iota/transaction/base.py
def from_tryte_string(cls, trytes, hash_=None):
        # type: (TrytesCompatible, Optional[TransactionHash]) -> Transaction
        """
        Creates a Transaction object from a sequence of trytes.

        :param trytes:
            Raw trytes.  Should be exactly 2673 trytes long.

        :param hash_:
            The transaction hash, if available.

            If not provided, it will be computed from the transaction
            trytes.
        """
        tryte_string = TransactionTrytes(trytes)

        if not hash_:
            hash_trits = [0] * HASH_LENGTH  # type: MutableSequence[int]

            sponge = Curl()
            sponge.absorb(tryte_string.as_trits())
            sponge.squeeze(hash_trits)

            hash_ = TransactionHash.from_trits(hash_trits)

        return cls(
            hash_=hash_,
            signature_message_fragment=Fragment(tryte_string[0:2187]),
            address=Address(tryte_string[2187:2268]),
            value=int_from_trits(tryte_string[2268:2295].as_trits()),
            legacy_tag=Tag(tryte_string[2295:2322]),
            timestamp=int_from_trits(tryte_string[2322:2331].as_trits()),
            current_index=int_from_trits(tryte_string[2331:2340].as_trits()),
            last_index=int_from_trits(tryte_string[2340:2349].as_trits()),
            bundle_hash=BundleHash(tryte_string[2349:2430]),
            trunk_transaction_hash=TransactionHash(tryte_string[2430:2511]),
            branch_transaction_hash=TransactionHash(tryte_string[2511:2592]),
            tag=Tag(tryte_string[2592:2619]),

            attachment_timestamp=int_from_trits(
                tryte_string[2619:2628].as_trits()),

            attachment_timestamp_lower_bound=int_from_trits(
                tryte_string[2628:2637].as_trits()),

            attachment_timestamp_upper_bound=int_from_trits(
                tryte_string[2637:2646].as_trits()),

            nonce=Nonce(tryte_string[2646:2673]),
        )
def from_tryte_string(cls, trytes, hash_=None):
        # type: (TrytesCompatible, Optional[TransactionHash]) -> Transaction
        """
        Creates a Transaction object from a sequence of trytes.

        :param trytes:
            Raw trytes.  Should be exactly 2673 trytes long.

        :param hash_:
            The transaction hash, if available.

            If not provided, it will be computed from the transaction
            trytes.
        """
        tryte_string = TransactionTrytes(trytes)

        if not hash_:
            hash_trits = [0] * HASH_LENGTH  # type: MutableSequence[int]

            sponge = Curl()
            sponge.absorb(tryte_string.as_trits())
            sponge.squeeze(hash_trits)

            hash_ = TransactionHash.from_trits(hash_trits)

        return cls(
            hash_=hash_,
            signature_message_fragment=Fragment(tryte_string[0:2187]),
            address=Address(tryte_string[2187:2268]),
            value=int_from_trits(tryte_string[2268:2295].as_trits()),
            legacy_tag=Tag(tryte_string[2295:2322]),
            timestamp=int_from_trits(tryte_string[2322:2331].as_trits()),
            current_index=int_from_trits(tryte_string[2331:2340].as_trits()),
            last_index=int_from_trits(tryte_string[2340:2349].as_trits()),
            bundle_hash=BundleHash(tryte_string[2349:2430]),
            trunk_transaction_hash=TransactionHash(tryte_string[2430:2511]),
            branch_transaction_hash=TransactionHash(tryte_string[2511:2592]),
            tag=Tag(tryte_string[2592:2619]),

            attachment_timestamp=int_from_trits(
                tryte_string[2619:2628].as_trits()),

            attachment_timestamp_lower_bound=int_from_trits(
                tryte_string[2628:2637].as_trits()),

            attachment_timestamp_upper_bound=int_from_trits(
                tryte_string[2637:2646].as_trits()),

            nonce=Nonce(tryte_string[2646:2673]),
        )
Creates a Transaction object from a sequence of trytes.

        :param trytes:
            Raw trytes.  Should be exactly 2673 trytes long.

        :param hash_:
            The transaction hash, if available.

            If not provided, it will be computed from the transaction
            trytes.