Disarmed. Arm Live Trade to broadcast operator-signed txs. Rust remains the engine bot. Never copy engine keys.

Timeboost observe

Express-lane auction is 60 s. Cockpit computes skip/bid economics for display. Submission is engine-only.

Current round

TIMEBOOST_AUCTION_ADDRESS=0x5fcb496a31b7AE91e7c9078Ec662bd7A55cd3079 · 2242 B

skip from this cockpit

47s

currentRound: 766135
reserve: 1000000000000000 wei
express head-start: 200 ms
auto-bid flag: engine on · desk skip

Doctrine

from control-plane snapshot

Do not set MEV_EXECUTOR=ts. Rust is the only capital-moving submitter. Cockpit does not sign, broadcast, or submit Timeboost.

Verified 2026-08-25

Live probe. currentRound advances. This desk never auctioneer_submitBid or timeboost_sendExpressLaneTransaction.

Surface	Official pin	Verified
ExpressLaneAuction	0x5fcb496a31b7AE91e7c9078Ec662bd7A55cd3079	codesize 2242, currentRound 766135, reservePrice 1e15 wei, 60s/15s/15s, bidding token WETH
Auctioneer	https://arb1-auctioneer.arbitrum.io/ · auctioneer_submitBid	JSON-RPC accepts the method (MALFORMED_DATA on an empty bid)
Reserve pricer	https://arb1-reserve-pricer.arbitrum.io/api/latest	live snapshot ~0.001 ETH
Express lane	timeboost_sendExpressLaneTransaction	already the engine/snipper method
Sequencer RPC	https://arb1-sequencer.arbitrum.io/rpc · queue 1024 · 12s	write-only (eth_chainId unavailable)
Sequencer feed	wss://arb1-feed.arbitrum.io/feed	default was the wrong host wss://arb1.arbitrum.io/feed

Official Timeboost (Arbitrum DAO)

sealed-bid second-price. Round 60s. Source https://docs.arbitrum.io/how-arbitrum-works/timeboost/how-to-use-timeboost (llms-full.txt). This desk never auctioneer_submitBid or timeboost_sendExpressLaneTransaction.

Pin	Value	Note
ExpressLaneAuction	0x5fcb496a31b7AE91e7c9078Ec662bd7A55cd3079	2242 B · currentRound 766135 · reserve 1e15 wei · 60s/15s/15s · WETH
Autonomous auctioneer	https://arb1-auctioneer.arbitrum.io/	auctioneer_submitBid · MALFORMED_DATA on empty bid · not this desk
Reserve pricer	https://arb1-reserve-pricer.arbitrum.io/api/latest	verified ~0.001 ETH · GET public
Sequencer RPC	https://arb1-sequencer.arbitrum.io/rpc	write-only · eth_chainId unavailable · queue 1024 · 12s
Sequencer feed	wss://arb1-feed.arbitrum.io/feed	official pin · old host wss://arb1.arbitrum.io/feed was wrong
How to use Timeboost	https://docs.arbitrum.io/how-arbitrum-works/timeboost/how-to-use-timeboost	canonical · UUID slug 404s
llms-full.txt	https://docs.arbitrum.io/llms-full.txt	4.1 MB dump · Timeboost + BoLD + sequencer
ToB Timeboost audit	https://docs.arbitrum.io/assets/files/2024_09_25_trail_of_bits_security_audit_timeboost_auction_contracts-2a8dbdf7b139db4224d30d6d1015aa85.pdf	2024-09-25 Trail of Bits · observational

01
Not this desk
Official Timeboost is engine-only. Cockpit never deposit/approve, never auctioneer_submitBid, never timeboost_sendExpressLaneTransaction.
02
Auction contract
TIMEBOOST_AUCTION_ADDRESS=0x5fcb496a31b7AE91e7c9078Ec662bd7A55cd3079. Bidding token is WETH. Sealed-bid second-price. Round 60s / close 15s / resolve 15s. currentRound 766135 (verified 2026-08-25). Reserve 1000000000000000 wei. This desk never bids.
03
Auctioneer
https://arb1-auctioneer.arbitrum.io/ method auctioneer_submitBid. Empty bid returns MALFORMED_DATA — method is live. EIP-712 domain ExpressLaneAuction v1. Not Kairos. This desk never submits.
04
Reserve pricer
GET https://arb1-reserve-pricer.arbitrum.io/api/latest before any bid. Also /api/recent (last two hours). This desk may observe; never bids.
05
Express lane
timeboost_sendExpressLaneTransaction is the engine/snipper method. Controller signs the request. Non-express delay 200 ms. Sequencer is write-only (eth_chainId unavailable). This desk never submits.

Kairos resources

Standard JSON-RPC · 50 req/s · payment is an EOA tip, not coinbase. This desk never binds KAIROS_RPC_URL and never timeboost_sendBundle.

KAIROS_PAYMENT_ADDRESS: 0x60E6a31591392f926e627ED871e670C3e81f1AB8

Endpoint	URL	Note
HTTP JSON-RPC mainnet	https://rpc.kairos-timeboost.xyz	50 req/s · KAIROS_RPC_URL pin · not this desk
WebSocket mainnet	wss://rpc.kairos-timeboost.xyz	same host as HTTP
Auction stream mainnet	wss://rpc.kairos-timeboost.xyz/ws/auction_events	round-timing subscribe · observe only
Optimistic RPC mainnet	https://optimistic-rpc.kairos-timeboost.xyz	needs X-Api-Key · engine env currently points KAIROS_RPC_URL here (misaligned) · this desk never sends
Sepolia HTTP sepolia	https://rpc-sepolia.kairos-timeboost.xyz	testnet · not chain 42161
Sepolia WS sepolia	wss://rpc-sepolia.kairos-timeboost.xyz	testnet · not chain 42161

Optimistic RPC spec

Permissioned parallel lane. Engine env currently points KAIROS_RPC_URL at optimistic-rpc (https://optimistic-rpc.kairos-timeboost.xyz). Standard pin remains https://rpc.kairos-timeboost.xyz. This desk never runs the curl and never holds X-Api-Key.

Engine env currently points KAIROS_RPC_URL at optimistic-rpc. Standard pin is https://rpc.kairos-timeboost.xyz. This desk never sets it, never sends X-Api-Key.

01
Not this desk
Optimistic submit is engine-only. Cockpit never eth_sendRawTransaction, never holds KAIROS_API_KEY, never sets X-Kairos-Payment.
02
Do not point KAIROS_RPC_URL here
Standard pin is https://rpc.kairos-timeboost.xyz (timeboost_sendBundle + in-bundle tip). Engine env currently points KAIROS_RPC_URL at optimistic-rpc — misaligned. This desk never sets it.
03
Headers (engine, if ever wired)
X-Kairos-Payment = bid amount in wei. X-Api-Key = key from Kairos team. Both required. Missing either drops the tx.
04
Method
Standard Arbitrum JSON-RPC eth_sendRawTransaction. Params: signed raw tx hex. This is not timeboost_sendBundle.
05
Tip is not the header on standard lane
Standard mode tips via explicit ETH transfer to KAIROS_PAYMENT_ADDRESS inside the bundle. Optimistic mode declares wei in X-Kairos-Payment. coinbase transfer pays nobody on Arbitrum.

curl https://optimistic-rpc.kairos-timeboost.xyz \
  -X POST \
  -H "Content-Type: application/json" \
  -H "X-Kairos-Payment: <amount-in-wei>" \
  -H "X-Api-Key: <api_key>" \
  --data '{
    "jsonrpc": "2.0",
    "id": "1",
    "method": "eth_sendRawTransaction",
    "params": ["0x..."]
  }'
# Observational example only. This desk never runs it. Never paste a live key.

Paper EV vs round

illustrative surplus — not a live bid