Adding simnet instructions to docs/

Author: karliatto

README.md

@@ -39,4 +39,6 @@ If you want Prettier to help you by applying changes on save you have to change
 
 ### LND
 
-We are using the [LND](https://github.com/lightningnetwork/lnd) REST [API](https://app.swaggerhub.com/apis/lnd-rest/rpc-proto/master)
+We are using the [LND](https://github.com/lightningnetwork/lnd) REST [API](https://app.swaggerhub.com/apis/lnd-rest/rpc-proto/master).
+
+You can run your LND simnet following the instructions in the [docs](https://github.com/Learn-by-doing/lightning-extension/tree/master/docs) direcotry.

docs/simnet.md

@@ -0,0 +1,107 @@
+# Run you LND with btcd simnet
+
+Simnet is a development/test network run locally that allows us to generate blocks at will, so we can avoid the time-consuming process of waiting for blocks to arrive for any on-chain functionality.
+
+## Install GO and LND
+
+In order to work with [`lnd`](https://github.com/lightningnetwork/lnd), the following build dependencies are required:
+
+- **Go:** `lnd` and `btcd` are written in Go. To install, run one of the following commands:
+
+  ```
+  sudo apt-get install golang-1.11-go
+  ```
+
+  And adding the environment variables to your user's .profile::
+
+  ```
+  export PATH=$PATH:/usr/local/go/bin
+  export PATH=$PATH:$(go env GOPATH)/bin
+  export GOPATH=$(go env GOPATH)
+  ```
+
+- [`btcd`](https://github.com/btcsuite/btcd)
+  Run the following commands to obtain btcd, all dependencies, and install it:
+
+  ```bash
+  go get -u github.com/Masterminds/glide
+  git clone https://github.com/btcsuite/btcd $GOPATH/src/github.com/btcsuite/btcd
+  cd $GOPATH/src/github.com/btcsuite/btcd
+  glide install
+  go install . ./cmd/...
+  ```
+
+- [`lnd`](https://github.com/lightningnetwork/lnd)
+  Run the following commands to obtain and install lnd:
+
+  ```
+  go get -d github.com/lightningnetwork/lnd
+  cd $GOPATH/src/github.com/lightningnetwork/lnd
+  make && make install
+  ```
+
+Once you have `lnd` and `btcd` you can continue:
+
+## Running simnet
+
+```
+btcd --simnet --txindex --rpcuser=kek --rpcpass=kek
+```
+
+## Run LND
+
+```bash
+lnd --restlisten=localhost:8001 --datadir=~/.lnd/data --logdir=~/.lnd/log --debuglevel=info --bitcoin.simnet --bitcoin.active --bitcoin.node=btcd --btcd.rpcuser=kek --btcd.rpcpass=kek
+```
+
+## Test if it works:
+
+```bash
+lncli --macaroonpath=~/.lnd/data/chain/bitcoin/simnet/admin.macaroon getinfo
+```
+
+## Use the REST API
+
+```bash
+curl --insecure --header "Grpc-Metadata-macaroon: $(xxd -ps -u -c 1000  ~/.lnd/data/chain/bitcoin/simnet/admin.macaroon)" https://localhost:8001/v1/getinfo
+```
+
+## How to get founds in your lnd wallet
+
+- Get an address from your lnd wallet
+
+```
+lncli --macaroonpath=~/.lnd/data/chain/bitcoin/simnet/admin.macaroon newaddress np2wkh
+```
+
+It gives you an output like: `rd6y7jJVPHGUBxbGjXer8W4ycQgVNbFHPb`
+
+## Assign the new created address as your mining address in btcd
+
+```
+btcd --simnet --txindex --rpcuser=kek --rpcpass=kek --miningaddr=NEW_ADDRESS
+```
+
+## Generate bloks using btcctl cli
+
+```
+btcctl --simnet --rpcuser=kek --rpcpass=kek generate 100
+```
+
+## Check your balance
+
+Now you should have founds in your lnd wallet, test it with the command bellow:
+
+```
+lncli --macaroonpath=~/.lnd/data/chain/bitcoin/simnet/admin.macaroon walletbalance
+```
+
+It should output:
+
+```
+{
+  "total_balance": "5000000000",
+  "confirmed_balance": "5000000000",
+  "unconfirmed_balance": "0"
+}
+```