bridge-monitor: tier-aware gas auto-topup - #1557
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- GAS_TOPUP_ENABLED defaults true (tier guard is the safety, not env flag) - CheckAndTopUp now takes tier param; canDivert = stableUSD - tier*1.20 - Gas check runs at every downgrade ladder rung (not just i==0) - Arb USDC->USDT fallback when primary has no balance - topUpChain returns bool; any failure propagates to allOK - spentToday per-chain daily cap, UTC day reset
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What
Reworks the native-gas auto-top-up system so it is safe and autonomous:
GAS_TOPUP_ENABLED=true). The tier guard — not an env flag — is the safety mechanism.canDivert = stableUSD - tier × 1.20. If below $5 minimum, sends a Slack alert and leaves the chain gas-blocked.FallbackStable=arbUSDTAddrso Arb ETH shortage still has a funding source.topUpChainnow returnsbool;CheckAndTopUpreturnsbool(false = at least one chain gas-blocked).spentTodaycap (UTC day reset), independent of the triangle rebalancer budget.Wallet context
Sol SOL = $0.75 (below $15 floor). Sol USDC = $248.82. At $50 ladder rung: canDivert = $248.82 - $60 = $188 → swap $25 USDC→SOL via LiFi/Jupiter same-chain swap. System handles this automatically.
Deploy
Bridge-monitor runs on VPS
ocb-par-main, not Railway. After merge to main: rsync harness source +docker build --no-cache ocb-bridge-monitoron the VPS.