DIM Plugins (Python)

Plugins

1. Data Coding
   • Base-58
   • Base-64
   • Hex
   • UTF-8
   • JsON
   • PNF (Portable Network File)
   • TED (Transportable Encoded Data)
2. Digest Digest
   • MD-5
   • SHA-1
   • SHA-256
   • Keccak-256
   • RipeMD-160
3. Cryptography
   • AES-256 (AES/CBC/PKCS7Padding)
   • RSA-1024 (RSA/ECB/PKCS1Padding), (SHA256withRSA)
   • ECC (Secp256k1)
4. Address
   • BTC
   • ETH
5. Meta
   • MKM (Default)
   • BTC
   • ETH
6. Document
   • Visa (User)
   • Profile
   • Bulletin (Group)

Extends

Address

from typing import Optional

from dimp import *
from dimplugins import *


class CompatibleAddressFactory(BaseAddressFactory):

    # Override
    def _parse(self, address: str) -> Optional[Address]:
        size = len(address)
        if size == 0:
            assert False, 'address should not be empty'
        elif size == 8:
            # "anywhere"
            if address.lower() == 'anywhere':
                return ANYWHERE
        elif size == 10:
            # "everywhere"
            if address.lower() == 'everywhere':
                return EVERYWHERE
        #
        #  checking normal address
        #
        if 26 <= size <= 35:
            res = BTCAddress.from_str(address=address)
        elif size == 42:
            res = ETHAddress.from_str(address=address)
        else:
            # assert False, 'invalid address: %s' % address
            res = None
        #
        #  TODO: other types of address
        #
        if res is None and 4 <= size <= 64:
            res = UnknownAddress(address=address)
        assert res is not None, 'invalid address: %s' % address
        return res


class UnknownAddress(ConstantString, Address):
    """
        Unsupported Address
        ~~~~~~~~~~~~~~~~~~~
    """

    def __init__(self, address: str):
        super().__init__(string=address)

    @property  # Override
    def network(self) -> int:
        return 0  # EntityType.USER.value

Meta

from typing import Optional, Dict

from dimp import Meta
from dimplugins import *


class CompatibleMetaFactory(BaseMetaFactory):

    # Override
    def parse_meta(self, meta: Dict) -> Optional[Meta]:
        helper = account_helper()
        version = helper.get_meta_type(meta=meta)
        if version in ['1', 'mkm', 'MKM']:
            # MKM
            out = DefaultMeta(meta=meta)
        elif version in ['2', 'btc', 'BTC']:
            # BTC
            out = BTCMeta(meta=meta)
        elif version in ['4', 'eth', 'ETH']:
            # ETH
            out = ETHMeta(meta=meta)
        else:
            raise TypeError('unknown meta type: %d' % version)
        if out.is_valid:
            return out


def account_extensions() -> GeneralAccountExtension:
    return shared_account_extensions


def account_helper() -> GeneralAccountHelper:
    ext = account_extensions()
    return ext.helper

ExtensionLoader

from dimp import MetaType, ContentType
from dimplugins import ExtensionLoader

from ..protocol import HandshakeCommand, BaseHandshakeCommand
from ..protocol import AppCustomizedContent


class CommonExtensionLoader(ExtensionLoader):

    # Override
    def register_address_factory(self):
        Address.set_factory(factory=CompatibleAddressFactory())

    # Override
    def register_meta_factories(self):
        mkm = CompatibleMetaFactory(version=MetaType.MKM)
        btc = CompatibleMetaFactory(version=MetaType.BTC)
        eth = CompatibleMetaFactory(version=MetaType.ETH)
        Meta.set_factory(version='1', factory=mkm)
        Meta.set_factory(version='2', factory=btc)
        Meta.set_factory(version='4', factory=eth)
        Meta.set_factory(version='mkm', factory=mkm)
        Meta.set_factory(version='btc', factory=btc)
        Meta.set_factory(version='eth', factory=eth)
        Meta.set_factory(version='MKM', factory=mkm)
        Meta.set_factory(version='BTC', factory=btc)
        Meta.set_factory(version='ETH', factory=eth)

    # Override
    def register_content_factories(self):
        super().register_content_factories()
        self.register_customized_factories()

    # protected
    def register_customized_factories(self):
        # Application Customized
        self._set_content_factory(msg_type=ContentType.APPLICATION, content_class=AppCustomizedContent)
        self._set_content_factory(msg_type=ContentType.CUSTOMIZED, content_class=AppCustomizedContent)

    # Override
    def register_command_factories(self):
        super().register_command_factories()
        # Handshake
        self._set_command_factory(cmd=HandshakeCommand.HANDSHAKE, command_class=BaseHandshakeCommand)

Plugin Loader

from dimplugins import PluginLoader

from .mdx import MD5, MD5Digester
from .mdx import SHA1, SHA1Digester


class CommonPluginLoader(PluginLoader):

    # Override
    def _load_message_digesters(self):
        super()._load_message_digesters()
        self.register_md5_digester()
        self.register_sha1_digester()

    # protected
    def register_md5_digester(self):
        MD5.digester = MD5Digester()

    # protected
    def register_sha1_digester(self):
        SHA1.digester = SHA1Digester()

Usage

You must load all plugins before your business run:

from dimplugins import ExtensionLoader
from dimplugins import PluginLoader

from .compat_loader import CommonExtensionLoader
from .compat_loader import CommonPluginLoader


class LibraryLoader:

    def __init__(self, extensions: ExtensionLoader = None, plugins: PluginLoader = None):
        super().__init__()
        self.__extensions = CommonExtensionLoader() if extensions is None else extensions
        self.__plugins = CommonPluginLoader() if plugins is None else plugins
        self.__loaded = False

    def run(self):
        if self.__loaded:
            # no need to load it again
            return
        else:
            # mark it to loaded
            self.__loaded = True
        # try to load all plugins
        self.load()
        
    # protected
    def load(self):
        self.__extensions.load()
        self.__plugins.load()


if __name__ == '__main__':
  loader = LibraryLoader()
  loader.run()
  # do your jobs after all extensions & plugins loaded

You must ensure that every Address you extend has a Meta type that can correspond to it one by one.

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