class BlockChain
implements BlockChainApi
import { BlockChain } from "https://deno.land/x/datastructure@1.1.0/blockChain/blockChain.ts";
x/datastructure/blockChain/blockChain.ts>BlockChain
import { BlockChain } from "https://deno.land/x/datastructure@1.1.0/blockChain/blockChain.ts";