Utility

Currency

NCG

Nine Chronicles has a currency called Nine Chronicles Gold, abbreviated as “NCG”. It is used for staking, called Monster Collections. It can also be used to purchase or enhance items, or to purchase Arena tickets.

import { NCG } from “@planetarium/lib9c”;

However, Nine Chronicles operates two networks, Odin and Heimdall, under a system called Multiplanetary. Both are valid mainnets, but the WNCG bridge is unique to Odin. On Heimdall, you should use MINTERLESS_NCG instead of NCG.

import { MINTELESS_NCG } from “@planetarium/lib9c”;

CRYSTAL

'CRYSTAL' is the currency used to unlock and craft item recipes and participate in the Arena. It can be obtained through staking rewards.

import { CRYSTAL } from “@planetarium/lib9c”;

MEAD

'MEAD' is a currency used as a transaction fee on the Nine Chronicles network.

import { MEAD } from “@planetarium/lib9c”;

GARAGE

'GARAGE' is used to move non-transferable goods. See NCIP-16.

import { GARAGE } from “@planetarium/lib9c”;

Utility functions

fav

To create a FungibleAssetValue from the original @planetarium/tx, we need to write the code below. The code below creates a FungibleAssetValue that means 10 CRYSTAL.

const fav: FungibleAssetValue = {
  currency: CRYSTAL,
  rawValue: BigInt(new Decimal(10).mul(Decimal.pow(10, CRYSTAL.decimalPlaces)).toString())
}

The reason we do this with decimal.js is because FungibleAssetValue (hereafter FAV) doesn't otherwise support decimals when displaying quantities. Not supporting decimals doesn't really mean it doesn't support decimals, it just defines the decimal places by the value in Currency.decimalPlaces while keeping the actual value as an integer.

For example, when creating a 2 NCG, the FAV.rawValue is 200n. Because NCG.decimalPlaces is 2, the 00 part is used as the decimal place and the 2 part is used as the natural number part, which is expressed as 2.00 NCG in common decimal notation.

The fav function is a utility function that allows you to abbreviate code like this. The above code would look like this as a fav function

fav(NCG, 2);

However, it is not recommended to use the number type to handle prime numbers because there is an error in floating point numbers. In addition to prime numbers, there are also limits on the size of numbers, so you should use bigint, string, or decimal.js. If you do use decimal.js, make it a string type with .toString() and pass it to us.

import { fav } from “@planetarium/lib9c”;