@indigo-labs/indigo-sdk/src/types/on-chain-decimal.ts

Indigo SDK for interacting with Indigo endpoints via lucid-evolution

import { TSchema } from '@evolution-sdk/evolution';
import { divideOnChainCompatible } from '../utils/bigint-utils';

export const OCD_DECIMAL_UNIT: bigint = 1_000_000n;

export const OnChainDecimalSchema = TSchema.Struct({
  getOnChainInt: TSchema.Integer,
});

export type OnChainDecimal = typeof OnChainDecimalSchema.Type;

export function ocdCeil(a: OnChainDecimal): bigint {
  const whole = a.getOnChainInt / OCD_DECIMAL_UNIT;

  return a.getOnChainInt > whole * OCD_DECIMAL_UNIT ? whole + 1n : whole;
}

export function ocdFloor(a: OnChainDecimal): bigint {
  return a.getOnChainInt / OCD_DECIMAL_UNIT;
}

export function ocdNegate(a: OnChainDecimal): OnChainDecimal {
  return { getOnChainInt: -a.getOnChainInt };
}

export function ocdMul(a: OnChainDecimal, b: OnChainDecimal): OnChainDecimal {
  return {
    getOnChainInt: divideOnChainCompatible(
      a.getOnChainInt * b.getOnChainInt,
      OCD_DECIMAL_UNIT,
    ),
  };
}

export function ocdDiv(a: OnChainDecimal, b: OnChainDecimal): OnChainDecimal {
  return {
    getOnChainInt: divideOnChainCompatible(
      a.getOnChainInt * OCD_DECIMAL_UNIT,
      b.getOnChainInt,
    ),
  };
}

export function ocdAdd(a: OnChainDecimal, b: OnChainDecimal): OnChainDecimal {
  return {
    getOnChainInt: a.getOnChainInt + b.getOnChainInt,
  };
}

export function ocdSub(a: OnChainDecimal, b: OnChainDecimal): OnChainDecimal {
  return {
    getOnChainInt: a.getOnChainInt - b.getOnChainInt,
  };
}

export const OCD_ONE: OnChainDecimal = { getOnChainInt: 1_000_000n };
export const OCD_ZERO: OnChainDecimal = { getOnChainInt: 0n };