Miden ↔ Sepolia Bridge · AggLayer Bali

§01 · L1→L2 Deposit

Sepolia → Miden

✓ Full success 19m 31s

01Sepolia
deposit
02AggLayer
03AggKit
04miden-agglayer
05Miden Node
06Claim Note
07P2ID Note

0.001 ETH deposited from the bridge wallet on Sepolia, claimed and consumed by a v0.14.4 Miden account. Amount arrives as 100 000 miden-eth units (ETH × 10⁸, scale=10). Broadcast → claim committed in 19m 31s.

L1 side · Sepolia

Deposit tx: 0x9fdf66f3…e3a6b31a
Broadcast: 2026-04-24T11:58:38Z
Sepolia block: 0xa39dea · 10 722 282
Amount: 0.001 ETH

Destination · Miden

Miden addr: 0xd4f1cf38ec8c3210627fd2ea8fdde1
Eth-padded: 0x00000000d4f1cf38ec8c3210627fd2ea8fdde100
Account deploy tx: 0x5311b60b…49b16644
Faucet: 0xa88a59eb97990060612bc4a6c2f0dc

Claim pipeline

Global index: 18 446 744 073 710 679 266
L2 miden_tx (claim): 0xbcfabb1b…35666b8d1
L2 eth_tx (ClaimEvent): 0x7249ccf6…e9ff1e70
Claim note id (from log): 0xc5f6e556…d3a1d4c8
On-chain NoteId (from sync): 0x4ca2850b…f14ca82
L2 miden block (claim commit): 117 289

Consume · user absorbs the note

Consume tx: 0xdadb0540…af731717
Synced to block: 117 336

Result

Amount received: 100 000 miden-eth units
Scale check: 0.001 ETH × 10⁸ · scale=10 correct
Pipeline duration: 19m 31s
Status: ✓ Full success

§02 · L2→L1 Bridge-out

Miden → Sepolia

✓ Full success 1h 44m

01B2AGG Note
02miden-agglayer
03Aggsender
cert · LER
04AggLayer
05Sepolia

First-ever L2→L1 round-trip on AggLayer Bali. Pipeline: Miden burn → synthetic BridgeEvent → aggsender cert (InError → auto-retry → Settled) → claimAsset → dest EOA funded by exactly amount − gas. Broadcast 2026-04-24T14:06:33Z · Claim 2026-04-24T15:50:37Z. ~65m of the 1h 44m was Polygon-side settler nonce self-resolve; happy-path ≈ 30–45m.

L2 side · Miden

RPC: https://rpc.testnet.miden.io:443
Miden tx: 0xb645d24a…d5e6d75d · block 119 445
B2AGG note: 0xb96a3033…2fb408 CONSUMED
Wallet before: 10 000 Miden-ETH units
Wallet after: 0 (Δ −10 000 = −0.0001 ETH)
Faucet: 0xa88a59eb97990060612bc4a6c2f0dc

B2AGG note · decoded

Note id: 0xb96a30332145fda9124daa89a544f7680713d5f67a1b055cfa49657d032fb408
Status: CONSUMED · network note (consumed by the bridge's network account)
Note type: Public
Sender (Miden account): mtst1ar20rnecajxryyrz0lfw4r7auyur3qx3
Recipient (digest): 0x98c558811c93ca30a2bdca6520adcc5ea710ed63be2aa11a54171a76ba41352b
Nullifier: 0x184489a9834a2b74d67008a847476cbc698615684500efb50197a807db7b200f
Created at block: 119 447 · batch 1 · leaf 1024
note_tag / note_aux: 0 / 8 985 630 040 330 916 864 (0x7cb35ee9ed00d400)
Asset — faucet: 0xa88a59eb97990060 · mtst1az5g5k0tj7vsqcrp90z2dshsmskhyely
Asset — amount: 10 000 Miden-ETH units (= 0.0001 ETH · scale 10⁸)
Inputs (felt array): [0, 371240431, 1787337561, 4093345605, 2816662035, 665501604]
· input[0] — destNetwork: 0 (Ethereum / Sepolia)
· input[1..5] — destAddress: 5 × u32 LE → 0xEFAD2016599b886A457Ffbf313dae2a7A4bfaa27

How the inputs map. The five felts 371240431, 1787337561, 4093345605, 2816662035, 665501604 are the destination EVM address packed as 4-byte little-endian words. Concatenating them in LE byte order reconstructs the full 20-byte address — an exact match for the destinationAddress seen later in the claimAsset calldata on Sepolia. Same destination, same amount (10 000 miden-eth units → 10¹⁴ wei), round-trip verified.

Proxy · AggLayer synthetic log

Synth tx: 0xb5e2f477…035f483
Synth block: 119 451
Deposit count: 0 (first-ever L2→L1 on this deployment)
Amount: 100 000 000 000 000 wei (0.0001 ETH)
Dest network / addr: 0 / 0xEFAD2016…A4bfaa27
Global index: 309 237 645 312

Aggsender certificate · progression

14:24:01Z Pending 0x11d4d425…c12fb9
14:27:09Z (+3m 8s) Proven 0x11d4d425…c12fb9
14:32:09Z (+8m 8s) InError SettlementError: replacement transaction underpriced (settler EOA nonce collision)
~15:32Z (self-resolve) Pending (retry 1) 0x6e180f0b…46148e9
15:37:09Z (+5m 31s) Settled ✓ 0x6e180f0b…46148e9

PreviousLocalExitRoot: 0x27ae5ba08d7291c96c8cbddcc148bf48a6d68c7974b94356f53754ef6171d757
NewLocalExitRoot: 0xa822866a392d5d5226793db37c42ca4452d9d0d778702d0c5510f61eff5539da
Settlement tx (L1): 0xcd92fabb…cfe580 Sepolia block 10 723 771
AggLayer settler EOA: 0x3053c702…6c559a

L1 claim · Sepolia

Claimer EOA (pays gas): 0xEFAD2016599b886A457Ffbf313dae2a7A4bfaa27
Dest EOA (recipient): 0xEFAD2016599b886A457Ffbf313dae2a7A4bfaa27 (same — delta = amount − gas)
claimAsset tx: 0x391fa251…58c23c91 block 10 723 851
Receipt: success (0x1)
Gas used × price: 131 339 × 9 234 510 wei = 1 212 851 308 890 wei
ClaimEvent: addr 0x1348…d1f · topic0 0x1df3f2a973…fda4d (PolygonZkEVMBridgeV2.ClaimEvent)
bridge-api claim_tx_hash: 0x391fa251…58c23c91 populated
isClaimed on-chain: true

Balance check. L1 before 100 487 612 856 866 724 750 wei → after 100 487 711 644 015 415 860 wei.
Δ = +98 787 148 691 110 wei · expected (amount − gas) = +98 787 148 691 110 wei — exact match ✓

claimAsset · decoded calldata

Method: claimAsset(…) · selector 0xccaa2d11
To (bridge): 0x1348947e282138d8f377b467f7d9c2eb0f335d1f (PolygonZkEVMBridgeV2)
Value sent: 0 ETH (bridge pays out from its own balance)
Gas: 131 339 / 138 604 (94.76%)
globalIndex: 309 237 645 312 (0x4800000000)
mainnetExitRoot: 0xac981df484ac8603381d9ba74dc3b1822b251d764e273e63306489ee857361e8
rollupExitRoot: 0x396ab55a49c50815aa7864852c974bda179ebeace1fa5c7927bda366508870ba
smtProofLocalExitRoot: 32 × bytes32 (Merkle proof against mainnet exit root)
smtProofRollupExitRoot: 32 × bytes32 (Merkle proof against rollup exit root)
originNetwork: 0 (asset originates on L1 — it is native ETH being returned to Sepolia)
originTokenAddress: 0x0000000000000000000000000000000000000000 native ETH
destinationNetwork: 0 (Ethereum / Sepolia)
destinationAddress: 0xEFAD2016599b886A457Ffbf313dae2a7A4bfaa27
amount: 100 000 000 000 000 wei (0x5af3107a4000 · 0.0001 ETH)
metadata: 0x0920 (empty — no custom payload)

Reading the call. originNetwork = 0 + originTokenAddress = 0x0…0 tells the bridge this is native ETH returning home from the rollup, so it unlocks from its escrow balance rather than minting a wrapped token. destinationNetwork = 0 + destinationAddress → funds are released to 0xEFAD…bfaa27 on Sepolia. The globalIndex 0x4800000000 encodes the leaf position under the rollup exit tree, and the two 32-depth SMT proofs anchor the claim to the roots posted by the settlement tx.