Verto Cache Interface

A communication package with Verto Cache System

Install

Install with npm:

$ npm install verto-cache-interface

Usage

Fetching a contract

Signature:
fetchContract<T = any>(contractId: string, withValidity?: boolean, dontThrow?: boolean): Promise<StateResult<T> | undefined>

Parameters:
T: Interface of the contract state to be returned
contractId: Contract to be fetched
withValidity: Whether validity should be fetched (Default: false)
dontThrow: Whether it should not throw an error if contract is not found (Default: false)

Usage:

import { fetchContract } from "verto-cache-interface";

fetchContract("t9T7DIOGxx4VWXoCEeYYarFYeERTpWIC1V3y-BPZgKE").then((result) => {
  const state = result.state;
  const validity = result.validity;
});

Fetching a balance of address in contract

Signature:
fetchBalanceByUserAddress = async (contractId: string, userAddress: string): Promise<UserBalance | undefined>

Parameters: contractId: Contract to be fetched userAddress: Address to obtain balance from

Usage:

import { fetchBalanceByUserAddress } from "verto-cache-interface";

fetchBalanceByUserAddress(
  "bQGRi3eO4p7S583mYYXDeVn5EvGPFMiMWd5WBWatteY",
  "vxUdiv2fGHMiIoek5E4l3M5qSuKCZtSaOBYjMRc94JU"
).then((result) => {
  const contractId = result.contractId;
  const contractName = result.name;
  const contractTicker = result.ticker;
  const contractLogo = result.logo;
  const userBalance = result.balance;
  const userAddress = result.userAddress;
  const contractType = result.type;
});

Fetching all the balances available for a given address

Signature:
fetchBalancesForAddress = async (userAddress: string, tokenType?: string): Promise<Array<UserBalance>>

Parameters: userAddress: Address to obtain balance from tokenType: Type to filter balances from, for example: 'art'.

Usage:

import { fetchBalancesForAddress } from "verto-cache-interface";

fetchBalancesForAddress("vxUdiv2fGHMiIoek5E4l3M5qSuKCZtSaOBYjMRc94JU").then(
  (result) => {
    const balances: Array<UserBalance> = result;
  }
);

Fetching all the balances for a given username

Signature:
fetchBalancesByUsername = async (username: string, tokenType?: string): Promise<Array<UserBalance> | undefined>

Parameters: username: Username to fetch balances from. tokenType: Type to filter balances from, for example: 'art'.

Usage:

import { fetchBalancesByUsername } from "verto-cache-interface";

fetchBalancesByUsername("t8").then((result) => {
  const balances: Array<UserBalance> = result;
  balances.forEach((balance) => {
    console.log("Contract Id ", balance.contractId);
    console.log("Balance ", balance.balance);
  });
});

Fetching all the balances inside a contract

Signature:
fetchBalancesInContract = async (contractId: string): Promise<BalanceAndContract>

Parameters: contractId: Contract to be fetched

Usage:

import { fetchBalancesInContract } from "verto-cache-interface";

fetchBalancesInContract("bQGRi3eO4p7S583mYYXDeVn5EvGPFMiMWd5WBWatteY").then(
  (result) => {
    const balances: BalanceAndContract = result;
    const [balancesObject, contractMetadata] = balances;

    const balanceForAddress =
      balancesObject["vxUdiv2fGHMiIoek5E4l3M5qSuKCZtSaOBYjMRc94JU"];
    const contractTicker = contractMetadata.ticker;
  }
);

Fetching a single collection by collection id

Signature:
fetchCollectionById = async (collectionId: string): Promise<CollectionResult | undefined>

Parameters: collectionId: Collection (contract) to be fetched

Usage:

import { fetchCollectionById } from "verto-cache-interface";

fetchCollectionById("GirFtyB_PI4oQXhEFrHZLpFUqincHrDdDxPaQ1M8r00").then(
  (result) => {
    const id = result.id;
    const collectionName = result.name;
    const description = result.description;
    const owner = result.owner;
    const collaborators = result.collaborators;
    const items = result.items;
  }
);

Fetching all contracts an address is part of

Signature:
fetchContractsInUser = async (addressId: string): Promise<Array<string>>

Parameters: addressId: Address to obtain related-contracts from

Usage:

import { fetchContractsInUser } from "verto-cache-interface";

fetchContractsInUser("vxUdiv2fGHMiIoek5E4l3M5qSuKCZtSaOBYjMRc94JU").then(
  (result) => {
    // Contract Ids
    const relatedContractsToUser: Array<string> = result;
  }
);

Fetching all tokens created by a user given a username

Signature:
fetchOwnershipByUsername = async (username: string): Promise<Array<string>>

Parameters: username: Username to fetch ownership from

Usage:

import { fetchOwnershipByUsername } from "verto-cache-interface";

fetchOwnershipByUsername("t8").then((result) => {
  // Contract Ids
  const tokensCreatedByUser: Array<string> = result;
});

Fetching Token Metadata

Signature:
fetchTokenMetadata = async (tokenId: string, fromContract?: boolean): Promise<TokenMetadata | undefined>

Parameters: tokenId: Token (contract) id to fetch metadata from fromContract: Whether it should be fetched from the Google CDN or Verto Database (Default: False)

Usage:

import { fetchTokenMetadata } from "verto-cache-interface";

fetchTokenMetadata("bQGRi3eO4p7S583mYYXDeVn5EvGPFMiMWd5WBWatteY").then(
  (result) => {
    const id = result.id;
    const type = result.type;
    const listerUsername = result.lister;
  }
);

Fetching Token State Metadata

Signature:
fetchTokenStateMetadata = async (tokenId: string): Promise<TokenStateMetadata | undefined>

Parameters: tokenId: Token (contract) id to fetch metadata from

Usage:

import { fetchTokenStateMetadata } from "verto-cache-interface";

fetchTokenStateMetadata("bQGRi3eO4p7S583mYYXDeVn5EvGPFMiMWd5WBWatteY").then(
  (result) => {
    const id = result.id;
    const tokenName = result.name;
    const owner = result.owner;
    const ticker = result.ticker;
  }
);

Fetching all registered tokens

Signature:
fetchTokens = async (specificType?: string): Promise<Array<TokenMetadata>>

Parameters: specificType: Whether to filter tokens with a specific type

Usage:

import { fetchTokens } from "verto-cache-interface";

fetchTokens().then((result) => {
  const allTokens: Array<TokenMetadata> = result;
  allTokens.forEach((item) => {
    console.log("Id ", item.id);
    console.log("Type ", item.type);
    console.log("Lister ", item.lister);
  });
});

Fetching random artwork

Signature:
fetchRandomArtwork = async (limit: number = 4): Promise<RandomArtworkResult>

Parameters: limit: Maximum number of artwork to be fetched (Default: 4)

Usage:

import { fetchRandomArtwork } from "verto-cache-interface";

fetchRandomArtwork().then((result) => {
  const artwork: Array<TokenMetadata> = result.entities;

  artwork.forEach((item) => {
    console.log("Lister", item.lister);
    console.log("Type", item.type);
    console.log("Contract ID", item.contractId);
  });
});

Fetching all creations (art) given a username

Signature:
fetchUserCreations = async (username: string): Promise<Array<string>>

Parameters: username: Username to fetch creations from

Usage:

import { fetchUserCreations } from "verto-cache-interface";

fetchUserCreations("t8").then((result) => {
  // Contract Ids
  const creations: Array<string> = result;
});

Fetching user metadata given a username

Signature:
fetchUserMetadataByUsername = async (username: string): Promise<UserMetadata | undefined>

Parameters: username: Username to fetch metadata from

Usage:

import { fetchUserMetadataByUsername } from "verto-cache-interface";

fetchUserMetadataByUsername("t8").then((result) => {
  const username = result.username;
  const addresses: Array<string> = result.addresses;
});

Fetching all registered users

Signature:
fetchUsers = async (): Promise<Array<CommunityContractPeople>>

Usage:

import { fetchUsers } from "verto-cache-interface";

fetchUsers().then((result) => {
  result.forEach((user) => {
    console.log("Username ", user.username);
    console.log("Name ", user.name);
    console.log("Addresses ", user.addresses);
    console.log("Image ", user.image);
    console.log("Bio ", user.bio);
    console.log("Links ", user.links);
  });
});

Fetching user by username

Signature:
fetchUserByUsername = async (): Promise<CommunityContractPeople | undefined>

Usage:

import { fetchUserByUsername } from "verto-cache-interface";

fetchUserByUsername("t8").then((result) => {
  console.log("Username ", user.username);
  console.log("Name ", user.name);
  console.log("Addresses ", user.addresses);
  console.log("Image ", user.image);
  console.log("Bio ", user.bio);
  console.log("Links ", user.links);
});

Fetching random artwork with owner information

Signature:
fetchRandomArtworkWithUser = async (amount?: number): Promise<Array<ArtworkOwner>>

Usage:

import { fetchRandomArtworkWithUser } from "verto-cache-interface";

fetchRandomArtworkWithUser().then((arts) => {
  arts.forEach((result) => {
    console.log("Artwork ID ", result.id);
    console.log("Name ", result.name);
    console.log("Type ", result.type);
    console.log("Images ", result.images);
    console.log("Owner username ", result.owner.username);
  });
});

Fetching random communities without full metadata

Signature:
fetchRandomCommunities = async (): Promise<TokenMetadataLookUp>

Usage:

import { fetchRandomCommunities } from "verto-cache-interface";

fetchRandomCommunities().then((result) => {
  const communities = result.entities;
  communities.forEach((com) => {
    console.log(com.contractId);
    console.log(com.type);
    console.log(com.lister);
    console.log(com.id);
  });
});

Fetching random communities with full metadata

Signature:
fetchRandomCommunitiesWithMetadata = async (): Promise<Array<RandomCommunities>>

Usage:

import { fetchRandomCommunitiesWithMetadata } from "verto-cache-interface";

fetchRandomCommunitiesWithMetadata().then((result) => {
  result.forEach((com) => {
    console.log(com.id);
    console.log(com.name);
    console.log(com.ticker);
    console.log(com.logo);
    console.log(com.description);
  });
});

Fetching top communities with full metadata

Signature:
fetchTopCommunities = async (): Promise<Array<RandomCommunities>>

Usage:

import { fetchTopCommunities } from "verto-cache-interface";

fetchTopCommunities().then((result) => {
  result.forEach((com) => {
    console.log(com.id);
    console.log(com.name);
    console.log(com.ticker);
    console.log(com.logo);
    console.log(com.description);
  });
});

Fetching full metadata for given communities

Signature:
fetchCommunitiesMetadata = async (communityContractIds: Array<string> | string): Promise<Array<RandomCommunities>>

Usage:

import { fetchCommunitiesMetadata } from "verto-cache-interface";

fetchCommunitiesMetadata(["MY-community-id1", "MY-community-id2"]).then(
  (result) => {
    result.forEach((com) => {
      console.log(com.id);
      console.log(com.name);
      console.log(com.ticker);
      console.log(com.logo);
      console.log(com.description);
    });
  }
);

Fetching artwork metadata

Signature:
fetchArtworkMetadata = async (): Promise<ArtworkMetadata | undefined>

Usage:

import { fetchArtworkMetadata } from "verto-cache-interface";

fetchArtworkMetadata().then((result) => {
  console.log(result.id);
  console.log(result.name);
  console.log(result.lister); // Object (username, name, addresses, bio, links, image)
  console.log(result.lister.addresses);
  console.log(result.lister.bio);
  console.log(result.lister.links);
});

Fetching token by id and optional filtering

Signature:
fetchTokenById = async (tokenId: string, filter?: (val: CommunityContractToken) => boolean): Promise<CommunityContractToken | undefined>

Usage:

import { fetchTokenById } from "verto-cache-interface";

fetchTokenById("ABC").then((result) => {
  console.log(result.id);
  console.log(result.type);
  console.log(result.lister);
});

fetchTokenById("ABC", (filterData) => filterData.type === "community").then(
  (result) => {
    console.log(result.id);
    console.log(result.type);
    console.log(result.lister);
  }
);

Fetching Paginated Items (Tokens | People)

Signature:
fetchPaginated = async<T extends PaginatedToken | CommunityPeople>(type: "people" | "tokens", pageSize: number = 10, page: number = 1, sort: boolean = false): Promise<PaginatedData<T>>

Usage:

import { fetchPaginated } from "verto-cache-interface";

fetchPaginated<PaginatedToken>("tokens").then(async (result) => {
  console.log(result.items); // [token1, token2, ...]
  console.log(result.hasNextPage()); // true
  console.log(await result.nextPage()); // CALL next page: fetchPaginated("tokens", 10, 2)
  console.log(result.isEmpty()); // False
  console.log(result.getPaginationInfo()); // Information about paginated results
});

Fetching price history

Signature fetchPriceHistory = async (pair: [string, string], desc?: boolean): Promise<Array<VwapModel>>

Usage

import { fetchPriceHistory } from "verto-cache-interface"

fetchPriceHistory(["A", "B"]).then((result) => {
    result.forEach((vwap) => {
        console.log(vwap.block);
        console.log(vwap.vwap);
        console.log(vwap.dominantToken);
    });
})

Fetching latest price

Signature fetchLatestPrice = async (pair: [string, string]): Promise<VwapModel | undefined>

Usage

import { fetchLatestPrice } from "verto-cache-interface"

fetchLatestPrice(["A", "B"]).then((result) => {
    console.log(vwap.block);
    console.log(vwap.vwap);
    console.log(vwap.dominantToken);
})

Hooks

Hooks are a way to invoke functions and then invoke certain behaviors inside the cache system.

cacheContractHook

Signature:
cacheContractHook = async (action: () => Promise<any> | any, contractId?: string | string[], refreshCommunityContract?: boolean)

Parameters:
action: Action to be called inside before executing the hook
contractId: Contract to be cached right after action has finished its execution. If an array, it'll cache all the ids provided in the array.
refreshCommunityContract: Whether the community contract should be updated after action has finished its execution

Usage:

import { cacheContractHook } from "verto-cache-interface";

const currentContract: string = "ABCD1234";
// const currentContracts: string[] = ['ABCD1234', '12903LLLEP'];

const executeOrder = await cacheContractHook(
  async () => {
    // Execute an order inside the exchange
    // Or do something different, maybe buy a car.
    return "ORDER_SENT";
  },
  currentContract,
  true
);

assert(executeOrder === "ORDER_SENT");

Lifecycle:

1. Execute action (if asynchronous, it will be awaited)
2. Call Cache API to invoke caching of contractId
3. if refreshCommunityContract is true, call Cache API to invoke caching of community contract

Pointing to different cache URLS

import { CacheInterfaceConstants } from "verto-cache-interface";

CacheInterfaceConstants.CACHE_API = "http://localhost";
CacheInterfaceConstants.COMMUNITY_CONTRACT = "[id]";
CacheInterfaceConstants.CONTRACT_CDN = "https://storage.googleapis.com/contracts";

render();