436 lines
14 KiB
Python
436 lines
14 KiB
Python
import typing
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import struct
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from lbry.wallet.server.db import DB_PREFIXES
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def length_encoded_name(name: str) -> bytes:
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encoded = name.encode('utf-8')
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return len(encoded).to_bytes(2, byteorder='big') + encoded
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class PrefixRow:
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prefix: bytes
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key_struct: struct.Struct
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value_struct: struct.Struct
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@classmethod
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def pack_key(cls, *args) -> bytes:
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return cls.prefix + cls.key_struct.pack(*args)
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@classmethod
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def pack_value(cls, *args) -> bytes:
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return cls.value_struct.pack(*args)
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@classmethod
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def unpack_key(cls, key: bytes):
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assert key[:1] == cls.prefix
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return cls.key_struct.unpack(key[1:])
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@classmethod
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def unpack_value(cls, data: bytes):
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return cls.value_struct.unpack(data)
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@classmethod
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def unpack_item(cls, key: bytes, value: bytes):
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return cls.unpack_key(key), cls.unpack_value(value)
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class EffectiveAmountKey(typing.NamedTuple):
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name: str
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effective_amount: int
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tx_num: int
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position: int
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class EffectiveAmountValue(typing.NamedTuple):
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claim_hash: bytes
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root_tx_num: int
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root_position: int
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class ClaimToTXOKey(typing.NamedTuple):
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claim_hash: bytes
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tx_num: int
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position: int
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class ClaimToTXOValue(typing.NamedTuple):
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root_tx_num: int
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root_position: int
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amount: int
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name: str
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class TXOToClaimKey(typing.NamedTuple):
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tx_num: int
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position: int
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class TXOToClaimValue(typing.NamedTuple):
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claim_hash: bytes
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name: str
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class ClaimShortIDKey(typing.NamedTuple):
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name: str
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claim_hash: bytes
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root_tx_num: int
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root_position: int
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class ClaimShortIDValue(typing.NamedTuple):
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tx_num: int
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position: int
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class ClaimToChannelKey(typing.NamedTuple):
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claim_hash: bytes
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class ClaimToChannelValue(typing.NamedTuple):
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signing_hash: bytes
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class ChannelToClaimKey(typing.NamedTuple):
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signing_hash: bytes
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name: str
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effective_amount: int
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tx_num: int
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position: int
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class ChannelToClaimValue(typing.NamedTuple):
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claim_hash: bytes
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claims_in_channel: int
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class ClaimToSupportKey(typing.NamedTuple):
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claim_hash: bytes
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tx_num: int
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position: int
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class ClaimToSupportValue(typing.NamedTuple):
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amount: int
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class SupportToClaimKey(typing.NamedTuple):
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tx_num: int
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position: int
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class SupportToClaimValue(typing.NamedTuple):
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claim_hash: bytes
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class ClaimExpirationKey(typing.NamedTuple):
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expiration: int
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tx_num: int
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position: int
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class ClaimExpirationValue(typing.NamedTuple):
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claim_hash: bytes
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name: str
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class EffectiveAmountPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.claim_effective_amount_prefix.value
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key_struct = struct.Struct(b'>QLH')
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value_struct = struct.Struct(b'>20sLH')
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@classmethod
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def pack_key(cls, name: str, effective_amount: int, tx_num: int, position: int):
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return cls.prefix + length_encoded_name(name) + cls.key_struct.pack(
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0xffffffffffffffff - effective_amount, tx_num, position
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)
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@classmethod
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def unpack_key(cls, key: bytes) -> EffectiveAmountKey:
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assert key[:1] == cls.prefix
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name_len = int.from_bytes(key[1:3], byteorder='big')
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name = key[3:3 + name_len].decode()
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ones_comp_effective_amount, tx_num, position = cls.key_struct.unpack(key[3 + name_len:])
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return EffectiveAmountKey(
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name, 0xffffffffffffffff - ones_comp_effective_amount, tx_num, position
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)
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@classmethod
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def unpack_value(cls, data: bytes) -> EffectiveAmountValue:
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return EffectiveAmountValue(*super().unpack_value(data))
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@classmethod
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def pack_value(cls, claim_hash: bytes, root_tx_num: int, root_position: int) -> bytes:
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return super().pack_value(claim_hash, root_tx_num, root_position)
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@classmethod
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def pack_item(cls, name: str, effective_amount: int, tx_num: int, position: int, claim_hash: bytes,
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root_tx_num: int, root_position: int):
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return cls.pack_key(name, effective_amount, tx_num, position), \
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cls.pack_value(claim_hash, root_tx_num, root_position)
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class ClaimToTXOPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.claim_to_txo.value
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key_struct = struct.Struct(b'>20sLH')
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value_struct = struct.Struct(b'>LHQ')
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@classmethod
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def pack_key(cls, claim_hash: bytes, tx_num: int, position: int):
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return super().pack_key(
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claim_hash, 0xffffffff - tx_num, 0xffff - position
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)
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@classmethod
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def unpack_key(cls, key: bytes) -> ClaimToTXOKey:
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assert key[:1] == cls.prefix
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claim_hash, ones_comp_tx_num, ones_comp_position = cls.key_struct.unpack(key[1:])
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return ClaimToTXOKey(
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claim_hash, 0xffffffff - ones_comp_tx_num, 0xffff - ones_comp_position
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)
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@classmethod
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def unpack_value(cls, data: bytes) ->ClaimToTXOValue:
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root_tx_num, root_position, amount = cls.value_struct.unpack(data[:14])
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name_len = int.from_bytes(data[14:16], byteorder='big')
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name = data[16:16 + name_len].decode()
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return ClaimToTXOValue(root_tx_num, root_position, amount, name)
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@classmethod
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def pack_value(cls, root_tx_num: int, root_position: int, amount: int, name: str) -> bytes:
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return cls.value_struct.pack(root_tx_num, root_position, amount) + length_encoded_name(name)
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@classmethod
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def pack_item(cls, claim_hash: bytes, tx_num: int, position: int, root_tx_num: int, root_position: int,
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amount: int, name: str):
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return cls.pack_key(claim_hash, tx_num, position), \
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cls.pack_value(root_tx_num, root_position, amount, name)
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class TXOToClaimPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.txo_to_claim.value
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key_struct = struct.Struct(b'>LH')
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value_struct = struct.Struct(b'>20s')
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@classmethod
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def pack_key(cls, tx_num: int, position: int):
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return super().pack_key(tx_num, position)
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@classmethod
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def unpack_key(cls, key: bytes) -> TXOToClaimKey:
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return TXOToClaimKey(*super().unpack_key(key))
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@classmethod
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def unpack_value(cls, data: bytes) -> TXOToClaimValue:
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claim_hash, = cls.value_struct.unpack(data[:20])
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name_len = int.from_bytes(data[20:22], byteorder='big')
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name = data[22:22 + name_len].decode()
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return TXOToClaimValue(claim_hash, name)
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@classmethod
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def pack_value(cls, claim_hash: bytes, name: str) -> bytes:
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return cls.value_struct.pack(claim_hash) + length_encoded_name(name)
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@classmethod
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def pack_item(cls, tx_num: int, position: int, claim_hash: bytes, name: str):
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return cls.pack_key(tx_num, position), \
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cls.pack_value(claim_hash, name)
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class ClaimShortIDPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.claim_short_id_prefix.value
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key_struct = struct.Struct(b'>20sLH')
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value_struct = struct.Struct(b'>LH')
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@classmethod
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def pack_key(cls, name: str, claim_hash: bytes, root_tx_num: int, root_position: int):
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return cls.prefix + length_encoded_name(name) + cls.key_struct.pack(claim_hash, root_tx_num, root_position)
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@classmethod
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def pack_value(cls, tx_num: int, position: int):
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return super().pack_value(tx_num, position)
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@classmethod
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def unpack_key(cls, key: bytes) -> ClaimShortIDKey:
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assert key[:1] == cls.prefix
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name_len = int.from_bytes(key[1:3], byteorder='big')
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name = key[3:3 + name_len].decode()
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return ClaimShortIDKey(name, *cls.key_struct.unpack(key[3 + name_len:]))
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@classmethod
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def unpack_value(cls, data: bytes) -> ClaimShortIDValue:
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return ClaimShortIDValue(*super().unpack_value(data))
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@classmethod
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def pack_item(cls, name: str, claim_hash: bytes, root_tx_num: int, root_position: int,
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tx_num: int, position: int):
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return cls.pack_key(name, claim_hash, root_tx_num, root_position), \
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cls.pack_value(tx_num, position)
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class ClaimToChannelPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.claim_to_channel.value
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key_struct = struct.Struct(b'>20s')
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value_struct = struct.Struct(b'>20s')
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@classmethod
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def pack_key(cls, claim_hash: bytes):
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return super().pack_key(claim_hash)
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@classmethod
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def pack_value(cls, signing_hash: bytes):
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return super().pack_value(signing_hash)
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@classmethod
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def unpack_key(cls, key: bytes) -> ClaimToChannelKey:
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return ClaimToChannelKey(*super().unpack_key(key))
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@classmethod
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def unpack_value(cls, data: bytes) -> ClaimToChannelValue:
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return ClaimToChannelValue(*super().unpack_value(data))
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@classmethod
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def pack_item(cls, claim_hash: bytes, signing_hash: bytes):
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return cls.pack_key(claim_hash), cls.pack_value(signing_hash)
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class ChannelToClaimPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.channel_to_claim.value
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key_struct = struct.Struct(b'>QLH')
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value_struct = struct.Struct(b'>20sL')
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@classmethod
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def pack_key(cls, signing_hash: bytes, name: str, effective_amount: int, tx_num: int, position: int):
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return cls.prefix + signing_hash + length_encoded_name(name) + cls.key_struct.pack(
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0xffffffffffffffff - effective_amount, tx_num, position
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)
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@classmethod
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def unpack_key(cls, key: bytes) -> ChannelToClaimKey:
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assert key[:1] == cls.prefix
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signing_hash = key[1:21]
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name_len = int.from_bytes(key[21:23], byteorder='big')
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name = key[23:23 + name_len].decode()
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ones_comp_effective_amount, tx_num, position = cls.key_struct.unpack(key[23 + name_len:])
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return ChannelToClaimKey(
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signing_hash, name, 0xffffffffffffffff - ones_comp_effective_amount, tx_num, position
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)
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@classmethod
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def pack_value(cls, claim_hash: bytes, claims_in_channel: int) -> bytes:
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return super().pack_value(claim_hash, claims_in_channel)
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@classmethod
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def unpack_value(cls, data: bytes) -> ChannelToClaimValue:
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return ChannelToClaimValue(*cls.value_struct.unpack(data))
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@classmethod
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def pack_item(cls, signing_hash: bytes, name: str, effective_amount: int, tx_num: int, position: int,
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claim_hash: bytes, claims_in_channel: int):
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return cls.pack_key(signing_hash, name, effective_amount, tx_num, position), \
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cls.pack_value(claim_hash, claims_in_channel)
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class ClaimToSupportPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.claim_to_support.value
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key_struct = struct.Struct(b'>20sLH')
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value_struct = struct.Struct(b'>Q')
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@classmethod
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def pack_key(cls, claim_hash: bytes, tx_num: int, position: int):
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return super().pack_key(claim_hash, tx_num, position)
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@classmethod
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def unpack_key(cls, key: bytes) -> ClaimToSupportKey:
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return ClaimToSupportKey(*super().unpack_key(key))
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@classmethod
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def pack_value(cls, amount: int) -> bytes:
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return super().pack_value(amount)
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@classmethod
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def unpack_value(cls, data: bytes) -> ClaimToSupportValue:
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return ClaimToSupportValue(*super().unpack_value(data))
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@classmethod
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def pack_item(cls, claim_hash: bytes, tx_num: int, position: int, amount: int):
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return cls.pack_key(claim_hash, tx_num, position), \
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cls.pack_value(amount)
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class SupportToClaimPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.support_to_claim.value
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key_struct = struct.Struct(b'>LH')
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value_struct = struct.Struct(b'>20s')
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@classmethod
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def pack_key(cls, tx_num: int, position: int):
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return super().pack_key(tx_num, position)
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@classmethod
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def unpack_key(cls, key: bytes) -> SupportToClaimKey:
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return SupportToClaimKey(*super().unpack_key(key))
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@classmethod
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def pack_value(cls, claim_hash: bytes) -> bytes:
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return super().pack_value(claim_hash)
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@classmethod
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def unpack_value(cls, data: bytes) -> SupportToClaimValue:
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return SupportToClaimValue(*super().unpack_value(data))
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@classmethod
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def pack_item(cls, tx_num: int, position: int, claim_hash: bytes):
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return cls.pack_key(tx_num, position), \
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cls.pack_value(claim_hash)
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class ClaimExpirationPrefixRow(PrefixRow):
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prefix = DB_PREFIXES.claim_expiration.value
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key_struct = struct.Struct(b'>LLH')
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value_struct = struct.Struct(b'>20s')
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@classmethod
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def pack_key(cls, expiration: int, tx_num: int, position: int) -> bytes:
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return super().pack_key(expiration, tx_num, position)
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@classmethod
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def pack_value(cls, claim_hash: bytes, name: str) -> bytes:
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return cls.value_struct.pack(claim_hash) + length_encoded_name(name)
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@classmethod
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def pack_item(cls, expiration: int, tx_num: int, position: int, claim_hash: bytes, name: str) -> typing.Tuple[bytes, bytes]:
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return cls.pack_key(expiration, tx_num, position), cls.pack_value(claim_hash, name)
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@classmethod
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def unpack_key(cls, key: bytes) -> ClaimExpirationKey:
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return ClaimExpirationKey(*super().unpack_key(key))
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@classmethod
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def unpack_value(cls, data: bytes) -> ClaimExpirationValue:
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name_len = int.from_bytes(data[20:22], byteorder='big')
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name = data[22:22 + name_len].decode()
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claim_id, = cls.value_struct.unpack(data[:20])
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return ClaimExpirationValue(claim_id, name)
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@classmethod
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def unpack_item(cls, key: bytes, value: bytes) -> typing.Tuple[ClaimExpirationKey, ClaimExpirationValue]:
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return cls.unpack_key(key), cls.unpack_value(value)
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class Prefixes:
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claim_to_support = ClaimToSupportPrefixRow
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support_to_claim = SupportToClaimPrefixRow
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claim_to_txo = ClaimToTXOPrefixRow
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txo_to_claim = TXOToClaimPrefixRow
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claim_to_channel = ClaimToChannelPrefixRow
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channel_to_claim = ChannelToClaimPrefixRow
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claim_short_id = ClaimShortIDPrefixRow
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claim_effective_amount = EffectiveAmountPrefixRow
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claim_expiration = ClaimExpirationPrefixRow
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# undo_claimtrie = b'M'
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