def set_market_fee(self, percentage_fee, max_market_fee):
""" Set trading percentage fee
:param float percentage_fee: Percentage of fee
:param HLD.amount.Amount max_market_fee: Max Fee
"""
assert percentage_fee <= 100 and percentage_fee > 0
flags = {"charge_market_fee": percentage_fee > 0}
options = self["options"]
test_permissions(options["issuer_permissions"], flags)
flags_int = force_flag(options["flags"], flags)
options.update({
"flags": flags_int,
"market_fee_percent": percentage_fee * 100,
"max_market_fee": int(max_market_fee),
})
op = operations.Asset_update(
**{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"issuer": self["issuer"],
"asset_to_update": self["id"],
"new_options": options,
"extensions": []
})
return self.HLD.finalizeOp(op, self["issuer"], "active")
def halt(self):
""" Halt this asset from being moved or traded
"""
nullaccount = Account(
"null-account", # We set the null-account
HLD_instance=self.HLD)
flags = {
"white_list": True,
"transfer_restricted": True,
}
options = self["options"]
test_permissions(options["issuer_permissions"], flags)
flags_int = force_flag(options["flags"], flags)
options.update({
"flags": flags_int,
"whitelist_authorities": [nullaccount["id"]],
"blacklist_authorities": [],
"whitelist_markets": [self["id"]],
"blacklist_markets": [],
})
op = operations.Asset_update(
**{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"issuer": self["issuer"],
"asset_to_update": self["id"],
"new_options": options,
"extensions": []
})
return self.HLD.finalizeOp(op, self["issuer"], "active")
def release(
self,
whitelist_authorities=[],
blacklist_authorities=[],
whitelist_markets=[],
blacklist_markets=[],
):
""" Release this asset and allow unrestricted transfer, trading,
etc.
:param list whitelist_authorities: List of accounts that
serve as whitelist authorities
:param list blacklist_authorities: List of accounts that
serve as blacklist authorities
:param list whitelist_markets: List of assets to allow
trading with
:param list blacklist_markets: List of assets to prevent
trading with
"""
flags = {
"white_list": False,
"transfer_restricted": False,
}
options = self["options"]
test_permissions(options["issuer_permissions"], flags)
flags_int = force_flag(options["flags"], flags)
options.update({
"flags":
flags_int,
"whitelist_authorities":
[Account(a)["id"] for a in whitelist_authorities],
"blacklist_authorities":
[Account(a)["id"] for a in blacklist_authorities],
"whitelist_markets": [Asset(a)["id"] for a in whitelist_markets],
"blacklist_markets": [Asset(a)["id"] for a in blacklist_markets],
})
op = operations.Asset_update(
**{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"issuer": self["issuer"],
"asset_to_update": self["id"],
"new_options": options,
"extensions": []
})
return self.HLD.finalizeOp(op, self["issuer"], "active")
def add_markets(self, type, authorities=[], force_enable=True):
""" Add markets to an assets white/black list
:param str type: ``blacklist`` or ``whitelist``
:param list markets: List of markets (assets)
:param bool force_enable: Force enable ``white_list`` flag
"""
assert type in ["blacklist", "whitelist"]
assert isinstance(authorities, (list, set))
options = self["options"]
if force_enable:
test_permissions(options["issuer_permissions"],
{"white_list": True})
flags_int = force_flag(options["flags"], {"white_list": True})
options.update({"flags": flags_int})
else:
assert test_permissions(
options["flags"],
["white_list"]), "whitelist feature not enabled"
if type == "whitelist":
options["whitelist_markets"].extend(
[Asset(a)["id"] for a in authorities])
if type == "blacklist":
options["blacklist_markets"].extend(
[Asset(a)["id"] for a in authorities])
op = operations.Asset_update(
**{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"issuer": self["issuer"],
"asset_to_update": self["id"],
"new_options": options,
"extensions": []
})
return self.HLD.finalizeOp(op, self["issuer"], "active")
def setoptions(self, flags):
""" Enable a certain flag.
Flags:
* charge_market_fee
* white_list
* override_authority
* transfer_restricted
* disable_force_settle
* global_settle
* disable_confidential
* witness_fed_asset
* committee_fed_asset
:param dict flag: dictionary of flags and boolean
"""
assert set(flags.keys()).issubset(
asset_permissions.keys()), "unknown flag"
options = self["options"]
test_permissions(options["issuer_permissions"], flags)
flags_int = force_flag(options["flags"], flags)
options.update({"flags": flags_int})
op = operations.Asset_update(
**{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"issuer": self["issuer"],
"asset_to_update": self["id"],
"new_options": options,
"extensions": []
})
return self.HLD.finalizeOp(op, self["issuer"], "active")