Add `createAssetId` function

[matt-user]

Motivation

Creating an assetId manually is easy, but is also easy to mess up. For new devs this function would be helpful.

Summary

• Add new function createAssetId
• Add documentation for createAssetId in Native Parameters -> Asset ID

Usage example

const assetId = createAssetId(contractId, subId)

Possible implementations

function createAssetId(contractId: string, subId: string) {
    const contractIdBytes = arrayify(contractId);
    const subIdBytes = arrayify(subId);
    const bits = sha256(concat([contractIdBytes, subIdBytes]));
    const assetId: AssetIdInput = {
        bits
    }
    return assetId
}

[petertonysmith94]

Could this be an extension of getMintedAssetId?

[Torres-ssf]

@matt-user We already have the helper getMintesAssetId that hashes both the contractId and the subId to return the assetId

[bolajahmad]

I agree with @Torres-ssf, there is already the getMintedAsset that returns pretty much the assetId and is the same function I had to use when writing the createAssetId. They are also located in the same file

Is there some special feature of the new createAssetId.