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jmwallet.backends.offline

jmwallet.backends.offline

Blockchain backend placeholder for wallet operations that require no network access.

Classes

OfflineBackend

Bases: BlockchainBackend

Backend that fails closed if code attempts blockchain access.

Source code in jmwallet/src/jmwallet/backends/offline.py 
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class OfflineBackend(BlockchainBackend):
    """Backend that fails closed if code attempts blockchain access."""

    @staticmethod
    def _unavailable() -> OfflineBackendError:
        return OfflineBackendError("Blockchain access is unavailable in offline mode")

    async def get_utxos(self, addresses: list[str]) -> list[UTXO]:
        raise self._unavailable()

    async def get_address_balance(self, address: str) -> int:
        raise self._unavailable()

    async def broadcast_transaction(self, tx_hex: str) -> str:
        raise self._unavailable()

    async def get_transaction(self, txid: str) -> Transaction | None:
        raise self._unavailable()

    async def estimate_fee(self, target_blocks: int) -> float:
        raise self._unavailable()

    async def get_block_height(self) -> int:
        raise self._unavailable()

    async def get_block_time(self, block_height: int) -> int:
        raise self._unavailable()

    async def get_block_hash(self, block_height: int) -> str:
        raise self._unavailable()

    async def get_utxo(self, txid: str, vout: int) -> UTXO | None:
        raise self._unavailable()

    def can_estimate_fee(self) -> bool:
        return False

    def can_lookup_arbitrary_utxos(self) -> bool:
        return False

    def has_mempool_access(self) -> bool:
        return False
Methods:
broadcast_transaction(tx_hex: str) -> str async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def broadcast_transaction(self, tx_hex: str) -> str:
    raise self._unavailable()
can_estimate_fee() -> bool
Source code in jmwallet/src/jmwallet/backends/offline.py 
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def can_estimate_fee(self) -> bool:
    return False
can_lookup_arbitrary_utxos() -> bool
Source code in jmwallet/src/jmwallet/backends/offline.py 
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def can_lookup_arbitrary_utxos(self) -> bool:
    return False
estimate_fee(target_blocks: int) -> float async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def estimate_fee(self, target_blocks: int) -> float:
    raise self._unavailable()
get_address_balance(address: str) -> int async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_address_balance(self, address: str) -> int:
    raise self._unavailable()
get_block_hash(block_height: int) -> str async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_block_hash(self, block_height: int) -> str:
    raise self._unavailable()
get_block_height() -> int async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_block_height(self) -> int:
    raise self._unavailable()
get_block_time(block_height: int) -> int async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_block_time(self, block_height: int) -> int:
    raise self._unavailable()
get_transaction(txid: str) -> Transaction | None async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_transaction(self, txid: str) -> Transaction | None:
    raise self._unavailable()
get_utxo(txid: str, vout: int) -> UTXO | None async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_utxo(self, txid: str, vout: int) -> UTXO | None:
    raise self._unavailable()
get_utxos(addresses: list[str]) -> list[UTXO] async
Source code in jmwallet/src/jmwallet/backends/offline.py 
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async def get_utxos(self, addresses: list[str]) -> list[UTXO]:
    raise self._unavailable()
has_mempool_access() -> bool
Source code in jmwallet/src/jmwallet/backends/offline.py 
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def has_mempool_access(self) -> bool:
    return False

OfflineBackendError

Bases: RuntimeError

Raised if an offline wallet operation unexpectedly requests blockchain data.

Source code in jmwallet/src/jmwallet/backends/offline.py 
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class OfflineBackendError(RuntimeError):
    """Raised if an offline wallet operation unexpectedly requests blockchain data."""