Add Robinhood Chain swap support

[j0ntz]

CHANGELOG

Does this branch warrant an entry to the CHANGELOG?

• Yes
• No

Dependencies

Companion PRs for the same chain (this PR is independent of both and passes CI standalone):

• EdgeApp/edge-currency-accountbased#1087 adds the robinhood currency plugin
• EdgeApp/edge-react-gui#6150 registers it in the app

Description

Maps the robinhood plugin id (Robinhood Chain, EVM chain 4663) onto each swap provider's own chain code, so quotes can route to and from the chain. No engine or plugin logic changes: lifi.ts, rango.ts and the central plugins all gate on a non-null MAINNET_CODE_TRANSCRIPTION lookup, so a chain the map does not know is invisible to the provider no matter what its API supports.

robinhood is added to src/util/edgeCurrencyPluginIds.ts via mapctl add-plugin; the six provider entries are authored in scripts/mappings/*Mappings.ts and the src/mappings/*.ts files are regenerated with npm run mapctl update-mappings.

Two of those generated files are hand-added here rather than regenerated. updateMappings in scripts/mapctl.ts iterates the synchronizer list, and changelly has a mapping file but no synchronizer while nexchange is hand-maintained with no source file at all, so the generator can never write either one. Both were missing exactly the robinhood key against every sibling, which docs/CHAIN_MAPPING_SYNCHRONIZERS.md says must be an explicit null so a later maintainer can tell a deliberate exclusion from a missed one. Making the sweep iterate the authored mapping files instead is left as follow-up work.

Provider	Chain code	Why
SideShift	robinhood	/v2/pair/btc-bitcoin/eth-robinhood and /v2/pair/eth-arbitrum/eth-robinhood both quote, in both directions
LI.FI	out	/v1/quote routes cross-chain into 4663. The key really is the string out, which is what /v1/chains returns for this chain
Rango	ROBINHOOD	Chain enabled with 495 tokens; quotes via Relay and GasZip
ChangeNow	hood	Native ETH, USDG, CASHCAT and tokenized equities. The native-ETH pair was inactive when first mapped and fills now
Swapuz	ROBINHOOD	Native ETH, USDG, CASHCAT, PONS, PIPEDOG. rate/ quotes 0.05 ETH into 0.04940 ETH on the chain, min 0.03402
LetsExchange	ROBINHOOD	CASHCAT and ARROW listed, no native ETH. info quotes 0.1 ETH into 1154.42 CASHCAT, min 0.06

Two providers are mapped without a fillable native-ETH pair at the time of mapping, on the same reasoning: the map is chain-level while fill availability is per-pair and dynamic. changenow.ts rebuilds chainCodeTickerMap hourly from exchange/currencies?active=true filtered to the chain codes the map knows, so an unmapped chain could never appear even once a pair activates. ChangeNow proved the point: the pair it was mapped ahead of fills today with no further change. LetsExchange is the same bet on tokens rather than gas, and costs a declined quote meanwhile, since checkWhitelistedMainnetCodes raises a plain SwapCurrencyError for a pair the provider cannot serve.

Every provider in the repo was probed against its own live discovery endpoint, not against documentation. ChangeHero, Exolix, Godex and n.exchange carry nothing on this chain and stay null. SwapKit's chain code appeared in an earlier sweep but is absent from its keyed provider list. Changelly and Xgram could not be probed: Changelly's API is request-signed, and the available Xgram key returns 401.

Two providers advertise the chain but are deliberately left unmapped: LetsExchange carries only CASHCAT and ARROW there (no native ETH, so it cannot deliver gas), and SwapKit's HOOD code turns up in the provider sweep with no tradeable asset behind it.

Testing

npm run test (56 passing), tsc, and verify-repo.sh all pass.

Exercised end to end on the iOS simulator with this branch served into the app, which is what the mapping is for. An exchange of 529.16 S from My Sonic to a Robinhood Chain wallet quoted 0.006243 ETH "Powered by LI.FI" and executed to the success scene; eth_getBalance for the receiving address then returned 6248511112300593 wei and the wallet rendered 0.006248511112300593 ETH.

That balance unblocked the send that the chain integration could not previously test: 0.001 ETH sent from the funded wallet is transaction 0x70e4950b5991c9419eff70ea2478c7ae55c5c58adcc3da237d5889394f8fdf62, success in block 35308086.

The route was pinned to LI.FI/Rango for the test by disabling competitors locally, because SideShift is geo-blocked from this host's egress; its mapping is verified against its live pair endpoint instead.

One unrelated gap this surfaced: Edge's rates server has no entry for robinhood, so ETH on the chain prices at $0 everywhere, and on the exchange scene that zero destination value trips the "High Price Impact" banner. Cosmetic, fixed where rates are configured rather than here.

Design doc: src/docs/robinhood-chain.md, section 7.

Asana: https://app.asana.com/0/1215088146871429/1217382370104887

---

Note

Low Risk
Additive mapping data verified against live provider APIs; mis-mapping would mainly affect quote availability rather than altering existing swap execution paths.

Overview
Adds robinhood as an Edge currency plugin id and wires Robinhood Chain (EVM 4663) into swap routing through chain-code mappings only—no quote or engine logic changes. Providers only see a chain when their src/mappings/*.ts entry is non-null.

Enabled on six partners with each provider’s own identifier: SideShift (robinhood), LI.FI (out), Rango (ROBINHOOD), ChangeNow (hood), Swapuz (ROBINHOOD), and LetsExchange (ROBINHOOD). Authoritative entries live in scripts/mappings/*Mappings.ts; most src/mappings/*.ts files are regenerated, with changelly and nexchange updated by hand to set robinhood → null like the other unsupported providers.

Every other swap partner in the repo gets an explicit robinhood → null mapping so the chain stays invisible where APIs do not support it. CHANGELOG records Robinhood Chain swaps via those six integrations.

^{Reviewed by Cursor Bugbot for commit 876a757. Bugbot is set up for automated code reviews on this repo. Configure here.}

[j0ntz]

📸 Test evidence: swap into Robinhood Chain, then send

lifi quote into robinhood

swap executed

hood wallet funded

send composed

send success

Captured by the agent's in-app test run (build-and-test).

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.

[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

Want fixes drafted automatically? Bugbot Autofix can create code changes for findings. A team admin can enable Autofix in the Cursor dashboard.

^{Reviewed by Cursor Bugbot for commit 876a757. Configure here.}

[cursor]

Swapter omits robinhood mapping

Low Severity

Adding robinhood to the plugin-id list updated every generated map and the hand-maintained changelly and nexchange files, but src/mappings/swapter.ts still jumps from ripple to rsk. That full matrix is supposed to carry an explicit null for a checked-unsupported chain so a later maintainer can tell a deliberate skip from a missed one.

 

^{Triggered by project rule: Bugbot Review Rules}

^{Reviewed by Cursor Bugbot for commit 876a757. Configure here.}