函数 getAccountBalance() 不起作用

我正在创建示例与其他开发人员共享，但我现在尝试保持非常简单的代码，所有基本功能都在工作：

我正在使用官方文档。LINK https://docs.near.org/docs/api/naj-quick-reference#connect

account.deleteAccount()
account.getAccountDetails()
account.createAccount()

等等...但是这个功能：

account.getAccountBalance();

向我发送错误：

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading "storage_amount _per_byte" )
at Account.getAccountBalance (VM3453 near-api-is.is:346)
at async main.is: 46

+++++更新++++++

const CONTRACT_NAME = 'josedlujan.testnet'; /* TODO: fill this in! */
const config = {
    nodeUrl: "https://rpc.testnet.near.org",
    //deps: {
        keyStore: new nearApi.keyStores.BrowserLocalStorageKeyStore(),
    //},
    networkId: 'testnet',
        nodeUrl: 'https://rpc.testnet.near.org',
    contractName: CONTRACT_NAME,
    walletUrl: 'https://wallet.testnet.near.org',
    helperUrl: 'https://helper.testnet.near.org'


};

async function () {
    window.near = await nearApi.connect(config);
    console.log(near)
    // ---------------------------------------------------------------------------
    // here you have access to `near-api-js` and a valid connection object `near`
    // ---------------------------------------------------------------------------
    window.walletConnection = new nearApi.WalletConnection(near);
    console.log(window.walletConnection)

    // Initializing our contract APIs by contract name and configuration.
    window.contract = await new nearApi.Contract(window.walletConnection.account(), near.contractName, {
        // View methods are read-only – they don't modify the state, but usually return some value
        viewMethods: ['get_num'],
        // Change methods can modify the state, but you don't receive the returned value when called
        changeMethods: ['increment', 'decrement', 'reset'],
        // Sender is the account ID to initialize transactions.
        // getAccountId() will return empty string if user is still unauthorized
        sender: window.walletConnection.getAccountId()
    });

 window.account = await near.account(walletConnection.getAccountId());
    console.log(window.account);

 const balance = await window.account.getAccountBalance();
    console.log(balance);

在试图了解可能会发生什么问题时，这就是我所做的......

(1)看源码

这是您在调用该方法时运行的代码。我通过在中搜索字符串“getAccountBalance”找到了它near-api-js https://github.com/near/near-api-jsrepo 因为我看到你正在 JavaScript 上下文中运行，并且我知道 NEAR 将其 API 包装为near-api-js让 JavaScript 开发人员的生活更轻松。

account.getAccountBalance() https://github.com/near/near-api-js/blob/fd6d643dd9f0d4815a5f14b0525750e86433c862/src/account.ts#L605-L622

async getAccountBalance(): Promise < AccountBalance > {
  const protocolConfig = await this.connection.provider.experimental_protocolConfig({ finality: 'final' });
  const state = await this.state();

  const costPerByte = new BN(protocolConfig.runtime_config.storage_amount_per_byte);
  const stateStaked = new BN(state.storage_usage).mul(costPerByte);
  const staked = new BN(state.locked);
  const totalBalance = new BN(state.amount).add(staked);
  const availableBalance = totalBalance.sub(BN.max(staked, stateStaked));

  return {
    total: totalBalance.toString(),
    stateStaked: stateStaked.toString(),
    staked: staked.toString(),
    available: availableBalance.toString()
  };
}

函数调用的第一行experimental_protocolConfig

await this.connection.provider.experimental_protocolConfig({ finality: 'final' });

(2) 分段测试

我可以获取这个函数的每一部分，并从 NEAR CLI 中可用的 REPL 中一一调用它，并检查它返回的内容

首先，在上下文中使用您的帐户启动 repl

near repl --accountId sherif.testnet

然后，调用该方法

await account.getAccountBalance()

结果对我来说很好

{
  total: '21795471561668895374325524265',
  stateStaked: '212510000000000000000000',
  staked: '0',
  available: '21795259051668895374325524265'
}

然后，调用该方法

await account.connection.provider.experimental_protocolConfig({ finality: 'final'})

你会看到返回值

{
  "protocol_version": 50,
  "genesis_time": "2020-07-31T03:39:42.911378Z",
  "chain_id": "testnet",
  "genesis_height": 42376888,
  "num_block_producer_seats": 200,
  "num_block_producer_seats_per_shard": [
    200,
    200,
    200,
    200
  ],
  "avg_hidden_validator_seats_per_shard": [
    0,
    0,
    0,
    0
  ],
  "dynamic_resharding": false,
  "protocol_upgrade_stake_threshold": [
    4,
    5
  ],
  "epoch_length": 43200,
  "gas_limit": 1000000000000000,
  "min_gas_price": "5000",
  "max_gas_price": "10000000000000000000000",
  "block_producer_kickout_threshold": 80,
  "chunk_producer_kickout_threshold": 90,
  "online_min_threshold": [
    90,
    100
  ],
  "online_max_threshold": [
    99,
    100
  ],
  "gas_price_adjustment_rate": [
    1,
    100
  ],
  "runtime_config": {
    "storage_amount_per_byte": "10000000000000000000",
    "transaction_costs": {
      "action_receipt_creation_config": {
        "send_sir": 108059500000,
        "send_not_sir": 108059500000,
        "execution": 108059500000
      },
      "data_receipt_creation_config": {
        "base_cost": {
          "send_sir": 36486732312,
          "send_not_sir": 36486732312,
          "execution": 36486732312
        },
        "cost_per_byte": {
          "send_sir": 17212011,
          "send_not_sir": 17212011,
          "execution": 17212011
        }
      },
      "action_creation_config": {
        "create_account_cost": {
          "send_sir": 99607375000,
          "send_not_sir": 99607375000,
          "execution": 99607375000
        },
        "deploy_contract_cost": {
          "send_sir": 184765750000,
          "send_not_sir": 184765750000,
          "execution": 184765750000
        },
        "deploy_contract_cost_per_byte": {
          "send_sir": 6812999,
          "send_not_sir": 6812999,
          "execution": 6812999
        },
        "function_call_cost": {
          "send_sir": 2319861500000,
          "send_not_sir": 2319861500000,
          "execution": 2319861500000
        },
        "function_call_cost_per_byte": {
          "send_sir": 2235934,
          "send_not_sir": 2235934,
          "execution": 2235934
        },
        "transfer_cost": {
          "send_sir": 115123062500,
          "send_not_sir": 115123062500,
          "execution": 115123062500
        },
        "stake_cost": {
          "send_sir": 141715687500,
          "send_not_sir": 141715687500,
          "execution": 102217625000
        },
        "add_key_cost": {
          "full_access_cost": {
            "send_sir": 101765125000,
            "send_not_sir": 101765125000,
            "execution": 101765125000
          },
          "function_call_cost": {
            "send_sir": 102217625000,
            "send_not_sir": 102217625000,
            "execution": 102217625000
          },
          "function_call_cost_per_byte": {
            "send_sir": 1925331,
            "send_not_sir": 1925331,
            "execution": 1925331
          }
        },
        "delete_key_cost": {
          "send_sir": 94946625000,
          "send_not_sir": 94946625000,
          "execution": 94946625000
        },
        "delete_account_cost": {
          "send_sir": 147489000000,
          "send_not_sir": 147489000000,
          "execution": 147489000000
        }
      },
      "storage_usage_config": {
        "num_bytes_account": 100,
        "num_extra_bytes_record": 40
      },
      "burnt_gas_reward": [
        3,
        10
      ],
      "pessimistic_gas_price_inflation_ratio": [
        103,
        100
      ]
    },
    "wasm_config": {
      "ext_costs": {
        "base": 264768111,
        "contract_compile_base": 35445963,
        "contract_compile_bytes": 216750,
        "read_memory_base": 2609863200,
        "read_memory_byte": 3801333,
        "write_memory_base": 2803794861,
        "write_memory_byte": 2723772,
        "read_register_base": 2517165186,
        "read_register_byte": 98562,
        "write_register_base": 2865522486,
        "write_register_byte": 3801564,
        "utf8_decoding_base": 3111779061,
        "utf8_decoding_byte": 291580479,
        "utf16_decoding_base": 3543313050,
        "utf16_decoding_byte": 163577493,
        "sha256_base": 4540970250,
        "sha256_byte": 24117351,
        "keccak256_base": 5879491275,
        "keccak256_byte": 21471105,
        "keccak512_base": 5811388236,
        "keccak512_byte": 36649701,
        "ripemd160_base": 853675086,
        "ripemd160_block": 680107584,
        "ecrecover_base": 278821988457,
        "log_base": 3543313050,
        "log_byte": 13198791,
        "storage_write_base": 64196736000,
        "storage_write_key_byte": 70482867,
        "storage_write_value_byte": 31018539,
        "storage_write_evicted_byte": 32117307,
        "storage_read_base": 56356845750,
        "storage_read_key_byte": 30952533,
        "storage_read_value_byte": 5611005,
        "storage_remove_base": 53473030500,
        "storage_remove_key_byte": 38220384,
        "storage_remove_ret_value_byte": 11531556,
        "storage_has_key_base": 54039896625,
        "storage_has_key_byte": 30790845,
        "storage_iter_create_prefix_base": 0,
        "storage_iter_create_prefix_byte": 0,
        "storage_iter_create_range_base": 0,
        "storage_iter_create_from_byte": 0,
        "storage_iter_create_to_byte": 0,
        "storage_iter_next_base": 0,
        "storage_iter_next_key_byte": 0,
        "storage_iter_next_value_byte": 0,
        "touching_trie_node": 16101955926,
        "promise_and_base": 1465013400,
        "promise_and_per_promise": 5452176,
        "promise_return": 560152386,
        "validator_stake_base": 911834726400,
        "validator_total_stake_base": 911834726400
      },
      "grow_mem_cost": 1,
      "regular_op_cost": 822756,
      "limit_config": {
        "max_gas_burnt": 200000000000000,
        "max_stack_height": 16384,
        "stack_limiter_version": 1,
        "initial_memory_pages": 1024,
        "max_memory_pages": 2048,
        "registers_memory_limit": 1073741824,
        "max_register_size": 104857600,
        "max_number_registers": 100,
        "max_number_logs": 100,
        "max_total_log_length": 16384,
        "max_total_prepaid_gas": 300000000000000,
        "max_actions_per_receipt": 100,
        "max_number_bytes_method_names": 2000,
        "max_length_method_name": 256,
        "max_arguments_length": 4194304,
        "max_length_returned_data": 4194304,
        "max_contract_size": 4194304,
        "max_transaction_size": 4194304,
        "max_length_storage_key": 4194304,
        "max_length_storage_value": 4194304,
        "max_promises_per_function_call_action": 1024,
        "max_number_input_data_dependencies": 128,
        "max_functions_number_per_contract": 10000
      }
    },
    "account_creation_config": {
      "min_allowed_top_level_account_length": 32,
      "registrar_account_id": "registrar"
    }
  },
  "transaction_validity_period": 86400,
  "protocol_reward_rate": [
    1,
    10
  ],
  "max_inflation_rate": [
    1,
    20
  ],
  "num_blocks_per_year": 31536000,
  "protocol_treasury_account": "near",
  "fishermen_threshold": "340282366920938463463374607431768211455",
  "minimum_stake_divisor": 10
}

好像storage_amount_per_byte就在下面runtime_config正如预期的那样。

结论

不确定你的代码发生了什么，但这似乎对我来说效果很好