#!/bin/bash

set -ex

mkdir -p $HOME/.bitcoin

if [ -f "$HOME/.bitcoin/bitcoin.conf" ];
then
  echo "Backing up bitcoin.conf"
  TMPEXT=$(date +%Y.%m.%d.%H.%M.%S)
  mv $HOME/.bitcoin/bitcoin.conf $HOME/.bitcoin/bitcoin.conf.bak.$TMPEXT
fi

echo "Creating bitcoin.conf"

# Seed a random password for JSON RPC server
cat <<EOF > $HOME/.bitcoin/bitcoin.conf
#
# Do not modify this file as it is autogenerated. 
# You can either:
#   (a) Modify this template "btc_init" in build or
#   (b) You can pass a variable name as env variable during container launch
#
# Environmental Variable Name List
#
# MAINNET
# TESTNET
# REGTEST
# SERVER
# LISTEN
# LISTENONION
# DAEMON
# TXINDEX
# PRUNE
# DISABLEWALLET
# PRINTCONSOLE
# RPCUSER
# RPCPASSWORD
# RPCCONNECT
# RPCPORT
# RPCAUTH
# DBCACHE
# MAXCONNECTIONS
# MAXUPLOADTARGET
# PROXY
# SEEDNODE1
# SEEDNODE2
# SEEDNODE3
# REINDEXCHAINSTATE

# network
mainnet=${MAINNET:-1}             
testnet=${TESTNET:-0}             
regtest=${REGTEST:-0}             

# server
server=${SERVER:-1}               
listen=${LISTEN:-1}               
listenonion=${LISTENONION:-0}     
daemon=${DAEMON:-0}               
txindex=${TXINDEX:-1}             
prune=${PRUNE=-0}                 
disablewallet=${DISABLEWALLET:-1} 
printtoconsole=${PRINTTOCONSOLE:-1} 

# rpc
rpcuser=${RPCUSER:-bitcoinrpc}    
rpcpassword=${RPCPASSWORD:-`dd if=/dev/urandom bs=33 count=1 2>/dev/null | base64`} 
#rpcconnect=${RPCCONNECT:-127.0.0.1} 
#rpcport=${RPCPORT:-8332}         
#rpcauth=${RPCAUTH:-xxx}          

# performance
dbcache=${DBCACHE:-2000}          
maxconnections=${MAXCONNECTIONS:-40} 
maxuploadtarget=${MAXUPLOADTARGET:-5000} 

# tor
#proxy=${PROXY:-127.0.0.1:9050}   
#seednode=${SEEDNODE1:-nkf5e6b7pl4jfd4a.onion} 
#seednode=${SEEDNODE2:-xqzfakpeuvrobvpj.onion} 
#seednode=${SEEDNODE3:-tsyvzsqwa2kkf6b2.onion} 

# validation
reindex-chainstate=${REINDEXCHAINSTATE:-0} 

EOF

cat $HOME/.bitcoin/bitcoin.conf

echo "Initialization completed successfully"