0xweb/dequanto/src/ns/utils/$ns.ts

Contract package manager and other web3 tools

import { TEth } from '@dequanto/models/TEth';
import { $contract } from '@dequanto/utils/$contract';

export namespace $ns {
    export function isNsAlike(name: string): boolean {
        return /^[\w._-](?<tld>\.\w{1,4})(\/.+)?$/.test(name);
    }

    export function namehash(domain: string): TEth.Hex {
        let labels = domain.toLowerCase().split('.');
        let node = '0x' + ''.padStart(64,'0');
        for(let i = labels.length - 1; i >= 0; i--) {
            let labelSha = $contract.keccak256(labels[i]).substring(2);

            node = $contract.keccak256(`${node}${labelSha}`);
        }
        return node as TEth.Hex;
    }

    export function getRoot (uri: string) {
        let domain = /^[\w\.]+/.exec(uri)[0];
        return domain;
    }
    export function getPath (uri: string) {
        return uri.replace(/^(\w+:\/\/)?[^/]+\/*/, '');
    }
}