REST API

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May 2025

• Improved Cross-Chain Composability: Execute EVM swaps immediately following a Eureka cross-chain transfer, enabling more sophisticated multi-step routes.
• Enhanced Fee Transparency: Fees associated with Eureka operations are now clearly displayed within the estimated_fees array in API responses from the /v2/fungible/route endpoint, providing better cost predictability. For example:
  "estimated_fees": [
    {
      "fee_type": "SMART_RELAY",
      "bridge_id": "EUREKA",
      "amount": "76099736314413",
      "usd_amount": "0.20",
      "origin_asset": {
        "denom": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
        "chain_id": "1",
        "symbol": "WETH",
        "name": "Wrapped Ether"
        // ... other asset details (like decimals, logo_uri etc.)
      }
    }
  ]
  
  (See API Docs for full response structures from the /v2/fungible/route endpoint.)
• LayerZero and Stargate Integration: Expanded cross-chain capabilities with the integration of LayerZero and Stargate protocols. This integration adds support for a wide variety of new assets, including USDT, USDe, and ZRO. Usage:
  • REST API: Include "layer_zero" and/or "stargate" in the experimental_features array in your POST request to /v2/fungible/route.
    {
      "source_asset_denom": "uatom",
      "source_asset_chain_id": "cosmoshub-4",
      "dest_asset_denom": "uusdc",
      "dest_asset_chain_id": "noble-1",
      "amount_in": "1000000",
      "experimental_features": ["layer_zero", "stargate"]
    }
    
  • Client Library: Add these features to the experimentalFeatures parameter.
    import { route } from '@skip-go/client';
    
    const response = await route({
      sourceAssetDenom: "uatom",
      sourceAssetChainId: "cosmoshub-4",
      destAssetDenom: "uusdc",
      destAssetChainId: "noble-1",
      amountIn: "1000000",
      experimentalFeatures: ["layer_zero", "stargate"]
    });
    
  • Widget Integration: Add LayerZero and Stargate to the experimentalFeatures array in the routeConfig prop of the Skip Widget component.
    import { Widget } from '@skip-go/widget';
    
    <Widget
      routeConfig={{
        experimentalFeatures: ["layer_zero", "stargate"]
      }}
    />
    

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Status Endpoint Enhancement (Late May)

• Transaction Timestamp Information: Added on_chain_at field to individual transaction detail objects (such as send_tx, receive_tx, acknowledge_tx, execute_tx) found within the specific transfer type objects (e.g., ibc_transfer, cctp_transfer, axelar_transfer) in the status endpoint response. This field provides RFC3339 formatted UTC timestamps of when each specific transaction landed on its respective chain.

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April 2025

• Eureka Protocol Enhancements:
  • Native token wrapping (e.g., ETH to WETH) is now supported within Eureka cross-chain transfers, with improved fee handling for routes involving native ETH.
  • Eureka Protocol now officially supports transfers to and from Ethereum Mainnet and the Cosmos Hub.

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September 28, 2024

• Speed and performance improvements for /balances endpoint

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August 21, 2024

• Add /balances endpoint