "cpu_usage_us": 4044,
            "net_usage_words": 23
        },
        "elapsed": 4044,
        "net_usage": 184,
        "scheduled": false,
        "action_traces": [
            {
                "receipt": {
                    "receiver": "eosio",
                    "act_digest": "2a9b1145aa3051eab4dffd31b7cb6b18a688a190caf1d7f4b472a97e888fcc6a",
                    "global_sequence": 33588135,
                    "recv_sequence": 15624244,
                    "auth_sequence": [
                        [
                            "testnetyy111",
                            92
                        ]
                    ],
                    "code_sequence": 12,
                    "abi_sequence": 13
                },
                "act": {
                    "account": "eosio",
                    "name": "undelegatebw",
                    "authorization": [
                        {
                            "actor": "testnetyy111",
                            "permission": "active"
                        }
                    ],
                    "data": {
                        "from": "testnetyy111",
                        "receiver": "testnetstake",
                        "unstake_net_quantity": "100.0000 EOS",
                        "unstake_cpu_quantity": "100.0000 EOS"
                    },
                    "hex_data": "1042f03eab99b1caa0a0c938ab99b1ca40420f000000000004454f530000000040420f000000000004454f5300000000"
                },
                "elapsed": 3544,
                "cpu_usage": 0,
                "console": "",
                "total_cpu_usage": 0,
                "trx_id": "d234efd776806e2be3f611c25dd79e12cecb4de813c610301ac0311066a65db6",
                "inline_traces": []
            }
        ],
        "except": null
    }
}

5.18 查看账户

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetstake
permissions: 
     owner     1:    1 EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
        active     1:    1 EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up
memory: 
     quota:     1.552 MiB    used:     2.926 KiB  

net bandwidth: 
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:                 0 bytes
     available:            0 bytes
     limit:                0 bytes

cpu bandwidth:
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:                 0 us   
     available:            0 us   
     limit:                0 us

可以看到账户testnetstake的抵押资源已被赎回，都已经为0了。

我们再看下testnetyy111账户的情况：

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetyy111
permissions: 
     owner     1:    1 EOS6cnhSLTn4eSUEqS4nC8frYTsVsjeH2M3hos1TUeCgme2Yim5Q5
        active     1:    1 EOS6Z7mUQeFC2cQTT3xMyZh2wsLQoHih1bTMgRhr3dbichprTi7Rc
memory: 
     quota:     3.377 MiB    used:       191 KiB  

net bandwidth: 
     staked:        100.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:              1.11 KiB  
     available:        18.29 MiB  
     limit:            18.29 MiB  

cpu bandwidth:
     staked:        100.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:             38.27 ms   
     available:        3.613 sec  
     limit:            3.651 sec  

unstaking:
     time of unstake request:  2018-09-13T09:39:42 (funds will be available in 71.65 hr)
     from net bandwidth:            100.0000 EOS
     from cpu bandwidth:            100.0000 EOS
     total:                         200.0000 EOS

EOS balances: 
     liquid:         8562.2670 EOS
     staked:          200.0000 EOS
     unstaking:       200.0000 EOS
     total:          8962.2670 EOS

producers:     <not voted>

出现了赎回信息unstaking，共有200EOS将在72小时之内到账。

5. A以赠送的形式为B抵押资源

这里不再详细贴代码的。首先生成bin字符串，这次将transfer设为1：

{
    "code": "eosio",
    "action": "delegatebw",
    "args": {
        "from": "testnetyy111",
        "receiver": "testnetstake",
        "stake_net_quantity": "100.0000 EOS",
        "stake_cpu_quantity": "100.0000 EOS",
        "transfer": 1,
    }
}

按之前的流程，抵押成功后查看下testnetstake账户情况：

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetstake
permissions: 
     owner     1:    1 EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
        active     1:    1 EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up
memory: 
     quota:     1.552 MiB    used:     3.365 KiB  

net bandwidth: 
     staked:        100.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:                 0 bytes
     available:        18.29 MiB  
     limit:            18.29 MiB  

cpu bandwidth:
     staked:        100.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:                 0 us   
     available:        3.651 sec  
     limit:            3.651 sec  

producers:     <not voted>

可以看到抵押资源的形式为staked

由于赎回资源需要使用到CPU和NET资源，所以我们无法将各100EOS的资源全部赎回，否则会报错，这里我们只各赎回90EOS的资源。

生成赎回资源的字符串，testnetstake自己赎回资源：

{
    "code": "eosio",
    "action": "undelegatebw",
    "args": {
        "from": "testnetstake",
        "receiver": "testnetstake",
        "unstake_net_quantity": "90.0000 EOS",
        "unstake_cpu_quantity": "90.0000 EOS"
    }
}

按流程来，最后提交交易成功后，查看下testnetstake的账户情况：

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetstake
permissions: 
     owner     1:    1 EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
        active     1:    1 EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up
memory: 
     quota:     1.552 MiB    used:     3.951 KiB  

net bandwidth: 
     staked:         10.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:               185 bytes
     available:        1.829 MiB  
     limit:            1.829 MiB  

cpu bandwidth:
     staked:         10.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:             3.275 ms   
     available:        361.9 ms   
     limit:            365.1 ms   

unstaking tokens:
     time of unstake request:  2018-09-13T10:15:54 (funds will be available in 71.94 hr)
     from net bandwidth:             90.0000 EOS
     from cpu bandwidth:             90.0000 EOS
     total:                         180.0000 EOS

producers:     <not voted>

可以看到账户中的CPU和NET资源各只剩下10EOS。并且出现了赎回信息，共有180EOS将在72小时之内到账。

我们继续试验，A以赠送的形式为B抵押资源，那么A是否可以将抵押给B的资源赎回并将EOS发送回自己的账户呢？

首先，testnetyy111再以赠送的方式为testnetstake抵押各100EOS的资源：

{
    "code": "eosio",
    "action": "delegatebw",
    "args": {
        "from": "testnetyy111",
        "receiver": "testnetstake",
        "stake_net_quantity": "100.0000 EOS",
        "stake_cpu_quantity": "100.0000 EOS",
        "transfer": 1,
    }
}

最后提交抵押请求成功后，查看下testnetstake账户的情况：

yuyangdeMacBook-Pro:cleos yuyang$ cleos -u "http://jungle.cryptolions.io:18888" get account testnetstake
permissions: 
     owner     1:    1 EOS7RKPFD8228owd1BG1aiwYThSTLp3huiq9J3gWCwW3CjAoBtsJf
        active     1:    1 EOS6KDP2yjhD5E6ESyviF2qgUoH2bsyy6ybm5KTrMJstb6Mbxy3up
memory: 
     quota:     1.552 MiB    used:     3.627 KiB  

net bandwidth: 
     staked:        110.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:               185 bytes
     available:        20.12 MiB  
     limit:            20.12 MiB  

cpu bandwidth:
     staked:        110.0000 EOS           (total stake delegated from account to self)
     delegated:       0.0000 EOS           (total staked delegated to account from others)
     used:             3.275 ms   
     available:        4.013 sec  
     limit:            4.016 sec  

unstaking tokens:
     time of unstake request:  2018-09-13T10:15:54 (funds will be available in 71.78 hr)
     from net bandwidth:             90.0000 EOS
     from cpu bandwidth:             90.0000 EOS
     total:                         180.0000 EOS

producers:     <not voted>

可以看到各有110EOS的抵押资源

我们使用testnetyy111来赎回抵押给testnetstake的资源：

{
    "code": "eosio",
    "action": "undelegatebw",
    "args": {
        "from": "testnetyy111",
        "receiver": "testnetstake",
        "unstake_net_quantity": "100.0000 EOS",
        "unstake_cpu_quantity": "100.0000 EOS"
    }
}

最后提交交易：

{
    "code": 500,
    "message": "Internal Service Error",
    "error": {
        "code": 3050003,
        "name": "eosio_assert_message_exception",
        "what": "eosio_assert_message assertion failure",
        "details": [
            {
                "message": "assertion failure with message: insufficient staked net bandwidth",
                "file": "wasm_interface.cpp",
                "line_number": 930,
                "method": "eosio_assert"
            },
            {
                "message": "pending console output: ",
                "file": "apply_context.cpp",
                "line_number": 61,
                "method": "exec_one"
            }
        ]
    }
}

可以看到抵押资源不足的错误提示，表明无法将赠送给他人的资源赎回给自己。

6. B自己抵押资源并且赎回

这部分内容就不演示了，通过上面的演示，肯定是可以的，大家可以自己动手试试。

    原文作者：yuyangray
    原文地址: https://www.jianshu.com/p/c64d33d457b6
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。

1. 前言

2. CPU和NET

3. 目标

4. 准备工作

5. A以租借的形式为B抵押资源

5.1 生成抵押的bin字符串

5.2 获取当前最新的区块号

5.3 获取当前区块详情

5.4 签署交易

5.5 提交交易

5.6 查看账户

5.7 testnetstake尝试赎回资源

5.8 生成赎回资源的bin字符串

5.9 获取当前最新的区块号

5.10 获取当前区块详情

5.11 签署交易

5.12 提交交易

5.13 生成赎回资源的bin字符串

5.14 获取当前最新的区块号

5.15 获取当前区块详情

5.16 签署交易

5.17 提交交易

5.18 查看账户

5. A以赠送的形式为B抵押资源

6. B自己抵押资源并且赎回

5.7 `testnetstake`尝试赎回资源