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chore: adding docs for decrypting messages using c-bindings

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Richard Ramos 2022-05-12 11:29:44 -04:00
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@ -32,7 +32,6 @@ All the API functions return a `JSONResponse` unless specified otherwise. `JSONR
Asynchronous events require a callback to be registered. An example of an asynchronous event that might be emitted is receiving a message. When an event is emitted, this callback will be triggered receiving a json string with the following format:
```js
{
"nodeId": 0, // go-waku node that emitted the signal
"type": "message", // type of signal being emitted. Currently only "message" is available
"event": ... // format depends on the type of signal. In the case of "message", a waku message can be expected here
}
@ -324,7 +323,7 @@ Subscribe to a WakuRelay topic to receive messages.
**Returns**
`JSONResponse` with a subscription ID. An `error` message otherwise
`JSONResponse` with a null result. An `error` message otherwise
**Events**
When a message is received, a ``"message"` event` is emitted containing the message, and pubsub topic in which the message was received. Here's an example event that could be received:
@ -481,28 +480,64 @@ Query historic messages using waku store protocol.
}
```
## Decrypting messages
### `extern char* waku_decode_symmetric(char* messageJSON, char* symmetricKey)`
Decrypt a message using a symmetric key
**Parameters**
1. `char* messageJSON`: json string containing the [Waku Message](https://rfc.vac.dev/spec/14/)
```js
{
"payload":"...", // encrypted payload encoded in base64.
"contentTopic: "...",
"version": 1,
"timestamp": 1647963508000000000 // Unix timestamp in nanoseconds
}
```
2. `char* symmetricKey`: 32 byte symmetric key
**Returns**
`JSONResponse` containing a `DecodedPayload`. An `error` message otherwise
```js
{
"result": {
"pubkey": "0x......", // pubkey that signed the message (optional)
"signature": "0x....", // message signature (optional)
"data": "...", // decrypted message payload encoded in base64
"padding": "...", // base64 encoded padding
}
}
```
### `extern char* waku_decode_asymmetric(char* messageJSON, char* privateKey)`
Decrypt a message using a secp256k1 private key
**Parameters**
1. `char* messageJSON`: json string containing the [Waku Message](https://rfc.vac.dev/spec/14/)
```js
{
"payload":"...", // encrypted payload encoded in base64.
"contentTopic: "...",
"version": 1,
"timestamp": 1647963508000000000 // Unix timestamp in nanoseconds
}
```
2. `char* privateKey`: secp256k1 private key
**Returns**
`JSONResponse` containing a `DecodedPayload`. An `error` message otherwise
```js
{
"result": {
"pubkey": "0x......", // pubkey that signed the message (optional)
"signature": "0x....", // message signature (optional)
"data": "...", // decrypted message payload encoded in base64
"padding": "...", // base64 encoded padding
}
}
```
## Waku Message Utils