112 lines
4.0 KiB
Python
112 lines
4.0 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 logging
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import typing
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from decimal import Decimal
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from solana.publickey import PublicKey
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from .constants import SOL_DECIMALS, SOL_MINT_ADDRESS
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class Instrument:
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def __init__(self, symbol: str, name: str, decimals: Decimal) -> None:
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self._logger: logging.Logger = logging.getLogger(self.__class__.__name__)
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self.symbol: str = symbol.upper()
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self.name: str = name
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self.decimals: Decimal = decimals
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def round(self, value: Decimal) -> Decimal:
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return round(value, int(self.decimals))
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def shift_to_decimals(self, value: Decimal) -> Decimal:
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divisor = Decimal(10 ** self.decimals)
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shifted = value / divisor
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return shifted
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def shift_to_native(self, value: Decimal) -> Decimal:
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multiplier = Decimal(10 ** self.decimals)
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shifted = value * multiplier
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return round(shifted, 0)
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def symbol_matches(self, symbol: str) -> bool:
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return self.symbol.upper() == symbol.upper()
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# Instruments are equal if they have the same normalised symbol.
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def __eq__(self, other: typing.Any) -> bool:
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if isinstance(other, Instrument):
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return self.symbol == other.symbol
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return False
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def __str__(self) -> str:
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return f"« Instrument [{self.symbol}] '{self.name}' »"
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def __repr__(self) -> str:
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return f"{self}"
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# # 🥭 Token class
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#
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# `Token` defines aspects common to every token.
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#
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class Token(Instrument):
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def __init__(self, symbol: str, name: str, decimals: Decimal, mint: PublicKey) -> None:
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super().__init__(symbol, name, decimals)
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self.mint: PublicKey = mint
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def ensure(uncertain_token: Instrument) -> "Token":
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if isinstance(uncertain_token, Token):
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return uncertain_token
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raise Exception(f"Instrument {uncertain_token} cannot be converted to SPL Token")
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@staticmethod
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def find_by_symbol(values: typing.Sequence["Token"], symbol: str) -> "Token":
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found = [value for value in values if value.symbol_matches(symbol)]
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if len(found) == 0:
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raise Exception(f"Token '{symbol}' not found in token values: {values}")
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if len(found) > 1:
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raise Exception(f"Token '{symbol}' matched multiple tokens in values: {values}")
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return found[0]
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@staticmethod
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def find_by_mint(values: typing.Sequence["Token"], mint: PublicKey) -> "Token":
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found = [value for value in values if value.mint == mint]
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if len(found) == 0:
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raise Exception(f"Token '{mint}' not found in token values: {values}")
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if len(found) > 1:
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raise Exception(f"Token '{mint}' matched multiple tokens in values: {values}")
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return found[0]
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# Tokens are equal if they have the same mint address.
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def __eq__(self, other: typing.Any) -> bool:
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if isinstance(other, Token):
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return self.mint == other.mint
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return False
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def __str__(self) -> str:
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return f"« Token [{self.symbol}] '{self.name}' [{self.mint} ({self.decimals} decimals)] »"
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# # 🥭 SolToken object
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#
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# It's sometimes handy to have a `Token` for SOL, but SOL isn't actually a token and can't appear in baskets. This object defines a special case for SOL.
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#
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SolToken = Token("SOL", "Pure SOL", SOL_DECIMALS, SOL_MINT_ADDRESS)
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