@tetherto/wdk-asset-registry

@tetherto/wdk-asset-registry

Note: This package is currently in beta. Please test thoroughly in development environments before using in production.

A lightweight registry for accessing predefined blockchain assets across multiple chains. This package provides a generic base asset registry plus a token-specific registry for retrieving metadata such as symbol, decimals, asset identifiers, contract addresses, and native-asset status.

🔍 About WDK

This module is part of the WDK (Wallet Development Kit) project, which empowers developers to build secure, non-custodial wallets with unified blockchain access, stateless architecture, and complete user control.

For detailed documentation about the complete WDK ecosystem, visit docs.wallet.tether.io.

🌟 Features

• Generic Asset Registry: Build registries for reusable asset collections
• Token Asset Registry: Use token-specific lookups such as id, symbol, address, and chain
• Bundled Asset Lists: Import registry-ready assets from @tetherto/wdk-asset-registry/assets/*
• Standardized Schemas: Validate base assets and token assets with Zod
• Flexible Lookup: Query base assets with partial match filters
• Porting Helpers: Normalize third-party token-list entries into TokenAsset
• Lightweight: No RPC or blockchain interaction required
• In-Memory Registry: Supports both lookup and local registration of assets

⬇️ Installation

To install the @tetherto/wdk-asset-registry package, follow these instructions:

You can install it using npm:

npm install @tetherto/wdk-asset-registry

🚀 Quick Start

Importing from @tetherto/wdk-asset-registry

import { WdkTokenAssetRegistry } from '@tetherto/wdk-asset-registry'
import commonTokens from '@tetherto/wdk-asset-registry/assets/common-tokens'

const registry = new WdkTokenAssetRegistry(commonTokens)

You can also preload multiple asset sets:

const registry = new WdkTokenAssetRegistry(commonTokens, customTokens)

Get Assets by Symbol

const usdt = registry.getTokenBySymbol('usdt')
console.log(usdt)

Get Assets by Address

const usdt = registry.getTokenByAddress(
  '0xdAC17F958D2ee523a2206206994597C13D831ec7'
)
console.log(usdt)

Get Assets by ID

const usdt = registry.getTokenById('eip155:1/0xdAC17F958D2ee523a2206206994597C13D831ec7')
console.log(usdt)

Filter by Chain ID

const ethereumUsdt = registry.getTokenByChain('eip155:1')
console.log(ethereumUsdt)

Query Base Assets with Partial Filters

import WdkBaseAssetRegistry, { BaseAssetSchema } from '@tetherto/wdk-asset-registry'

class CustomAssetRegistry extends WdkBaseAssetRegistry {
  _assertAsset (asset) {
    return BaseAssetSchema.parse(asset)
  }
}

const registry = new CustomAssetRegistry(commonTokens)

const ethereumUsdt = registry.getAsset([
  {
    id: 'eip155:1/0xdAC17F958D2ee523a2206206994597C13D831ec7',
    chainId: 'eip155:1'
  }
])

Query Base Assets with Multiple Filters

const selectedAssets = registry.getAsset([
  {
    id: 'eip155:1/0xdAC17F958D2ee523a2206206994597C13D831ec7',
    chainId: 'eip155:1'
  },
  {
    id: 'eip155:1/0x68749665ff8d2d112fa859aa293f07a622782f38',
    chainId: 'eip155:1'
  }
])

// Returns assets matching either condition above
console.log(selectedAssets)

Register a Custom Token

registry.registerAsset({
  id: 'eip155:1/0x1111111111111111111111111111111111111111',
  address: '0x1111111111111111111111111111111111111111',
  symbol: 'TEST',
  name: 'Test Token',
  decimals: 18,
  chainId: 'eip155:1',
  isNative: false
})

Normalize Third-Party Token Lists

import { fromUniswapTokenList } from '@tetherto/wdk-asset-registry'

const normalizedTokens = fromUniswapTokenList(
  source.tokens
)

The helper accepts the tokens array directly and converts each entry into a validated TokenAsset. It assumes Uniswap-style numeric EVM chain ids and maps them to eip155:*.

📚 API Reference

Table of Contents

Section	Description	Methods
Types	Asset type definitions	BaseAsset, TokenAsset, BaseAssetFilter, BaseAssetOptions
Errors	Error classes exported by the registry	AssetRegistryError
WdkBaseAssetRegistry	Generic registry for assets with ids and chain IDs	Constructor, Methods
WdkTokenAssetRegistry	Token-specific registry with id, symbol, address, and chain lookups	Methods
Token Asset Utils	Helpers for working with token assets	Uniswap Utilities

Types

BaseAsset

type BaseAsset = {
  id: string;
  chainId: string | number;
};

TokenAsset

type TokenAsset = BaseAsset & {
  address: string;
  symbol: string;
  name: string;
  decimals: number;
  isNative: boolean;
};

BaseAssetOptions

type BaseAssetOptions = {
  caseSensitive?: boolean;
};

BaseAssetFilter

type BaseAssetFilter<TSchema extends Object> = Partial<TSchema>;

Each array item is a partial match condition. Properties inside a single object are matched together, and multiple objects are evaluated as a union of conditions.

Errors

AssetRegistryError

new AssetRegistryError(message)

Parameters:

• message (string): Error message describing the registry failure

WdkBaseAssetRegistry

Generic registry class for storing and looking up assets in memory.

The default base registry validates the BaseAssetSchema shape (id and chainId) while preserving additional fields on registered assets. Override _assertAsset when a registry needs stricter validation or a richer schema.

Constructor

new WdkBaseAssetRegistry(...assets)

Parameters:

• ...assets (T[][]): One or more asset lists to preload into the registry

Example using a concrete token registry:

import { WdkTokenAssetRegistry } from '@tetherto/wdk-asset-registry'
import commonTokens from '@tetherto/wdk-asset-registry/assets/common-tokens'

const registry = new WdkTokenAssetRegistry(commonTokens)

Extend the base registry in TypeScript:

import { z } from 'zod'
import WdkBaseAssetRegistry, { BaseAssetSchema } from '@tetherto/wdk-asset-registry'

type CustomAsset = {
  id: string
  chainId: string
  label: string
}

const CustomAssetSchema = BaseAssetSchema.extend({
  label: z.string()
})

class CustomAssetRegistry extends WdkBaseAssetRegistry<CustomAsset> {
  _assertAsset (asset: CustomAsset): CustomAsset {
    return CustomAssetSchema.parse(asset)
  }
}

Methods

Method	Description	Returns
registerAsset(asset, [upsert])	Register a single asset	void
registerAssets(assets, [upsert])	Register multiple assets	void
getAssets()	Get all registered assets	T[]
getAssetById(id)	Get one asset by identifier	T | null
getAsset(filter, [opts])	Get assets using one or more partial match conditions	T[]

registerAsset

Register a single asset in the registry.

Parameters:

• asset (T): Asset definition to insert or replace
• upsert (boolean, optional): When true, replaces an existing asset with the same id

Returns: void

registerAssets

Register multiple assets in the registry.

Parameters:

• assets (T[]): Asset definitions to insert or replace
• upsert (boolean, optional): When true, replaces existing assets with the same id

Returns: void

getAssets

Get all registered assets.

Returns: T[]

getAssetById

Get a single asset by identifier.

Parameters:

• id (string): Asset identifier to look up

Returns: T | null

Example:

const asset = registry.getAssetById('eip155:1/0xdAC17F958D2ee523a2206206994597C13D831ec7')
console.log(asset)

getAsset

Get asset metadata using one or more partial match conditions.

Parameters:

• filter (BaseAssetFilter<T>[]): One or more partial asset match conditions. Within a condition, provided key-value pairs are matched with AND.
• opts (BaseAssetOptions, optional): Lookup options such as caseSensitive

Returns: T[]

Example:

const assets = registry.getAsset([
  {
    id: 'eip155:1/0xdAC17F958D2ee523a2206206994597C13D831ec7',
    chainId: 'eip155:1'
  }
])
console.log(assets)

WdkTokenAssetRegistry

Token-specific registry built on top of WdkBaseAssetRegistry<TokenAsset>.

Methods

Method	Description	Returns
getTokens()	Get all registered tokens	TokenAsset[]
getTokenById(id)	Get one token by id	TokenAsset | null
getTokenByAddress(address, [opts])	Get tokens by address	TokenAsset[]
getTokenBySymbol(symbol, [opts])	Get tokens by symbol	TokenAsset[]
getTokenByChain(chainId, [opts])	Get tokens by chain id	TokenAsset[]

getTokens

Get all registered tokens.

Returns: TokenAsset[]

getTokenBySymbol

Get token metadata by symbol.

Parameters:

• symbol (string): Token symbol to look up, such as usdt or usdt0
• opts (BaseAssetOptions, optional): Lookup options such as caseSensitive

Returns: TokenAsset[]

Example:

const assets = registry.getTokenBySymbol('usdt')
console.log(assets)

getTokenById

Get a single token by asset identifier.

Parameters:

• id (string): Token asset identifier to look up

Returns: TokenAsset | null

Example:

const asset = registry.getTokenById('eip155:1/0xdAC17F958D2ee523a2206206994597C13D831ec7')
console.log(asset)

getTokenByChain

Get token metadata by chain identifier.

Parameters:

• chainId (string | number): Chain identifier to look up
• opts (BaseAssetOptions, optional): Lookup options such as caseSensitive

Returns: TokenAsset[]

Example:

const ethereumUsdt = registry.getTokenByChain('eip155:1')
console.log(ethereumUsdt)

getTokenByAddress

Get token metadata by contract address.

Parameters:

• address (string): Token address to look up
• opts (BaseAssetOptions, optional): Lookup options such as caseSensitive

Returns: TokenAsset[]

Example:

const assets = registry.getTokenByAddress(
  '0xdAC17F958D2ee523a2206206994597C13D831ec7'
)
console.log(assets)

Token Asset Utils

Helpers for working with token assets.

Uniswap Utilities

Helpers for normalizing Uniswap Token Lists entries into TokenAsset.

Methods

Method	Description	Returns
fromUniswapToken(token)	Normalize one token-list entry into a TokenAsset	TokenAsset
fromUniswapTokenList(tokens)	Normalize a token array into TokenAsset[]	TokenAsset[]

fromUniswapToken

Convert one Uniswap-style token entry into a normalized TokenAsset.

Parameters:

• token (UniswapTokenInfo): Source token entry

Returns: TokenAsset

fromUniswapTokenList

Convert a Uniswap Token Lists tokens array into normalized TokenAsset[].

Parameters:

• tokens (UniswapTokenInfo[]): Source token entries

Returns: TokenAsset[]

Example:

const normalizedTokens = fromUniswapTokenList(
  source.tokens
)

JSON Schemas

Schemas	Description
BaseAssetJsonSchema	JSON Schema representation of a single BaseAsset object
TokenAssetJsonSchema	JSON Schema representation of a single TokenAsset object

🔒 Design Considerations

• No RPC Dependency: Pure metadata access
• Deterministic Lookups: Simple and predictable results
• Extensible Registry: Supports runtime registration and replacement of assets
• Composable: Designed to work alongside wallet/protocol modules (i.e. wdk-wallet-* and wdk-protocol-*)

🛠️ Development

Building

# Install dependencies
npm install

# Build TypeScript definitions
npm run build:types

# Lint code
npm run lint

# Fix linting issues
npm run lint:fix

Testing

# Run tests
npm test

# Run tests with coverage
npm run test:coverage

📜 License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

🆘 Support

For support, please open an issue on the GitHub repository.