Omniston API v1beta8

What changed in Omniston v1beta8, how the API makes cross-chain settlement explicit, and where to find migration, SDK, and concept docs.

Omniston API support notice

Support for older Omniston API versions:

• v1beta6 — support ended on 1 June 2026

• v1beta7 — support ends on 1 September 2026

v1beta8 is the current version to use for supported integrations. If you are upgrading from v1beta7, continue with the v1beta7 → v1beta8 migration guide.

v1beta8 makes cross-chain settlement explicit in the API model. It uses RFQ, Quote, Order, Execution, Input position, and Output position to describe the swap lifecycle.

Instead of treating cross-chain settlement as a special case of trade tracking, v1beta8 separates source and destination blockchains, swap and order settlement, and execution-level state.

The core goal remains the same: get a competitive quote and settle. What changed is the protocol model around that flow.

The lifecycle is now described more explicitly as RFQ → Quote → swap or order settlement → executions and positions for orders, with clearer branching for intrachain settlement and HTLC-based cross-chain settlement. This helps clients branch earlier by settlement mode, flow type, and fee semantics.

The same terminology is now used across user-facing swaps, resolver operations, partner fees, and support runbooks.

Changes in v1beta8

• The package namespace is stonfi.omni.v1beta8.

• Cross-chain settlement is now represented directly in the lifecycle.

• RFQ, Quote, Order, Execution, and position concepts are defined explicitly.

• Swap settlement and order settlement are separate branches.

• Intrachain and HTLC-based cross-chain flows use different data shapes.

• Partner fees use integrator terminology and pips.

• ChainAddress and AssetId are separate concepts and should not share one validation path.

Core Terms

• Input asset / output asset and input / output amounts use the trader's perspective: what the trader sends and receives.

• Source blockchain and destination blockchain describe where the Input asset is provided and where the Output asset is delivered. For intrachain swaps, they are the same blockchain. For cross-chain swaps, they differ.

• Swap settlement and order settlement are the two main settlement branches in quote data: immediate routing for swap settlement, and an order with Executions for order settlement.

• Input position / Output position are protocol positions tied to an Execution in order settlement. Output position fields are used for HTLC-based cross-chain settlement and are not included in simple intrachain cases.

• ChainAddress and AssetId (stonfi.common.v1) are separate types. Addresses identify wallets, contracts, and positions. Asset IDs identify assets. Validation and storage should treat them differently.

• Integrator fees use integrator_address, integrator_fee_pips on the RFQ, and fee amounts in units on the quote: integrator_fee_units and protocol_fee_units. In v1beta8, one pip is 1/1,000,000 or 0.0001%. This replaces the older referrer and bps terminology.

• Gasless quotes may not include gas_budget and estimated_gas_consumption. Client code should not require these fields for every quote.

Supported Chains

Each supported blockchain has a fixed chain_id that identifies the chain where the input asset is provided or the output asset is delivered.

For the maintained operational matrix of chains, routes, and documented asset addresses by environment, use Overview (Omniston). The chain list below reflects the schema-level mapping described in this docs set.

TRON is listed for upcoming support and are not available yet.

Supported chains and chain_id values:

• 1 — Arbitrum (arbitrum)

• 2 — Avalanche C-Chain (avalanche)

• 3 — Base (base)

• 4 — BNB Chain (bnb)

• 5 — Ethereum (ethereum)

• 6 — Polygon (polygon)

• 7 — Robinhood Chain (robinhood)

• 50 — TON (ton)

• 60 — TRON (tron)

• 196 — X Layer (xlayer)

How to use this map:

• In SDK code, you usually select the chain by name in chain.$case. Those names map directly to the chain_id values above.

• EVM chains use EIP-55 addresses and currently support ERC-20 assets only. Native assets should be wrapped. ERC-1155 assets are not supported yet.

• TON uses a valid TON address string and supports native and jetton assets.

• The source-side AssetId and source-side ChainAddress must use the same chain.

• The destination-side AssetId and destination-side ChainAddress must use the same chain.

• Intrachain swaps use the same chain on both sides. Cross-chain swaps use different chains.

• Example: a base input asset must be paired with a base source address. A ton output asset must be paired with a ton destination address.

These terms are used across the docs, SDK examples, and resolver-facing APIs. Use them when naming internal fields, logs, dashboards, and support materials.

Integration Notes

If you are building a new app on top of v1beta8, the fastest path is:

1. read this page for chain and terminology rules

2. use Omniston Guide for the end-to-end flow

3. use How Omniston Works when you need a human-readable explanation of raw settlement-data fields, HTLC timing, or fee semantics

4. use React SDK or Node.js SDK for settlement-specific APIs

Protocol Support and Reference App Coverage

Protocol support and demo app coverage are not the same thing.

• The protocol supports all chains listed in the chain_id map above.

• The current public React reference app wires wallet and asset flows for TON, Base, and Polygon.

If a chain is supported in the protocol but not covered directly in the public demo app UX, follow the same AssetId and ChainAddress rules from this page and adapt the wallet layer for that chain.

Example Assets

The current docs and reference app use these example assets most often:

• ton USDT: EQCxE6mUtQJKFnGfaROTKOt1lZbDiiX1kCixRv7Nw2Id_sDs

• base USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

• polygon pUSD: 0xC011a7E12a19f7B1f670d46F03B03f3342E82DFB

Use them as tutorial/reference assets, not as a guaranteed liquidity registry. Resolver liquidity determines which pairs actually quote at a given moment.

Environments and Pair Discovery

Production and sandbox use the same chain_id map and the same SDK chain discriminators, but they can differ in which pairs actually quote at runtime.

Use these rules when choosing routes:

• if a chain appears in the supported chain_id map above, treat it as part of the documented API surface in both production and sandbox

• treat tutorial assets in this docs set as reference examples, not as a fixed environment-wide catalog

• do not assume that a pair available in production will also be available in sandbox, or vice versa

• this docs set does not publish a universal sandbox token registry or faucet list

• discover quoteable pairs in the target environment through RFQ first, then treat returned quotes as the source of truth

The most commonly referenced tutorial pairs in the current docs are:

• TON USDT -> Base USDC

• Base USDC -> TON USDT

• TON USDT -> Polygon pUSD

• Polygon pUSD -> TON USDT

Asset Metadata and RFQ Pricing

When building an integration on top of v1beta8, keep these roles separate:

• asset catalog / metadata: symbols, decimals, display names, token logos, and user-facing picker content

• executable pricing: the actual RFQ quote returned by Omniston for a specific route and amount

Practical guidance:

• this docs set does not define one universal Omniston endpoint for a cross-chain asset catalog

• for TON-side metadata, use the STON.fi API asset endpoints or @ston-fi/api

• for EVM-side metadata, use your own curated allowlist or backend catalog and map entries into Omniston AssetId

• for actual swap pricing, use Omniston RFQ as the source of truth rather than any static market price feed

• if your app shows indicative prices before the user commits, label them as non-executable and refresh the final trade decision from RFQ

For the full list of changes, see Migration guide: v1beta7 → v1beta8. For the canonical term list, see Glossary.

SDK Documentation

Recommended SDK docs:

• Omniston SDK

• Node.js SDK

• React SDK

• React SDK migration v0.7 → v0.8

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