Limitations for the l2 migrated chain

[StanislavBreadless]

What ❔

Ensure that the gateway-migrated chain does not certain unneeded abilities

Why ❔

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.

[github-actions]

Changes to gas cost

Generated at commit: 93160681d57cd80b11e352265522747d3e6af7ff, compared to commit: df1c5c8576133acd9531cbd36987c201e7284926

🧾 Summary (100% most significant diffs)

Contract	Method	Avg (+/-)	%
DummyBridgehubSetter	addToken removeStateTransitionManager setHyperchain setSTM	-1 ✅ -9 ✅ +1 ❌ +1 ❌	-0.00% -0.04% +0.00% +0.00%
AdminFacet	changeFeeParams setTokenMultiplier setTransactionFilterer	+15 ❌ +22 ❌ +15 ❌	+0.17% +0.08% +0.12%
DiamondProxy	changeFeeParams setTokenMultiplier setTransactionFilterer	+15 ❌ +22 ❌ +14 ❌	+0.04% +0.04% +0.03%
MerkleTest	calculateRoot(bytes32[],uint256,bytes32)	0 ➖	0.00%

---

Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
DummyBridgehubSetter	3,899,764 (0)	addStateTransitionManager addToken proveL1ToL2TransactionStatus proveL2LogInclusion removeStateTransitionManager setHyperchain setPendingAdmin setSTM	23,875 (0) 24,134 (0) 0 (0) 0 (0) 23,863 (+12) 111,406 (0) 26,052 (0) 44,186 (0)	0.00% 0.00% +∞% +∞% +0.05% 0.00% 0.00% 0.00%	41,136 (-2) 36,591 (-1) 1,409 (+4) 1,513 (+7) 25,501 (-9) 111,444 (+1) 37,986 (-9) 44,224 (+1)	-0.00% -0.00% +0.28% +0.46% -0.04% +0.00% -0.02% +0.00%	47,566 (0) 36,872 (+6) 996 (-9) 1,111 (-3) 25,861 (0) 111,466 (+12) 37,962 (0) 44,246 (+12)	0.00% +0.02% -0.90% -0.27% 0.00% +0.01% 0.00% +0.03%	47,566 (0) 47,609 (0) 3,661 (+7) 3,895 (0) 26,318 (0) 111,466 (0) 49,872 (0) 44,246 (0)	0.00% 0.00% +0.19% 0.00% 0.00% 0.00% 0.00% 0.00%	3,584 (0) 1,536 (0) 512 (0) 512 (0) 2,048 (0) 768 (0) 512 (0) 768 (0)
AdminFacet	3,282,601 (+64,285)	changeFeeParams setTokenMultiplier setTransactionFilterer	4,720 (0) 28,877 (+22) 2,686 (0)	0.00% +0.08% 0.00%	9,027 (+15) 28,877 (+22) 12,591 (+15)	+0.17% +0.08% +0.12%	5,039 (+22) 28,877 (+22) 8,994 (+22)	+0.44% +0.08% +0.25%	17,323 (+22) 28,877 (+22) 26,094 (+22)	+0.13% +0.08% +0.08%	3 (0) 30 (0) 3 (0)
DiamondProxy	2,456,702 (0)	changeFeeParams setTokenMultiplier setTransactionFilterer	34,064 (0) 57,501 (+22) 31,411 (0)	0.00% +0.04% 0.00%	38,365 (+15) 57,501 (+22) 41,303 (+14)	+0.04% +0.04% +0.03%	34,380 (+22) 57,501 (+22) 37,700 (+22)	+0.06% +0.04% +0.06%	46,651 (+22) 57,501 (+22) 54,800 (+22)	+0.05% +0.04% +0.04%	3 (0) 30 (0) 3 (0)
MerkleTreeNoSort	534,636 (0)	getProof	32,953 (0)	0.00%	33,180 (+1)	+0.00%	33,193 (0)	0.00%	33,215 (0)	0.00%	273 (0)
MerkleTest	468,218 (0)	calculateRoot(bytes32[],uint256,bytes32)	606 (0)	0.00%	2,922 (0)	0.00%	2,943 (0)	0.00%	2,998 (+11)	+0.37%	261 (0)
DummyHyperchain	3,204,243 (+51,601)
MailboxFacet	3,008,460 (+51,679)

[github-actions]

Coverage after merging sb-limitations-for-the-l2-migrated-chain into kl/sync-layer-reorg will be

89.26%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
../da-contracts/contracts
RollupL1DAValidator.sol	67.11%	50%	83.33%	73.91%	134, 137, 137, 137, 139, 170, 172, 25, 25, 25–26, 26, 26, 28, 30–31, 35–36, 59, 61, 61, 61–62, 64
contracts/bridge
BridgeHelper.sol	100%	100%	100%	100%
L1AssetRouter.sol	95.81%	89.29%	97.37%	98.40%	129, 144, 201, 258, 311, 363, 498, 515, 536, 719–720, 855
L1ERC20Bridge.sol	100%	100%	100%	100%
L1NativeTokenVault.sol	96.12%	97.62%	84.62%	97.30%	252, 257, 45
contracts/bridgehub
Bridgehub.sol	75.61%	46.05%	85.71%	89.63%	103, 109, 114, 114, 153, 182–183, 183, 183–184, 184, 184, 186–187, 187, 187–188, 279–282, 284–286, 288, 316, 370–371, 373, 373, 373, 416, 424–425, 428, 428, 428–429, 451, 489, 513–514, 593, 596–597, 601–602, 629–630, 635–636, 664, 669, 93, 98
MessageRoot.sol	91.38%	61.54%	100%	100%	156, 162, 69, 76, 94
STMDeploymentTracker.sol	79.49%	50%	90%	94.12%	110, 114, 31, 38, 61, 88, 91
contracts/common
ReentrancyGuard.sol	100%	100%	100%	100%
contracts/common/libraries
DataEncoding.sol	80%	100%	100%	66.67%	72, 80
DynamicIncrementalMerkle.sol	74.42%	100%	80%	72.22%	67–70, 72–74, 76–78
FullMerkle.sol	100%	100%	100%	100%
L2ContractHelper.sol	55.88%	30%	60%	68.42%	29, 32–33, 46–47, 47, 47, 49, 49, 49, 56, 86, 90
Merkle.sol	73.85%	68.18%	75%	76.92%	52–53, 53, 53–54, 54, 54–55, 55, 55, 57–59, 62, 65, 83
MessageHashing.sol	100%	100%	100%	100%
SemVer.sol	100%	100%	100%	100%
UncheckedMath.sol	100%	100%	100%	100%
UnsafeBytes.sol	100%	100%	100%	100%
contracts/governance
ChainAdmin.sol	22.22%	20%	33.33%	20%	16, 28–29, 38, 38, 38, 40, 42–43, 43, 46, 49
Governance.sol	99.07%	96.77%	100%	100%	44
contracts/state-transition
StateTransitionManager.sol	70.48%	48.57%	57.14%	83.33%	103, 130–132, 136, 189, 232, 239, 257, 263, 270, 282, 289, 296, 304, 311, 319, 326, 335, 335, 335–336, 349, 351, 417, 431, 434, 449, 454, 473, 73, 78, 84, 84
TestnetVerifier.sol	77.78%	66.67%	100%	75%	16, 32
ValidatorTimelock.sol	98.57%	100%	100%	97.67%	236
Verifier.sol	89.88%	35.71%	96.30%	90.93%	1673–1674, 287–302, 305–308, 311–318, 321–328, 331–332, 335–336, 339, 384–385, 395–396, 406–407, 417–418, 428–429, 444–445, 454, 454–455, 904–905
contracts/state-transition/chain-deps
DiamondInit.sol	88.24%	70%	100%	100%	33–37, 63
DiamondProxy.sol	80.77%	62.50%	100%	88.24%	16, 16, 16–17, 27
contracts/state-transition/chain-deps/facets
Admin.sol	81.61%	54.35%	86.36%	92.45%	107, 119, 119, 119–121, 147, 147, 147–148, 148, 148, 150, 171, 217–218, 220, 233–234, 240, 259–260, 265, 302, 312, 316, 39, 39, 95
Executor.sol	78.44%	72.81%	81.25%	81.61%	107, 167, 171–172, 172, 172–173, 173, 173, 184, 184, 188, 188, 188, 206, 220, 231, 234, 279, 279, 279, 282, 285, 287–288, 294–295, 314–317, 319, 36, 368, 368, 368–371, 373, 376, 379–380, 389, 405, 408–409, 411–413, 424–426, 446, 487, 494, 513, 518, 527–528, 579, 604–605
Getters.sol	83.19%	66.67%	84.09%	84.85%	104, 107, 113, 116, 127, 130, 172, 223, 229, 233, 64, 79, 84
Mailbox.sol	57.87%	47.22%	57.14%	61.40%	107, 115, 131–132, 132, 132, 134–135, 143–145, 156, 167–168, 170–171, 173, 178, 182, 182–184, 184, 184–185, 188, 188, 188, 191, 193–194, 196, 201, 203, 206–207, 212–215, 218–219, 236, 242, 242, 242, 250, 255, 282, 311–312, 389, 400, 406, 52, 52, 545, 545, 545–546, 566, 75, 85
ZkSyncHyperchainBase.sol	82.14%	78.57%	85.71%	85.71%	48, 56, 56, 56
contracts/state-transition/data-availability
CalldataDA.sol	100%	100%	100%	100%
CalldataDAGateway.sol	85.71%	66.67%	100%	100%	27–28
RelayedSLDAValidator.sol	96.67%	83.33%	100%	100%	94
contracts/state-transition/libraries
Diamond.sol	94.81%	86.49%	100%	97.73%	110, 112, 114, 116, 119, 184, 294
LibMap.sol	100%	100%	100%	100%
PriorityQueue.sol	100%	100%	100%	100%
PriorityTree.sol	97.62%	80%	100%	100%	80
TransactionValidator.sol	97.18%	94.12%	100%	100%