dojo.money

ERC20 logic.

def to_human_format(money: int, decimals: int) -> decimal.Decimal:

Convert money number from machine format to user format.

Effectively implements money / 10 ** decimal.

Parameters
  • money: money number to convert
  • decimals: number of decimals to scale down by
def to_machine_format(money: decimal.Decimal, decimals: int) -> int:

Convert money number from user format to machine format.

Effectively multiplies money by 10 ** decimal.

Parameters
  • money: money number to convert
  • decimals: number of decimals to scale up by
@lru_cache(maxsize=None)
def get_decimals(backend: dojo.network.base_backend.BaseBackend, token: str) -> int:

Get the number of decimals of a token.

Runs the decimals() function of the ERC20 contract.

@lru_cache(maxsize=None)
def get_symbol(backend: dojo.network.base_backend.BaseBackend, address: str) -> str:

Get the symbol of a token.

Runs the symbol() function of the ERC20 contract.

def approve( backend: dojo.network.base_backend.BaseBackend, token_address: str, grantee_address: str, owner: str, allowance: int) -> web3.types.PendingTx:

Approve a grantee to move an allowance of ERC20 tokens on behalf of the owner.

Makes an approve() transaction to the ERC20 contract.