[zherring]

Summary

• Adds a top-level Networks section to the nav, with an index page and an Arc page (/networks/arc).
• The Arc page covers what is deployed on Arc, SDK requirements, how the native and ERC-20 USDC token ids behave in Splits, Push vs Pull guidance, distributing and withdrawing, network notes, and a pre-transaction checklist.
• public/llms.txt gets a ## Networks section with entries for both pages. The markdown twins and llms-full.txt pick the pages up automatically from _meta.json.
• The introduction page's network list now names Arc and Robinhood Chain.

How the claims were checked

• Primary sources: contract source at tag splits-v2.2, and the @0xsplits/splits-sdk 6.7.0 package.
• Read-only eth_getCode, eth_call with state overrides, and eth_getLogs against Arc mainnet and testnet.
• Real transactions on Arc mainnet, described in "Mainnet test" below.
• Arc-owned facts (USDC native/ERC-20 views, fee requirements, duplicate Transfer logs) link to Arc's docs instead of being restated.

Mainnet test (2026-10-23)

The token-id behavior on the page was checked with real transactions on Arc mainnet, not only simulations. A throwaway wallet created four splits and ran each through fund, distribute and (for Pull) withdraw, using @0xsplits/splits-sdk 6.7.0 and viem. Each split had 3 recipients (50/30/20), no owner, a 0 distributor fee, and 0.1 USDC of principal. All transactions succeeded. Leftover funds were swept back afterwards.

Run	Split type	Funded by	distribute / withdraw id	Split address
1	Pull	ERC-20 transfer	0x3600…	0x7560aA123F217A1281A1F7D1b4f629c1f34CB5f5
2	Pull	native send	0xEeee…	0xb6d8F7BE383f2caAf24EC01853522C5D189eD130
3	Pull	native send	0x3600…	0xc79913251CF91c1c227d897f4057c9797259D829
4	Push	ERC-20 transfer	0x3600… (with splitFields)	0x7De8Ee7C00824Ab33B5de53c5b2c8F19A7740CB3

What the runs showed:

• Funding by either route is visible under both ids. After an ERC-20 transfer of 0.1 USDC (run 1), getSplitBalance returned 100000 under 0x3600… and 100000000000000000 under 0xEeee….
• distribute credits only the id you pass. Run 1 credited recipients' Warehouse balances under 0x3600… (49,999 / 29,999 / 19,999) and left 0xEeee… at 0. Run 2 credited only 0xEeee…, and the recipients' 0x3600… balances did not change. Run 3, funded natively but distributed under 0x3600…, matched run 1.
• withdraw pays the balance minus 1, per id. Run 1 paid 49,998 / 29,998 / 19,998 units. Run 2 (native id) paid 49999999999999998 / 29999999999999998 / 19999999999999998 wei, each 1 wei below the credited balance.
• A Pull split keeps more than 1 unit behind. In run 1, 6 of 100,000 units stayed in the contracts: 1 in the split, 2 in the split's Warehouse balance, and 1 in each recipient's Warehouse balance. The unit left in a recipient's Warehouse balance carries over: run 3 ran after run 1 and found 50,000 / 30,000 / 20,000 in the recipients' balances (49,999 / 29,999 / 19,999 newly credited, plus 1 each left from run 1), and withdrew 49,999 / 29,999 / 19,999.
• Push pays directly. Run 4 paid 49,999 / 29,999 / 19,999 units in the distribute transaction. splitFields skipped config recovery and worked in 6.7.0.
• Config recovery works on Arc. For all four splits, the SDK's log-based recovery rebuilt a config whose keccak256(abi.encode(config)) equals splitHash(), and updateBlockNumber() matched the block it read.
• Transfer logs depend on the route. ERC-20 transfers, and distribute or withdraw under 0x3600…, emitted two logs per move: one from 0xffff…fffE and one from 0x3600…. Native sends, and distribute or withdraw under 0xEeee…, emitted one, from 0xffff…fffE.
• Gas price. Runs 1 to 3 ran at 25 gwei and run 4 at 20 gwei. All transactions succeeded.

Not covered by the transactions, so these still rest on eth_call simulation: withdrawing under an id with no credit reverting, blocklisted and reverting recipients, owned splits (update and pause), and Push on the native id.

Safeguards in the harness: chain id 5042 only, an allowlist of signers, payees and calldata, a principal cap per invocation, and no automatic retries on broadcasts. The harness itself is not committed to this repo.

Transaction hashes (Arc mainnet, chain id 5042)

Run 1 (Pull, funded by ERC-20 transfer, id 0x3600…)

• createSplitDeterministic (pull): 0x44f0672c6635d19edd7c7e8bb16008b5ea8ad78f9aa7cb51342a046399d0e279 (148023 gas)
• fund 0.1 USDC via ERC-20 transfer on 0x3600: 0x8e1071ffbc04c7a1eeb1ebc3a6624a1195eb0079813649892680e1846dcbb5bd (48950 gas)
• distribute(token=0x3600 (0x3600), distributor=0x8caE3eaD2A22882c1a9A453414e8F5628aF53E4a): 0x11706e2843fdfb350047908a2557c8f769d318c732283197d27f81e8932ac3ae (205949 gas)
• withdraw owner=0x07413009D3e3780d4Bb0433e3Ad6Ec099463508A token=0x3600 (0x3600): 0x3daab51c17a9c4823981c18e45caa5b6fb7c0e64a0cc2306f0a39842c95fde8e (92926 gas)
• withdraw owner=0x71fd7Cb9Bb83DEA0A45a2069a6fF84be4F603D6e token=0x3600 (0x3600): 0x75eacd78035aa3628b9cf1226cd0e9829f8d8ec5ee564157853eed5dbdada050 (92926 gas)
• withdraw owner=0xBdfc1Ac87fa808dE4A27C05b31Eab40939951EB7 token=0x3600 (0x3600): 0x704ad6e0cce762b312634a230408600da3039f8ce5cc967e25127322073dd8cf (92926 gas)

Run 2 (Pull, funded by native send, id 0xEeee…)

• createSplitDeterministic (pull): 0xd5e5080fa2e9ed637d776fca9ebb61c87a62dee2cf208ae7da712c20f12e049e (148035 gas)
• fund 0.1 USDC via native value send: 0x340557ce1f15710121a05d7c5c21f3408350abeb7d93fc48f359c3b0cb4c89e2 (22038 gas)
• distribute(token=0xEeee (native), distributor=0x8caE3eaD2A22882c1a9A453414e8F5628aF53E4a): 0x796abd6c58d6f97006edd3d5957f4b76838e6208213809d96b95c488974861a3 (151536 gas)
• withdraw owner=0x07413009D3e3780d4Bb0433e3Ad6Ec099463508A token=0xEeee (native): 0x830e19dddf020cbf18574fdb59717455b6bfbab563c4fae45f4e811a6e0b3a90 (44746 gas)
• withdraw owner=0x71fd7Cb9Bb83DEA0A45a2069a6fF84be4F603D6e token=0xEeee (native): 0x6e8d9bacabeaefaffdb4b6f15384464a402c5bcc77d23e767629dca7e5d0ecad (44746 gas)
• withdraw owner=0xBdfc1Ac87fa808dE4A27C05b31Eab40939951EB7 token=0xEeee (native): 0xc238f8369e36585030be094d395f9f0fd7b141b31795127415c9eb643f6df436 (44746 gas)

Run 3 (Pull, funded by native send, id 0x3600…)

• createSplitDeterministic (pull): 0x84c908525d94663e0b67bb9bf866512bbb942d7279615345e260a8bcdc157d34 (148035 gas)
• fund 0.1 USDC via native value send: 0x6ebd2c1a74b369d55ce4dcf41bc01674bb1b43bd462cf873a4c9218b2badebf5 (22038 gas)
• distribute(token=0x3600 (0x3600), distributor=0x8caE3eaD2A22882c1a9A453414e8F5628aF53E4a): 0x1e109c863909d4b8200aa85d7a9629a9d1dfb52684bc7fff1ce0b37086ef7dc8 (154649 gas)
• withdraw owner=0x07413009D3e3780d4Bb0433e3Ad6Ec099463508A token=0x3600 (0x3600): 0x325614021e89f6ba432ab47f0379e67952aa931c9a12e09ace89f86debe7da18 (67926 gas)
• withdraw owner=0x71fd7Cb9Bb83DEA0A45a2069a6fF84be4F603D6e token=0x3600 (0x3600): 0x3c41b3eaf90553d69db6e1c25da21fdd325b08d6c25f5898880116b21b214b0b (67926 gas)
• withdraw owner=0xBdfc1Ac87fa808dE4A27C05b31Eab40939951EB7 token=0x3600 (0x3600): 0x883aecae305239985140823c1c0bdb25922d94e4a5ce3cd2ea2f83e43831a84c (67926 gas)

Run 4 (Push, funded by ERC-20 transfer, id 0x3600… (with splitFields))

• createSplitDeterministic (push): 0x12fd4a288390a9516387d31be6cd52b65a124e65d1b068563153cdc214108361 (147941 gas)
• fund 0.1 USDC via ERC-20 transfer on 0x3600: 0x55e432e5a65d55d3aacb4bc05a829e170f743782620526e09627c17a8025843c (48938 gas)
• distribute(token=0x3600 (0x3600), distributor=0x8caE3eaD2A22882c1a9A453414e8F5628aF53E4a) with splitFields: 0xe0070d94419bcb3fd034d8f74e0d61279491b0683e72c1fe40b922500530994b (112326 gas)

Deliberately not asserted

• Sub-20-gwei mempool-drop behavior: the page says Arc sets a minimum fee per gas and links to Arc's docs.
• Mainnet blocklist contents. The blocklist cases were observed with an address blocked on Arc testnet, and the page says so.
• Which token id the Splits app uses.

Notes for reviewers

• 0x3600...0000 is an upgradeable contract controlled by Circle/Arc, so USDC behavior described on the page can change.
• Line 5 of public/llms.txt is changed separately in Update llms.txt for protocols we support #104 and is intentionally not touched here.
• distribute accepts a splitFields argument in the SDK that is not in the SDK docs; the page mentions it.

Test plan

• pnpm build passes
• /protocol/docs/networks/arc renders with a "Networks" breadcrumb
• /protocol/docs/networks/arc.md twin has the tables

🤖 Generated with Claude Code

https://claude.ai/code/session_01WmTHDeVKp4PcqbpqhvBGME

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Project	Deployment	Actions	Updated
protocol-docs	Ready	Preview	Oct 26, 2026 3:32pm UTC