def _get_asset_symbol(self, asset_id):
    ' get the asset symbol from an asset id\n\n            :@param int asset_id: 0 -> CBD, 1 -> CREA, 2 -> VESTS\n\n        '
    for asset in self.chain_params['chain_assets']:
        if (asset['id'] == asset_id):
            return asset['symbol']
    raise KeyError('asset ID not found in chain assets')
get the asset symbol from an asset id

:@param int asset_id: 0 -> CBD, 1 -> CREA, 2 -> VESTS
def _get_asset_symbol(self, asset_id):
    ' get the asset symbol from an asset id\n\n            :@param int asset_id: 0 -> CBD, 1 -> CREA, 2 -> VESTS\n\n        '
    for asset in self.chain_params['chain_assets']:
        if (asset['id'] == asset_id):
            return asset['symbol']
    raise KeyError('asset ID not found in chain assets')