85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
# # ⚠ Warning
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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# LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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# NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# [🥭 Mango Markets](https://mango.markets/) support is available at:
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# [Docs](https://docs.mango.markets/)
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# [Discord](https://discord.gg/67jySBhxrg)
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# [Twitter](https://twitter.com/mangomarkets)
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# [Github](https://github.com/blockworks-foundation)
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# [Email](mailto:hello@blockworks.foundation)
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import abc
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import logging
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import typing
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from solana.publickey import PublicKey
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from .token import Token
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# # 🥭 TokenLookup class
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#
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# This class allows us to look up token symbols, names, mint addresses and decimals, all from our Mango
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# and Solana static data.
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#
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# It's usually easiest to access it via the `Context` as `context.token_lookup`.
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#
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class TokenLookup(metaclass=abc.ABCMeta):
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def __init__(self) -> None:
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self.logger: logging.Logger = logging.getLogger(self.__class__.__name__)
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@abc.abstractmethod
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def find_by_symbol(self, symbol: str) -> typing.Optional[Token]:
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raise NotImplementedError("TokenLookup.find_by_symbol() is not implemented on the base type.")
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@abc.abstractmethod
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def find_by_mint(self, mint: PublicKey) -> typing.Optional[Token]:
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raise NotImplementedError("TokenLookup.find_by_mint() is not implemented on the base type.")
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def find_by_symbol_or_raise(self, symbol: str) -> Token:
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token = self.find_by_symbol(symbol)
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if token is None:
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raise Exception(f"Could not find token with symbol '{symbol}'.")
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return token
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def find_by_mint_or_raise(self, mint: PublicKey) -> Token:
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token = self.find_by_mint(mint)
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if token is None:
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raise Exception(f"Could not find token with mint {mint}.")
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return token
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# # 🥭 CompoundTokenLookup class
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#
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# This class allows multiple `TokenLookup` objects to be combined, returning the first valid lookup result
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# found.
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#
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class CompoundTokenLookup(TokenLookup):
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def __init__(self, lookups: typing.Sequence[TokenLookup]) -> None:
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super().__init__()
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self.lookups: typing.Sequence[TokenLookup] = lookups
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def find_by_symbol(self, symbol: str) -> typing.Optional[Token]:
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for lookup in self.lookups:
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result = lookup.find_by_symbol(symbol)
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if result is not None:
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return result
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return None
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def find_by_mint(self, mint: PublicKey) -> typing.Optional[Token]:
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for lookup in self.lookups:
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result = lookup.find_by_mint(mint)
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if result is not None:
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return result
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return None
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