chore: add how to test miner on dev chain doc

README.md

@@ -70,5 +70,6 @@ Mainnet Mirana or Testnet Pudge, switch to the branch [master].
 - [Platform Support](docs/platform-support.md)
 - [How to Download or Build CKB Binary](https://docs.nervos.org/docs/basics/guides/get-ckb)
 - [How to Download or Build CKB Binary on Windows](https://docs.nervos.org/docs/basics/guides/ckb-on-windows)
+- [How to test miner on dev chain](docs/dev-miner.md)
 
 You can find a more comprehensive document website at [https://docs.nervos.org](https://docs.nervos.org).

docs/dev-miner.md

@@ -0,0 +1,66 @@
+# How to test miner on dev chain
+
+`dev` chain is a local chain for development, its pow algorithm is `Dummy`, which is not a real pow algorithm, it just mines a block in a fixed or random time interval. If you want to test your miner or mining pool related features, you may change the pow algorithm to `Eaglesong` and use dev chain to test. The following steps will show you how to do it.
+
+## Initialize a dev chain
+
+First, you need to prepare one public/private keypair, then initialize a dev chain by passing the public key hash to `--ba-arg` option:
+
+```shell
+mkdir ckb-dev-miner-test
+cd ckb-dev-miner-test
+ckb init --chain dev --ba-arg 0x470dcdc5e44064909650113a274b3b36aecb6dc7
+```
+
+## Modify the config file
+
+Then you need to modify the config file `specs/dev.toml`, change the option `func` under the section `[pow]` from `Dummy` to `Eaglesong`:
+
+```diff
+- func = "Dummy"
++ func = "Eaglesong"
+```
+
+## Start the ckb node
+
+Start the ckb node:
+
+```shell
+ckb run
+```
+
+You will see the node is listening on the default rpc port `8114` by checking the log output:
+
+```
+main INFO ckb_rpc::server  Listen HTTP RPCServer on address: 127.0.0.1:8114
+```
+
+## Verify the setup
+
+ckb provides a built-in miner which can be used to verify the setup, you need to modify the section `[[miner.workers]]` of config file `ckb-miner.toml`:
+
+```diff
+- worker_type = "Dummy"
+- delay_type = "Constant"
+- value = 9500
++ worker_type = "EaglesongSimple"
++ threads = 1
+```
+
+then start the miner (please note that you need to start the miner in another terminal):
+
+```shell
+ckb miner
+```
+
+if you see the following similar output, it means the setup is correct:
+
+```
+Found! #38 0xb7c7a93578e72316ad35db9131822e9dc52745ad511673b521150cf10ccb2280
+Found! #39 0x0c78d91f877764e90e88f11dede4b6e70933bb70d87ef3b14fb42291833ddb86
+Found! #40 0xc37b8c375f9ec4b671dc8a553791630d2ffc7a0a4a3fe7d6195121754b08c458
+Found! #41 0x43768c4a1a8b723f6b4a23426fda14c044ecc501d56bc2f18fef50829d8e132b
+...
+```
+
+Now you can stop the miner process and start your own miner or mining pool to test your features.