Swaps on Robinhood Chain

SODAX swaps are intents, not bridges. Your user signs one transaction on Robinhood Chain that locks the input and declares what they want on the destination network. Solvers fill it; the SODAX relayer carries proof between Robinhood Chain, the hub (Sonic), and the destination. If nothing fills, the intent can be cancelled and funds recovered. From your side it is one SDK call. From your user’s side it is one wallet prompt, plus an approval the first time they swap an ERC-20 token.

What this looks like on Robinhood Chain

Source: the intent transaction is an EVM transaction on Robinhood Chain (chain ID 4663). ChainKeys.ROBINHOOD_MAINNET ('robinhood') identifies the network everywhere in the SDK.
Reach: any solver-compatible asset on any SODAX network is a valid destination, 166 assets today. The on-Robinhood Chain asset list only bounds what users hold on Robinhood Chain itself, not what they can swap into.
Tokens: ETH is the native gas token and uses the zero address in the SDK config. Every other asset, Stock Tokens included, is an ERC-20 token. Read addresses and decimals from the SDK config; never hard-code them.
Settlement: output lands on the destination network at dstAddress. Swaps into Robinhood Chain settle as ordinary token balances at the recipient’s address.

Approvals

swap() does not approve the input token for you. ETH is the native token and needs no approval. Every ERC-20 token does: the allowance is checked against SODAX’s asset manager on Robinhood Chain, so check it first and approve when it falls short.

const allowance = await sodax.swaps.isAllowanceValid({ params, walletProvider });
if (!allowance.ok) throw allowance.error;

if (!allowance.value) {
  const approval = await sodax.swaps.approve({ params, walletProvider });
  if (!approval.ok) throw approval.error;
  // wait for the approval to be mined before calling swap()
}

params is the same intent params object you pass to swap().

Quoting

The solver API quotes both directions:

const quoteResult = await sodax.swaps.getQuote({
  token_src: usdg.address,            // token on Robinhood Chain
  token_dst: usdc.address,            // token on the destination network
  token_src_blockchain_id: ChainKeys.ROBINHOOD_MAINNET,
  token_dst_blockchain_id: ChainKeys.ARBITRUM_MAINNET,
  amount: 100n * 10n ** BigInt(usdg.decimals), // 100 USDG
  quote_type: 'exact_input',          // the only supported quote type
});

getQuote deducts any configured partner fee before quoting, so quoted_amount is the net output the user actually receives.

Stock Tokens

The live config lists Robinhood Stock Tokens on Robinhood Chain for swaps, and marks each with isRwa: true. They are swap-only: none of them is in the money market list.

SDK support: @sodax/sdk 2.1.0 does not include them. Its config does not list them, so getQuote and swap reject a Stock Token address on 2.1.0. They are on main for the next release; until then, quote and swap the base assets on Robinhood Chain.
Token standard: Stock Tokens are standard ERC-20s with 18 decimals, issued by Robinhood Assets (Jersey) Limited, so they follow the same approval flow as any ERC-20.
Amounts are raw token amounts: Robinhood applies dividends and splits through an on-chain multiplier (uiMultiplier(), ERC-8056) that changes how many shares one token represents without changing balances. SODAX amounts are token amounts; apply the multiplier only when you display share counts.
Offer restrictions: Robinhood’s Stock Tokens documentation states that Stock Tokens may not be offered, sold, or delivered in the United States or to U.S. persons, and that offers and sales are restricted in other jurisdictions. Check those terms before you surface Stock Tokens in your product.

The Sonic vaults behind each Stock Token are listed under Robinhood Tokenized Equities.

Fees

Using SODAX is free to integrate. Two fees can apply to a trade:

Base fee: a fixed 0.1% of the input, taken by the protocol. Not configurable; compute it ahead of time with getSolverFee(inputAmount).
Your fee: optional platform fee on top, set by you and paid to you. It is the only fee you control. Configure it at SDK setup and check it with getPartnerFee(inputAmount). See Monetize SDK.

The user also pays Robinhood Chain’s network fee for the intent transaction, in ETH. It includes an L1 data fee for posting the transaction to Ethereum, which standard gas estimation already accounts for.

Executing

Prefer swap(). It creates the intent on Robinhood Chain, verifies it landed, submits it to the relay, waits for the packet on the hub, and notifies the solver. The Quickstart has the complete call. Track progress with getStatus(request), and cancel unfilled intents with cancelIntent. Limit orders (intents without deadlines) work from Robinhood Chain too, via createLimitOrder. Orchestrating manually with createIntent and submitIntent works the same as on any EVM network: Robinhood Chain intents need no relay extra data.

Error handling

Operations return Result<T> instead of throwing. The core methods (swap, createIntent, postExecution) return a typed SodaxError union you can switch on by error.code.

Full reference, including raw mode, limit orders, cancellation, and the complete error-code table: Swaps.

​What this looks like on Robinhood Chain

​Approvals

​Quoting

​Stock Tokens

​Fees

​Executing

​Error handling