(max 8 decimal points) API returns amounts and rates as string Lowest: OMG/BTC 0.00023935 Highest: BTC/USDC 6674.34
(max 8 decimal points) API returns amounts and rates as string Lowest: NPXS/BTC 0.00000001 Highest: BCHABC/BTC 0.044838
(max 8 decimal points) API returns amounts and rates as string Lowest: HYP/BTC 0.00000005 Highest: BTC/THB 219849.95
(max 6 decimal points) API returns amounts and rates as string Lowest: DOGE/BTC 0.00000038 Highest: BTC/JPY 687798.0000
| # Take decimal.exs from https://github.com/ericmj/decimal/blob/master/lib/decimal.ex | |
| Code.require_file("decimal.exs") | |
| IO.puts("----- ASSUMPTIONS -----") | |
| precision = 36 | |
| rounding = :half_even | |
| Decimal.get_context() | |
| |> Map.put(:precision, precision) | |
| |> Map.put(:rounding, rounding) | |
| |> Decimal.set_context() | |
| IO.puts("Precision is set to #{inspect(precision)}") | |
| IO.puts("Rounding is set to #{inspect(rounding)}") | |
| # Smallest number (18 decimal points, anything smaller is rounded off and represented as exponents | |
| {:ok, smallest} = Decimal.parse("0.111111111111111111") | |
| IO.puts("Assuming the smallest amount possible is #{Decimal.to_string(smallest)}") | |
| # Largest number (18 digits), anything larger is rounded off and represented as exponents | |
| {:ok, largest} = Decimal.parse("111111111111111111.0") | |
| IO.puts("Assuming the largest amount possible is #{Decimal.to_string(largest)}") | |
| IO.puts("\n----- CALCULATIONS -----") | |
| # Smallest -> smallest | |
| # smallest * rate = smallest | |
| # rate = smallest / smallest | |
| smallest | |
| |> Decimal.div(smallest) | |
| |> IO.inspect(label: "Rate for smallest -> smallest") | |
| # Largest -> largest | |
| # largest * rate = largest | |
| # rate = largest / largest | |
| smallest | |
| |> Decimal.div(smallest) | |
| |> IO.inspect(label: "Rate for largest -> largest") | |
| # Smallest -> largest | |
| # smallest * rate = largest | |
| # rate = largest / smallest | |
| largest | |
| |> Decimal.div(smallest) | |
| |> IO.inspect(label: "Rate for smallest -> largest") | |
| # Largest -> Smallest | |
| # largest * rate = smallest | |
| # rate = smallest / largest | |
| smallest | |
| |> Decimal.div(largest) | |
| |> IO.inspect(label: "Rate for largest -> smallest") |
| $ elixir decimals.exs | |
| ----- ASSUMPTIONS ----- | |
| Precision is set to 36 | |
| Rounding is set to :half_even | |
| Assuming the smallest amount possible is 0.111111111111111111 | |
| Assuming the largest amount possible is 111111111111111111.0 | |
| ----- CALCULATIONS ----- | |
| Rate for smallest -> smallest: #Decimal<1> | |
| Rate for largest -> largest: #Decimal<1> | |
| Rate for smallest -> largest: #Decimal<1.0E+18> | |
| Rate for largest -> smallest: #Decimal<1E-18> |