mirror of https://github.com/hyperledger/besu
An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client https://wiki.hyperledger.org/display/besu
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
3.5 KiB
93 lines
3.5 KiB
description: How to access the Pantheon API using JSON-RPC
|
|
<!--- END of page meta data -->
|
|
|
|
# JSON-RPC over HTTP and WebSockets
|
|
|
|
To enable JSON-RPC over HTTP or WebSockets, use the [`--rpc-http-enabled`](../Reference/Pantheon-CLI-Syntax.md#rpc-http-enabled)
|
|
and [`--rpc-ws-enabled`](../Reference/Pantheon-CLI-Syntax.md#rpc-ws-enabled) options.
|
|
|
|
## Postman
|
|
|
|
Use the button to import our collection of examples to [Postman](https://www.getpostman.com/).
|
|
|
|
[](https://app.getpostman.com/run-collection/c765d7d22b055c42a510)
|
|
|
|
|
|
## Geth Console
|
|
|
|
The geth console is a REPL (Read, Evaluate, & Print Loop) Javascript console. Use JSON-RPC APIs supported by geth and
|
|
Pantheon directly in the console.
|
|
|
|
To use the geth console with Pantheon:
|
|
|
|
1. Start Pantheon with the [`--rpc-http-enabled`](../Reference/Pantheon-CLI-Syntax.md#rpc-http-enabled) option.
|
|
|
|
1. Specify which APIs to enable using the [`--rpc-http-api`](../Reference/Pantheon-CLI-Syntax.md#rpc-http-api) option.
|
|
|
|
1. Start the geth console specifying the JSON-RPC endpoint:
|
|
```bash
|
|
geth attach http://localhost:8545
|
|
```
|
|
|
|
Use the geth console to call [JSON-RPC API methods](../Reference/Pantheon-API-Methods.md) that geth and Pantheon share.
|
|
|
|
!!! example
|
|
```bash
|
|
eth.syncing
|
|
```
|
|
|
|
## JSON-RPC Authentication
|
|
|
|
[Authentication](Authentication.md) is disabled by default.
|
|
|
|
## HTTP and WebSocket Requests
|
|
|
|
### HTTP
|
|
|
|
To make RPC requests over HTTP, you can use [`curl`](https://curl.haxx.se/download.html).
|
|
|
|
```bash
|
|
curl -X POST --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":53}' <JSON-RPC-http-endpoint:port>
|
|
```
|
|
|
|
### WebSockets
|
|
|
|
To make RPC requests over WebSockets, you can use [wscat](https://github.com/websockets/wscat), a Node.js based command-line tool.
|
|
|
|
First connect to the WebSockets server using `wscat` (you only need to connect once per session):
|
|
|
|
```bash
|
|
wscat -c ws://<JSON-RPC-ws-endpoint:port>
|
|
```
|
|
|
|
After the connection is established, the terminal displays a '>' prompt.
|
|
Send individual requests as a JSON data package at each prompt:
|
|
|
|
```bash
|
|
{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":53}
|
|
```
|
|
|
|
!!! note
|
|
`wscat` does not support headers. [Authentication](Authentication.md) requires an authentication token to be passed in the
|
|
request header. To use authentication with WebSockets, an app that supports headers is required.
|
|
|
|
### API Methods Enabled by Default
|
|
|
|
The `ETH`, `NET`, and `WEB3` API methods are enabled by default.
|
|
|
|
Use the [`--rpc-http-api`](../Reference/Pantheon-CLI-Syntax.md#rpc-http-api) or [`--rpc-ws-api`](../Reference/Pantheon-CLI-Syntax.md#rpc-ws-api)
|
|
options to enable the `ADMIN`, `CLIQUE`, `DEBUG`, `EEA`, `IBFT`, `MINER`, `PERM`, and `TXPOOL` API methods.
|
|
|
|
## Block Parameter
|
|
|
|
When you make requests that might have different results depending on the block accessed,
|
|
the block parameter specifies the block.
|
|
Several methods, such as [eth_getTransactionByBlockNumberAndIndex](../Reference/Pantheon-API-Methods.md#eth_gettransactionbyblocknumberandindex), have a block parameter.
|
|
|
|
The block parameter can have the following values:
|
|
|
|
* `blockNumber` : `quantity` - Block number. Can be specified in hexadecimal or decimal. 0 represents the genesis block.
|
|
* `earliest` : `tag` - Earliest (genesis) block.
|
|
* `latest` : `tag` - Last block mined.
|
|
* `pending` : `tag` - Last block mined plus pending transactions. Use only with [eth_getTransactionCount](../Reference/Pantheon-API-Methods.md#eth_gettransactioncount).
|
|
|
|
|