在 Cosmos 上构建非常简单：你可以通过一条命令启动一条链。本快速开始将在几分钟内带你从零开始，完成链的启动、交易提交以及结果查询。 exampled 是一条简单的 Cosmos SDK 链，用来展示一个可运行应用链的核心组成部分。它包含账户、银行、质押、分配、惩罚、治理等基础构建模块，以及一个自定义的 x/counter 模块。在接下来的教程中，你将先亲手构建该模块的简化版本，然后再逐步了解完整实现。
继续之前，请确保你已完成前置条件中的步骤，以便完成环境配置。

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安装二进制文件

运行以下命令以编译 exampled 二进制文件，并将其放到你的 $PATH 中。 
make install
运行以下命令验证是否安装成功： 
exampled version
你也可以运行以下命令查看所有可用的节点 CLI 命令： 
exampled

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启动链

运行以下命令启动一条单节点本地链。该命令会自动完成所有设置：初始化链数据、创建测试账户并启动节点。请让它在这个终端中持续运行。 
make start

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查询计数器

打开第二个终端并查询当前计数： 
exampled query counter count
你应该会看到如下输出，这表示计数器的初始值为 0： 
{}
你也可以查询该模块的参数： 
exampled query counter params
这表明用于递增计数器的费用被存储为模块参数。exampled 链的基础代币面额是 stake。 
params:
  add_cost:
    - amount: "100"
      denom: stake
  max_add_value: "100"

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提交一笔 Add 交易

发送一笔 Add 交易来递增计数器。该操作会从你用来发送交易、已预先注资的 alice 账户中扣除手续费： 
exampled tx counter add 5 --from alice --chain-id demo --yes

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再次查询计数器

提交交易后，再次查询计数器以查看更新后的模块状态： 
exampled query counter count
你应该会看到如下结果： 
count: "5"
恭喜！你刚刚完成了区块链运行、交易提交以及模块状态查询。

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下一步

在接下来的教程中，你将：
  1. 从零开始构建该模块的最小版本，以理解核心模式
  2. 逐步了解完整的 x/counter 模块示例，看看它额外加入了什么
  3. 了解模块如何接入链中，以及如何运行完整测试套件
下一步：从零开始构建模块 →
Building on Cosmos is simple: you can start a chain with a single command. This quickstart gets you from zero to a running chain, a submitted transaction, and a queried result in minutes. exampled is a simple Cosmos SDK chain that shows the core pieces of a working app chain. It includes the basic building-block modules for accounts, bank, staking, distribution, slashing, governance, and more, plus a custom x/counter module. In the next tutorials, you’ll build a simple version of that module yourself and then walk through the full implementation.
Before continuing, make sure you have completed the Prerequisites to get your environment set up.

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Install the binary

Run the following to compile the exampled binary and place it on your $PATH. 
make install
Verify the install by running: 
exampled version
You can also run the following to see all available node CLI commands: 
exampled

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Start the chain

Run the following to start a single-node local chain. It handles all setup automatically: initializes the chain data, creates test accounts, and starts the node. Leave it running in this terminal. 
make start

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Query the counter

Open a second terminal and query the current count: 
exampled query counter count
You should see the following output, which means the counter is starting at 0: 
{}
You can also query the module parameters: 
exampled query counter params
This shows that the fee to increment the counter is stored as a module parameter. The base coin denomination for the exampled chain is stake. 
params:
  add_cost:
    - amount: "100"
      denom: stake
  max_add_value: "100"

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Submit an add transaction

Send an Add transaction to increment the counter. This charges a fee from the funded alice account you are sending the transaction from: 
exampled tx counter add 5 --from alice --chain-id demo --yes

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Query the counter again

After submitting the transaction, query the counter again to see the updated module state: 
exampled query counter count
You should see the following: 
count: "5"
Congratulations! You just ran a blockchain, submitted a transaction, and queried module state.

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Next steps

In the following tutorials, you will:
  1. Build a minimal version of this module from scratch to understand the core pattern
  2. Walk through the full x/counter module example to see what it adds
  3. See how modules are wired into a chain and how to run the full test suite
Next: Build a Module from Scratch →