old_contents: from django import template
  from bitcoins.utils import satoshis_to_btc
  
  from blockcypher import COIN_SYMBOL_MAPPINGS, get_websocket_address
  
  
  register = template.Library()
  
  
  @register.filter(name='satoshis_to_btc_rounded')
  def satoshis_to_btc_rounded(satoshis):
      return satoshis_to_btc(satoshis=satoshis, decimals=4)
  
  
  @register.filter(name='coin_symbol_to_display_name')
  def coin_symbol_to_display_name(coin_symbol):
      return COIN_SYMBOL_MAPPINGS[coin_symbol][0]
  
  
  @register.filter(name='coin_symbol_to_currency_name')
  def coin_symbol_to_currency_name(coin_symbol):
      return COIN_SYMBOL_MAPPINGS[coin_symbol][3]
  
  
  @register.filter(name='coin_symbol_to_wss')
  def coin_symbol_to_wss(coin_symbol):
      return get_websocket_address(coin_symbol)
  
new_contents: from django import template
  from bitcoins.utils import satoshis_to_btc
  
  from blockcypher import COIN_SYMBOL_MAPPINGS, get_websocket_address
  
  
  register = template.Library()
  
  
  @register.filter(name='satoshis_to_btc_rounded')
  def satoshis_to_btc_rounded(satoshis):
      return satoshis_to_btc(satoshis=satoshis, decimals=4)
  
  
  @register.filter(name='coin_symbol_to_display_name')
  def coin_symbol_to_display_name(coin_symbol):
      return COIN_SYMBOL_MAPPINGS[coin_symbol]['display_name']
  
  
  @register.filter(name='coin_symbol_to_currency_name')
  def coin_symbol_to_currency_name(coin_symbol):
      return COIN_SYMBOL_MAPPINGS[coin_symbol]['currency_abbrev']
  
  
  @register.filter(name='coin_symbol_to_wss')
  def coin_symbol_to_wss(coin_symbol):
      return get_websocket_address(coin_symbol)
  
subject: update to new coin mappings