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README.md

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+# BDContract SDK
+
+BDContract SDK for Node.js and browsers.
+
+## Install
+
+`npm install @bdware/bdcontract-sdk`
+
+```typescript
+import { Client } from '@bdware/bdcontract-sdk'
+import { sm2 } from 'sm-crypto'
+const client = new Client(
+  url,
+  (ev) => {
+    console.log(JSON.stringify(ev))
+  },
+  (ev, ws) => {
+    console.log(ev.data)
+  },
+  sm2.generateKeyPairHex(),
+)
+```
+
+To use with plain HTML and JavaScript, include [dist/bdcontract-sdk.umd.js](dist/bdcontract-sdk.umd.js) (example from [test/index.html](test/index.html)):
+
+```HTML
+<script type="text/javascript" src="./sm2.js"></script>
+<script type="text/javascript" src="./cryptico.iife.js"></script>
+<script type="text/javascript" src="../dist/bdcontract-sdk.iife.js"></script>
+```
+
+## Usage
+
+```javascript
+// Approach 1:
+const wssocket = new WsSocket(url, wsHandler)
+
+// Approach 2:
+function print(string) {
+  document.write(string + '\n\n')
+}
+
+const url = 'ws://021.node.internetapi.cn:21030/SCIDE/SCExecutor'
+
+const client = new bdcontract.Client(
+  url,
+  (ev) => {
+    console.log(JSON.stringify(ev))
+  },
+  (ev, ws) => {
+    console.log(ev.data)
+  },
+)
+setTimeout(async () => {
+  const status = client.status()
+  console.log(status)
+  try {
+    let data = await client.executeContract(
+      'AnnotationExample0608',
+      'main',
+      'abacd',
+    )
+    print(JSON.stringify(data))
+  } catch (data) {
+    print(JSON.stringify(data))
+  }
+}, 1000)
+
+// Wait for session receival
+const session = await client.sessionReceived()
+
+// Login and wait (will wait if session not yet received)
+const success = await client.login()
+
+async function anotherPlace() {
+    // In another place, wait for login to complete
+    const success = await client.Loggedin()
+}()
+```