1  #!/usr/bin/env bash
 2  
 3  # exit from script if error was raised.
 4  set -e
 5  
 6  # error function is used within a bash function in order to send the error
 7  # message directly to the stderr output and exit.
 8  error() {
 9      echo "$1" > /dev/stderr
10      exit 0
11  }
12  
13  # return is used within the bash function in order to return the value.
14  return() {
15      echo "$1"
16  }
17  
18  # set_default function gives the ability to move the setting of default
19  # env variable from docker file to the script thereby giving the ability to the
20  # user to override it during container start.
21  set_default() {
22      # docker initialized env variables with blank string and we can't just
23      # use -z flag as usually.
24      BLANK_STRING='""'
25  
26      VARIABLE="$1"
27      DEFAULT="$2"
28  
29      if [[ -z "$VARIABLE" || "$VARIABLE" == "$BLANK_STRING" ]]; then
30  
31          if [ -z "$DEFAULT" ]; then
32              error "You should specify default variable"
33          else
34              VARIABLE="$DEFAULT"
35          fi
36      fi
37  
38     return "$VARIABLE"
39  }
40  
41  # Set default variables if needed.
42  
43  # This password is for testing and it is equivalent to `devpass`.
44  # It is generated from (Note: It is fully deterministic, yet the random salt
45  # generated by the script ensures that the resulting hash is always unique.):
46  # https://github.com/bitcoin/bitcoin/blob/master/share/rpcauth/rpcauth.py
47  DEFAULT_PASSWORD='22d3dd348a42d7f040487887b0ea6cc7$79ce831819539c78537884f85b65a09e15b079d79eb8f99447ea9b0a58fa66a6'
48  
49  RPCAUTH=$(set_default "$RPCAUTH" "devuser:$DEFAULT_PASSWORD")
50  NETWORK=$(set_default "$NETWORK" "regtest")
51  DEBUG=$(set_default "$BITCOIND_DEBUG" "1")
52  
53  PARAMS=""
54  if [ "$NETWORK" != "mainnet" ]; then
55     PARAMS="-$NETWORK"
56  fi
57  
58  PARAMS=$(echo $PARAMS \
59      "-debug"="$DEBUG" \
60      "-rpcauth"="$RPCAUTH" \
61      "-datadir"="/data" \
62      "-debuglogfile"="/data/debug.log" \
63      "-rpcbind"="0.0.0.0" \
64      "-rpcallowip"="0.0.0.0/0" \
65      "-zmqpubrawblock"="tcp://0.0.0.0:28332" \
66      "-zmqpubrawtx"="tcp://0.0.0.0:28333" \
67      "-txindex"
68  )
69  
70  # Add user parameters to the command.
71  PARAMS="$PARAMS $@"
72  
73  # Print command and start bitcoin node.
74  echo "Command: bitcoind $PARAMS"
75  exec bitcoind $PARAMS