Denom Metadata

A denom is how tokens are represented within the Bank module of Injective. These assets can be used for trading, creating new markets on the exchange module, participating in auctions, transferring to another address, etc.

One of the biggest pain points for developers and traders is getting the metadata of these denoms. This metadata includes decimals, symbol, name, etc.

This guide shows how to fetch denom metadata directly from the injective-lists repository and map it to your denom. You can also use this approach to map denoms's metadata for Spot and Derivative Markets.

Injective Lists

injective-lists is a public repository that holds metadata information for all tokens on Injective. It's the most up-to-date and reliable source of this particular information.

The metadata is fetched automatically for new denoms on chain every 30 minutes and the json files are regenerated.

You can head to the https://github.com/InjectiveLabs/injective-lists/tree/master/json/tokens folder and download the metadata based on the environment:

1. Mainnet Raw JSON

2. Testnet Raw JSON

Once you have the JSON, you have to map the metadata with the particular denom.

The interface that this metadata information has is

export interface Token {
  name: string
  logo: string
  symbol: string
  decimals: number
  coinGeckoId: string
  denom: string
  address: string
  tokenType: string
  tokenVerification: string
}

Bank Balance

Let's say you fetch the bank balance of a particular address (as shown on the example below using TypeScript), you can easily map it to the metadata information from the JSON files above

import { config } from "dotenv";
import {
  ChainGrpcBankApi,
  IndexerGrpcAccountPortfolioApi,
} from "@injectivelabs/sdk-ts";
import { getNetworkEndpoints, Network } from "@injectivelabs/networks";

config();

/** Querying Example */
(async () => {
  const endpoints = getNetworkEndpoints(Network.MainnetSentry);
  const chainGrpcBankApi = new ChainGrpcBankApi(endpoints.grpc);

  const injectiveAddress = "inj...";
  const { balances } = chainGrpcBankApi.fetchBalances(injectiveAddress);

  console.log(bankBalances);

 const metadata = JSON.parse(await readFile("./mainnet.json", "utf8")) as {
    denom: string;
    address: string;
    decimals: string;
    logo: string;
    name: string;
    tokenType: string;
    coinGeckoId: string
  }[];
  const balances = bankBalances.map((balance) => {
    const meta = metadata.find((m) => m.denom === balance.denom);

    return {
      ...balance,
      ...meta,
    };
  }
  
  console.log(balances)
})();

Now, your bank balance has all of the metadata information that you need (including decimals, symbol, name, logo, etc).

Spot Market

Similar to the Bank balances, you can use the same approach to map the denoms within a Spot market with it's metadata.

import { config } from "dotenv";
import { IndexerGrpcSpotApi } from "@injectivelabs/sdk-ts";
import { getNetworkEndpoints, Network } from "@injectivelabs/networks";
import { readFile } from "fs/promises";

config();

/** Querying Example */
(async () => {
  const endpoints = getNetworkEndpoints(Network.Testnet);
  const indexerGrpcSpotApi = new IndexerGrpcSpotApi(endpoints.indexer);

  const markets = await indexerGrpcSpotApi.fetchMarkets();

  console.log(markets);

  const metadata = JSON.parse(await readFile("./mainnet.json", "utf8")) as {
    denom: string;
    address: string;
    decimals: string;
    logo: string;
    name: string;
    tokenType: string;
    coinGeckoId: string;
  }[];
  const marketsWithMetadata = markets.map((market) => {
    const baseTokenMetadata = metadata.find(
      (m) => m.denom === market.baseDenom
    );
    const quoteTokenMetadata = metadata.find(
      (m) => m.denom === market.quoteDenom
    );

    return {
      ...market,
      baseTokenMetadata,
      quoteTokenMetadata,
    };
  });

  console.log(marketsWithMetadata);
})();

Derivative Market

Similar to the Bank balances, you can use the same approach to map the denom within a Derivative market with it's metadata.

import { config } from "dotenv";
import { IndexerGrpcDerivativeApi } from "@injectivelabs/sdk-ts";
import { getNetworkEndpoints, Network } from "@injectivelabs/networks";
import { readFile } from "fs/promises";

config();

/** Querying Example */
(async () => {
  const endpoints = getNetworkEndpoints(Network.Testnet);
  const indexerGrpcDerivativeApi = new IndexerGrpcDerivativeApi(endpoints.indexer);

  const markets = await indexerGrpcDerivativeApi.fetchMarkets();

  console.log(markets);

  const metadata = JSON.parse(await readFile("./mainnet.json", "utf8")) as {
    denom: string;
    address: string;
    decimals: string;
    logo: string;
    name: string;
    tokenType: string;
    coinGeckoId: string;
  }[];
  const marketsWithMetadata = markets.map((market) => {
    const baseTokenMetadata = metadata.find(
      (m) => m.denom === market.baseDenom
    );

    return {
      ...market,
      quoteTokenMetadata,
    };
  });

  console.log(marketsWithMetadata);
})();