Midas · Midas customFeed family

mArb

mArb/USD

0xDf5B71c27A3639455B160e0D78D6D3248EA5a718

verdict SOURCE_STALEposting path GUARDEDliveness INIT_ONLYNAV INPUT_GAPconsumer action REVIEW

0 unchecked post(s) over the bound in force, posting path GUARDED, liveness INIT_ONLY, posting path replayed

Family: midas-customfeed
Chain: Ethereum mainnet (1)
Guard: deviation bound
bound scale: 0
kind: max_deviation
max answer: maxAnswer()
max deviation: maxAnswerDeviation()
min answer: minAnswer()
moves above threshold: 0
silences: 0
at bound posts: 0
clamped posts: 0
override flags: 0
reference moves: 0
unguarded reference moves: 0
Mechanism: CustomAggregatorV3CompatibleFeed: a Chainlink-shaped feed with a feed admin role. setRoundData checks only minAnswer <= value <= maxAnswer; setRoundDataSafe additionally requires deviation(last, value) <= maxAnswerDeviation (percent at 10^decimals scale) and, in the 2026-06 implementations, more than one hour since the last post.

Latest decision

REVIEW

INIT_ONLYPOLICY_SILENCEconsumer policy

INIT_ONLY: 0 unchecked post(s) over the bound in force, posting path GUARDED, liveness INIT_ONLY at block 25949464; bundle 9c34963ec326f7c6fb47d2ab5d0d77b5640c044a0033261b9610bd32454665ab

policy default: the threshold is the consumer's rule, not the feed's; the feed's own on-chain checks are reported in posting_path and the findings

run 20260910T205941Z · deployment QmeTCucCXDhT27pMMExg2EtDx1t7SA3Abgcw2p4BuZgmdQ · indexed block 25,949,534 · record c3f622493e7fd3478ab301a0a016cf0aba57b03990d279f1f65c6ff74089ef54 · consumer policy default · policy-default.json · sha256 84806934fd5b…2c1ab4 · 8 gates

Evidence bundle

root 9c34963ec326f7c6fb47d2ab5d0d77b5640c044a0033261b9610bd32454665ab

Download midas-run-25949464-20260910T205406Z.tar.gz 1657 KB, sha256 2b17b5ec3c4bfb649b349945c7016ad4dc873a41e417bbb4ebc7e580e13c3835

crossfoot verify midas-run-25949464-20260910T205406Z.tar.gz
# exit code 0: every file re-hashes to the root above and the verdict replays offline

Install the binary from the Crossfoot README; verify needs no key and no network.

Timeline

Focus or hover a round to print its transaction hash, answer, deviation and bound.

Rounds as a table

mArb rounds
Round	Date	Block	Path	Answer	Deviation %	Bound %	Finding	Transaction
1	2026-08-26 16:10 UTC	25,840,496	raw	1.00000000	not read	not read	UNGUARDED_POST	0x69bb34f778b987513914185132e9a99080aace509edc657c0858138e99c2c2f0

Bound history

No BOUND_CHANGED finding on this feed. Bound at the window block: 1.87 %.

Feed state at block 25,949,464

Kind: bounded
Latest round: 1
Latest answer: 1.00000000
Last post: 2026-08-26T16:10:35Z
Bound at block: 1.87 %
Decimals: 8

Findings

Findings
Kind	Block	Date	Transaction	Fields
UNGUARDED_POST	25,840,496	2026-08-26 16:10 UTC	0x69bb34f778b987513914185132e9a99080aace509edc657c0858138e99c2c2f0	round 1 path raw selector 0xa4381d1f value 1.00000000 classification initialization initialization true implementation 0xb871927485bb697c4c4ee17d1847a4e760e819da sender 0x9ba743471f8af2a951c69c400f7669ec1660cd0a note first successful post; the deviation guard is skipped when no round exists, so this is never a bypass

Posters

0x9ba743471f8AF2A951c69C400f7669eC1660cD0A

One key means one on-chain key.

Implementation eras

Implementation eras
Implementation	From block	Spacing rule	Source verified
0xb871927485bb697c4c4ee17d1847a4e760e819da	25,831,634	enforced (bytecode scan)	false