43 lines
1.1 KiB
Markdown
43 lines
1.1 KiB
Markdown
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---
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title: Whisper JavaScript example
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---
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[This link](https://github.com/gballet/whisper-chat-example) contains a full-fledged example of how to use Whisper in a small chat application.
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Let's now have a look at the `sendMessage` function:
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```javascript
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sendMessage() {
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// Start by declaring the message, we picked a JSON format with
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// `text` as the content and `name` as the name of the user who
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// is sending the message.
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let msg = {
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text: this.text,
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name: this.name
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};
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// (code elided for clarity)
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// Create the data object that will be sent to the RPC endpoint.
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let postData = {
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ttl: 7,
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topic: '0x07678231',
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powTarget: 2.01,
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powTime: 100,
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payload: encodeToHex(JSON.stringify(msg)),
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};
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// Set the appropriate key id.
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if (this.asym) {
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postData.pubKey = this.recipientPubKey;
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postData.sig = this.asymKeyId;
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} else
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postData.symKeyID = this.symKeyId;
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// Perform the RPC call that will tell the node to forward
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// that message to all its neighboring nodes.
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this.shh.post(postData);
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// (code elided for clarity)
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}
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```
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