## Fund Coinos server (via bitcoin-cli)
Bitcoin Regtest Mode allows us to create our own Bitcoin sandbox blockchain for use in testing & development.
In this demo/tutorial we will setup a regtest network along with wallet and some initial bitcoin.
From the coinos-server dir on your localfilesystem (ie- after following the 'Getting Started' section of our [root README])
```bash
docker exec -it bitcoin bash
# get an address
bitcoin-cli -regtest -datadir=/config -rpcwallet=coinosdev getnewaddress
# mine a block to the new address
bitcoin-cli -regtest -datadir=/config generatetoaddress 101 theaddressgneratedabove
# verify you got the reward:
bitcoin-cli -regtest -datadir=/config -conf=./bitcoin.conf -rpcwallet=coinosdev getbalance
> 50.00000000
```
#### Start from scratch
To purge any existing transactions you made and to recreate all wallets including the coinos wallet (coinosdev) do (assuming coinos-server is running):
```bash
docker-compose down
sudo rm -rf config/bitcoin
sudo rm -rf config/lightning
sudo rm -rf config/liquid
cp -rf sampleconfig/bitcoin config
cp -rf sampleconfig/lightning config
cp -rf sampleconfig/liquid config
docker-compose up
# app may crash during re-initalization of blockchains so
# restart it again after a few moments if necessary:
docker-compose restart app
```
#### Creating new (Bitcoin native) wallets
Note the wallet 'coinosdev' is created apart of the initial docker build for our Coinos Bitcoin server.
To create a new wallet (ie- as an alternate or one for yourself) do:
```bash
bitcoin-cli -regtest -datadir=/config -conf=./bitcoin.conf createwallet me
> # new wallet created in /config/regtest/wallets
```
and then specify `-rpcwallet=me` (or wallet name of your choice)
#### further reading
On why to generate 101 blocks and some general info on Regtest Mode:
https://developer.bitcoin.org/examples/testing.html
[root README]:https://github.com/coinos/coinos-server
