Class TradingApi

Build the on-chain swap calldata for a previously quoted route. The request is matched against the cached quote by quoteId (TTL ~30s); if the entry has expired, QUOTE_EXPIRED (40401) is returned, and if the request parameters disagree with the cached quote, SWAP_QUOTE_MISMATCH (40462) is returned.

Query multiple DEX vendors in parallel and return the priced routes sorted by toTokenAmount (descending). Each route carries an independent quoteId (TTL ~30s) that the swap endpoint consumes to construct calldata for the chosen route.

Return blockchain networks supported by the DEX aggregator. The supported list is dynamically configured server-side and may change over time. Pass binanceChainId to filter to a single chain; omit it to get the full list.

Build the on-chain transaction data needed to approve the DEX router to spend a user's ERC-20 token before a swap. Calldata is encoded per the ERC-20 ABI standard (approve() selector + spender + amount).

Query the settlement status of an RFQ order by its platform orderId (returned by POST /order/submit). Poll this endpoint until status reaches a terminal state: FILLED (settled on-chain) or FAILED (settlement failed).

Look up the on-chain status of a DEX swap by binanceChainId + txHash. Response semantics:

• Transaction not found: data is null (not HTTP 404).

• Transaction failed: status=failed with errorMsg; aggregator business fields (txType, dexRouter, fromTokenDetails, toTokenDetails) are null.

• Transaction succeeded: status=success with full token details when an aggregator event is present.

Submit a signed RFQ order to the backend for on-chain settlement via the corresponding vendor relayer. Only used when executionMode=RFQ (equity / RWA tokens such as Ondo and BStock).

Flow*: GET /quote → pick an RFQ route → GET /swap → sign rfq.typedDataToSign with EIP-712 (eth_signTypedData_v4) → call this endpoint → poll GET /order/{orderId} until FILLED or FAILED.

Idempotency*: Submitting with the same requestId within 30 minutes returns the original result without re-calling the vendor. Use a new UUID for each distinct order; reuse the same UUID when retrying.