# This is an automatically generated file.
# DO NOT EDIT or your changes may be overwritten
from __future__ import annotations
import base64
import json
from typing import Optional
from xdrlib3 import Packer, Unpacker
from .base import DEFAULT_XDR_MAX_DEPTH
from .precondition_type import PreconditionType
from .preconditions_v2 import PreconditionsV2
from .time_bounds import TimeBounds
__all__ = ["Preconditions"]
[docs]
class Preconditions:
"""
XDR Source Code::
union Preconditions switch (PreconditionType type)
{
case PRECOND_NONE:
void;
case PRECOND_TIME:
TimeBounds timeBounds;
case PRECOND_V2:
PreconditionsV2 v2;
};
"""
def __init__(
self,
type: PreconditionType,
time_bounds: Optional[TimeBounds] = None,
v2: Optional[PreconditionsV2] = None,
) -> None:
self.type = type
self.time_bounds = time_bounds
self.v2 = v2
def pack(self, packer: Packer) -> None:
self.type.pack(packer)
if self.type == PreconditionType.PRECOND_NONE:
return
if self.type == PreconditionType.PRECOND_TIME:
if self.time_bounds is None:
raise ValueError("time_bounds should not be None.")
self.time_bounds.pack(packer)
return
if self.type == PreconditionType.PRECOND_V2:
if self.v2 is None:
raise ValueError("v2 should not be None.")
self.v2.pack(packer)
return
raise ValueError("Invalid type.")
@classmethod
def unpack(
cls, unpacker: Unpacker, depth_limit: int = DEFAULT_XDR_MAX_DEPTH
) -> Preconditions:
if depth_limit <= 0:
raise ValueError("Maximum decoding depth reached")
type = PreconditionType.unpack(unpacker)
if type == PreconditionType.PRECOND_NONE:
return cls(type=type)
if type == PreconditionType.PRECOND_TIME:
time_bounds = TimeBounds.unpack(unpacker, depth_limit - 1)
return cls(type=type, time_bounds=time_bounds)
if type == PreconditionType.PRECOND_V2:
v2 = PreconditionsV2.unpack(unpacker, depth_limit - 1)
return cls(type=type, v2=v2)
raise ValueError("Invalid type.")
def to_xdr_bytes(self) -> bytes:
packer = Packer()
self.pack(packer)
return packer.get_buffer()
@classmethod
def from_xdr_bytes(cls, xdr: bytes) -> Preconditions:
unpacker = Unpacker(xdr)
result = cls.unpack(unpacker)
remaining = len(xdr) - unpacker.get_position()
if remaining != 0:
raise ValueError(f"Unexpected trailing {remaining} bytes in XDR data")
return result
def to_xdr(self) -> str:
xdr_bytes = self.to_xdr_bytes()
return base64.b64encode(xdr_bytes).decode()
@classmethod
def from_xdr(cls, xdr: str) -> Preconditions:
xdr_bytes = base64.b64decode(xdr.encode())
return cls.from_xdr_bytes(xdr_bytes)
def to_json(self) -> str:
return json.dumps(self.to_json_dict())
@classmethod
def from_json(cls, json_str: str) -> Preconditions:
return cls.from_json_dict(json.loads(json_str))
def to_json_dict(self):
if self.type == PreconditionType.PRECOND_NONE:
return "none"
if self.type == PreconditionType.PRECOND_TIME:
assert self.time_bounds is not None
return {"time": self.time_bounds.to_json_dict()}
if self.type == PreconditionType.PRECOND_V2:
assert self.v2 is not None
return {"v2": self.v2.to_json_dict()}
raise ValueError(f"Unknown type in Preconditions: {self.type}")
@classmethod
def from_json_dict(cls, json_value: str | dict) -> Preconditions:
if isinstance(json_value, str):
if json_value not in ("none",):
raise ValueError(
f"Unexpected string '{json_value}' for Preconditions, must be one of: none"
)
type = PreconditionType.from_json_dict(json_value)
return cls(type=type)
if not isinstance(json_value, dict) or len(json_value) != 1:
raise ValueError(
f"Expected a single-key object for Preconditions, got: {json_value}"
)
key = next(iter(json_value))
type = PreconditionType.from_json_dict(key)
if key == "time":
time_bounds = TimeBounds.from_json_dict(json_value["time"])
return cls(type=type, time_bounds=time_bounds)
if key == "v2":
v2 = PreconditionsV2.from_json_dict(json_value["v2"])
return cls(type=type, v2=v2)
raise ValueError(f"Unknown key '{key}' for Preconditions")
def __hash__(self):
return hash(
(
self.type,
self.time_bounds,
self.v2,
)
)
def __eq__(self, other: object):
if not isinstance(other, self.__class__):
return NotImplemented
return (
self.type == other.type
and self.time_bounds == other.time_bounds
and self.v2 == other.v2
)
def __repr__(self):
out = []
out.append(f"type={self.type}")
if self.time_bounds is not None:
out.append(f"time_bounds={self.time_bounds}")
if self.v2 is not None:
out.append(f"v2={self.v2}")
return f"<Preconditions [{', '.join(out)}]>"