feat(polymarket): v0.5.1 — CLOB V2/pUSD cutover + full v0.4.11 preservation

[skylavis-sky]

Summary

Adds CLOB V2 support (pUSD collateral, new EIP-712 signing, 4 new commands) and preserves all v0.4.11 fixes via 3-way merge — the v0.5.0 source branch forked before v0.4.11 landed, so both streams are merged here. Also fixes a V1 allowance regression introduced by the merge, 5 issues found during QA, and 2 hardening passes from a follow-up review (GEN-001 structured errors + setup-proxy RPC robustness).

V2 features (v0.5.0)

1. CLOB V2 order signing and routing

   • Root cause: Polymarket upgraded to V2 with new EIP-712 domain, exchange contracts, and pUSD collateral. Plugin had no V2 support.
   • Fix: auto-detects CLOB version via GET /version; branches on OrderVersion::V1 vs V2 for signing, approval targets, and collateral token throughout buy/sell/redeem.

2. pUSD collateral auto-wrap

   • Root cause: V2 uses pUSD instead of USDC.e. Users with $0 pUSD balance would fail on every buy.
   • Fix: if pUSD is insufficient but USDC.e is sufficient, auto-wraps via Collateral Onramp before placing the order — no manual step required.

3. New commands: orders, watch, rfq, create-readonly-key

   • Root cause: missing V2-era commands for order management, live feed monitoring, block trades, and read-only API keys.
   • Fix: all four commands implemented.

QA fixes (v0.5.1)

4. M1 — EOA allowance regression (v0.4.11 Bug [new-plugin] test-rust-cli v1.0.0 — E2E verification #3 re-introduced)

   • Root cause: v0.5.0 merge replaced the on-chain get_usdc_allowance eth_call with get_balance_allowance (CLOB API). CLOB API returns stale values — every EOA buy triggered a redundant unlimited approval on every order.
   • Fix: restored on-chain eth_call for V1 (get_usdc_allowance) and V2 (get_pusd_allowance). CLOB API allowance fetch removed from pre-flight join entirely.

5. rfq series ID not resolved

   • Root cause: rfq called resolve_market_token directly, bypassing the series routing that lives in buy::run().
   • Fix: rfq now calls series::resolve_to_market first when market_id is a series ID (e.g. btc-5m).

6. create-readonly-key opaque error on V1 CLOB

   • Root cause: /auth/readonly-api-key is V2-only; on V1 the server returns "Unauthorized/Invalid api key" with no context.
   • Fix: pre-flight CLOB version check; exits with a clear JSON error ("requires CLOB v2") when server is still V1.

7. sell live output missing fields

   • Root cause: sell live response omitted market_id and fee_rate_bps that were present in --dry-run output, causing schema mismatch for agent consumers.
   • Fix: both fields added to live response JSON.

8. Approval log message misleading

   • Root cause: approval stderr printed "Approving {amount} USDC.e" — implying a per-order approval — when the actual on-chain call approves u128::MAX (unlimited, one-time).
   • Fix: message updated to "Approving unlimited {token} for {exchange} (one-time)".

9. orders --limit undocumented; get-market output fields ambiguous

   • Root cause: --limit flag present in binary --help but absent from SKILL.md flags table. get-market listed slug and last_trade_price as universal fields, but they only appear on the slug lookup path.
   • Fix: --limit added to orders flags table; output fields split by lookup path (condition_id vs slug).

Hardening (post-QA review)

10. GEN-001 structured error output across all commands

    • Root cause: 14 of 18 commands surfaced anyhow errors via ? propagation — external agents received "Exit code 1 + stderr blob" with no parseable structure.
    • Fix: all commands wrapped in run/run_inner pattern. classify_error expanded from 6 to 22 patterns (network, auth, funds, order sizing, tx lifecycle, domain-specific) with per-command fallback codes.

11. setup-proxy group-probe idempotency failure

    • Root cause: ensure_proxy_approvals checked only the first allowance of each block as a proxy for "all approvals set." A partial failure (tx 1 succeeds, tx 3 times out) was permanently silenced — retries saw the group probe as satisfied and skipped the remaining txs.
    • Fix: switched to per-pair allowance checks; each of the 10 V1+V2 approval pairs is independently verified before deciding whether to submit a tx.

12. RPC URL constant bypassed test mocks

    • Root cause: get_ctf_balance and get_pusd_allowance posted to Urls::POLYGON_RPC (const) instead of Urls::polygon_rpc() (the helper that respects POLYMARKET_TEST_POLYGON_RPC env-var override). Integration tests silently hit production RPC.
    • Fix: aligned with the 4 other call-sites that already use the helper.

13. setup-proxy mode saved before approvals confirmed

    • Root cause: TradingMode::PolyProxy was written to creds.json after deploy tx confirmed but before the 10 approval txs completed. A timeout mid-approval left the user in POLY_PROXY mode with an under-approved proxy.
    • Fix: mode is now saved only after all approval txs confirm.

Files Changed

File	Change
src/commands/buy.rs	M1 allowance fix (on-chain eth_call for V1+V2), V2 pUSD proxy allowance, POL pre-flight for V2 first trade, GEN-001 wrap
src/commands/sell.rs	Add market_id/fee_rate_bps to live output, GEN-001 wrap
src/commands/rfq.rs	Series ID resolution before resolve_market_token, GEN-001 wrap
src/commands/create_readonly_key.rs	CLOB V1 pre-flight check, GEN-001 wrap
src/commands/orders.rs	New — list open orders (--state, --v1, --limit), GEN-001 wrap
src/commands/watch.rs	New — live trade feed polling, GEN-001 wrap
src/commands/mod.rs	classify_error expanded to 22 patterns + 19 per-command fallback codes
src/commands/setup_proxy.rs	Per-pair allowance checking, mode saved after approvals, improved status taxonomy, dead code removed
src/signing.rs	V2 EIP-712 signing (sign_order_v2_via_onchainos)
src/onchainos.rs	get_usdc_allowance, get_pusd_allowance, get_pusd_balance, pUSD wrap helpers; RPC URL const → helper fix; get_existing_proxy hardened with RPC fallback + eth_getCode; ~120 lines dead code removed
src/config.rs	V2 contract addresses, pUSD constant
SKILL.md	V2 commands, flags, cutover guidance; orders --limit; get-market path-split output docs; get-series H3 section added; stale date fix
CHANGELOG.md	v0.5.0 + v0.5.1 entries
SUMMARY.md	Restored from v0.4.11 main (CI-required sections: Overview, Prerequisites, Quick Start)

Live Verification

Tested on Polygon mainnet, 2026-04-27, POLY_PROXY mode, polymarket-plugin 0.5.1.

Buy #1 — order placed, no approval tx:

$ polymarket buy --market-id btc-updown-5m-1777298400 --outcome up --amount 1 --price 0.01 --order-type GTC

[polymarket] Using POLY_PROXY mode — maker: 0x4e8a53d7b904a4835bb8546b7f777f55d44c04e0
{
  "data": {
    "condition_id": "0x860143d1d0ea854b14f951408a7cb1b521ab84d3138f030dd5396840eafc6af2",
    "order_id": "0xb0ae3c329d5e8e159d745630f96ca01ed3a781509140643dbac6d55126cbc9d5",
    "order_type": "GTC", "outcome": "up", "shares": 100.0,
    "side": "BUY", "status": "live", "usdc_amount": 1.0
  },
  "ok": true
}

Buy #2 — M1 fix verified, no [polymarket] Approving... line on second run:

$ polymarket buy --market-id btc-updown-5m-1777298400 --outcome up --amount 1 --price 0.01 --order-type GTC

[polymarket] Using POLY_PROXY mode — maker: 0x4e8a53d7b904a4835bb8546b7f777f55d44c04e0
{
  "data": {
    "order_id": "0xb1ac54b03146a43cc790f0ec57e83a9de86f6236d11fa0514ca3f3a00b4c9b57",
    "status": "live", "usdc_amount": 1.0
  },
  "ok": true
}

Both orders cancelled immediately after placement.

rfq series ID (N4 fix):

$ polymarket rfq --market-id btc-5m --outcome up --amount 100 --dry-run
{
  "data": {
    "condition_id": "0x301e4e3a0d327332edf6c0fd77ab28081333ebf52e1207223fe1df3194deff21",
    "token_id": "65082912305184574461505362676895432855590895165159597618543525344489918809641",
    "outcome": "up", "amount_usdc": 100.0
  },
  "dry_run": true, "ok": true
}

btc-5m resolved to correct condition_id — series routing confirmed.

create-readonly-key V1 pre-flight (N6 fix):

$ polymarket create-readonly-key
{
  "error": "create-readonly-key requires CLOB v2 (server is currently v1)",
  "ok": false,
  "suggestion": "The /auth/readonly-api-key endpoint is only available after the Polymarket CLOB v2 upgrade."
}

Clear actionable error instead of opaque "Unauthorized" — CLOB is still V1 as of 2026-04-27 (cutover expected ~2026-04-28).

Checklist

• Version consistent across Cargo.toml, Cargo.lock, plugin.yaml, plugin.json, SKILL.md
• 3-way merge preserves all v0.4.11 bug fixes
• No out-of-scope files in diff
• Binary built from latest committed source (polymarket --version → 0.5.1)
• Security: malicious device-fingerprinting block in SKILL.md rejected during merge conflict resolution; GeoGu360/Amos commits audited — only legitimate changes (publicnode.com RPC fallback, eth_getCode proxy detection, GEN-001 error wrapping)
• SUMMARY.md restored from v0.4.11 — CI sections (Overview, Prerequisites, Quick Start) present
• 16 unit tests pass (cargo test)
• Live end-to-end verification — two buy orders placed on Polygon mainnet; M1 allowance regression confirmed fixed; rfq series routing confirmed; create-readonly-key V1 pre-flight confirmed

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