Update README.md (#1922)

Developed furhter the "Testnet" section to make it clearer for the complete newbies.
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JayDeLux 2021-01-10 21:25:40 +01:00 committed by rootzoll
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@ -535,9 +535,22 @@ Keysend is a feature of LND that allows your node to accept payments without cre
##### Testnet
You can switch from the mainnet to testnet blockchain if you want to try things out and play with free test coins.
It is very convenient to learn and test to play around in a "sandbox" environment. RaspiBlitz allows this though the "Testnet" setting.
You can freely switch from prod environemt (running on BITCOIN MAINNET) to test environment (running on BITCOIN TESTNET) and back using this setting.
The state of your environments is restored everytime you switch (blockchain, wallets, channels) which is very convenient and safe.
Note however that switching from one environment to the other requires an auto resynchronisation with the corresponding blockchain (MAINNET or TESTNET) and can take some time (e.x. If you switch for the first time to "Testnet" the initial sync of the TESTNET blockchain may take several hours; also if you switch back and forth environment the corresponding blockchain must catchup from where it has been left before switching environment.
Please beware that this might take some time to sync the test blockchain and you need to setup a new lnd testnet wallet during the process.
Of course it would be much more fun and less scary if everyone could afford to own 2 distinct RaspiBlitz, one for each environment, this way your production RaspiBlitz remains online all the time and you can recklessly play around on the other one.
Once in "TESTNET" environment go ahead! Get hold of some Bitcoin Testnet Faucets (these are worthless bitcoins for the testnet) and start playing around with them!
You can get Bitcoin Testnet Faucets at different places on the internet, here are a few links:
https://coinfaucet.eu/en/btc-testnet/
https://testnet-faucet.mempool.co/
https://kuttler.eu/en/bitcoin/btc/faucet/
https://faucet.lightning.community/
You can read more about TESTNET and Bitcoin Faucets here: https://kuttler.eu/code/bitcoin-testnet-blockchain-size-in-2020/
Have fun.
##### LND Auto-Unlock