Transaction Details
| TX Hash | 842ee2030a4725043ff951272e7a0bf17ca3f13f2bef6770b5579de39ad85d0a |
| Block | 115,274 |
| Timestamp | Tue, 05 May 2026 23:11:24 GMT (1d ago) |
| Confirmations | 1,393 |
| Fee | 0.0246826 USDm |
| Size | N/A |
| Weight | N/A |
| Version | 9 |
Transaction Type
| Type | TRANSFER |
Inputs & Outputs
| Inputs | 2 |
| Outputs | 2 |
| Privacy Proof | FCMP++ (type 11 — Full-Chain Membership Proof over entire UTXO set; decoy rings are not used) |
Outputs
| Output #0 | |
| One-Time Key (O) | 88f2e9e1d2773113e9a7ae926f37ddab6e1803ff6b56c903e21d17fc5073c9f6 |
| Pedersen Commitment (C) | 0cfd5a251951c9544e223df04743e330c8b5cd22a71c89e6a06e995a00ee6810 |
| View Tag | 48 |
| Asset | ✓ USDm |
| Amount | Encrypted (Pedersen + Bulletproofs+) |
| Output #1 | |
| One-Time Key (O) | 2b2f1cbd3deff4c1c962fe7778994946e88d422c845d2a5e45c2b688332e829c |
| Pedersen Commitment (C) | 884d7d22346a4f03a8d8bc52dac1a40e356b02b0ed44ba1896fb58e066b5781d |
| View Tag | a9 |
| Asset | ✓ USDm |
| Amount | Encrypted (Pedersen + Bulletproofs+) |
Note: Actual amounts and sender/recipient addresses are private (FCMP++). Only the transaction structure is visible on-chain.
FCMP++ Proof Transcript
| Proof Type | FCMP++ Full-Chain Membership Proof |
| Anonymity Set | Entire Chain (all outputs ever created) |
| Inputs | 2 |
| Proof Size | 6,080 bytes |
| Curve Tree | Helios (C2) dual-curve architecture |
| Tree Layers | 4 |
| Tree Root | 1b5b86fd250d51c7108c7153c9143a9cd31bb0a6b69bfb5aa0ab75891333b0fd |
Curve Tree Structure
Layer 0 (Leaves) : Ed25519 output tuples (O, I, C) → Selene (C1) hashes Layer 1 (Interior) : Selene (C1) → Helios (C2) commitments Layer 2 (Interior) : Helios (C2) → Selene (C1) commitments Layer 4 (Root) : Helios (C2) tree root
The full output set is committed into a Helios/Selene curve tree. Each leaf encodes an output tuple (O, I, C) as Selene curve points. Interior nodes alternate between Helios and Selene curves, enabling efficient recursive proof composition.
Input 0 — Membership Proof
| Key Image (Nullifier) | 72ff3e96b04c38ccac03a306c3b0bc9d4fd99cb2e1b99344cf666855098000cd |
| C̃ (Pseudo-output) | 04c3952100007d7bb6f3289fd040bdd5c04611ab45cd2543245e37f714dafd5a |
| Pseudo-out (Balance) | 259fe504860a7f287c1bfee22fac125cfaefb8d5464573a0688292fb194989f8 |
Nullifier: The key image
KI = x · Hp(O) is a deterministic, unlinkable nullifier. It prevents double-spending without revealing which output is being spent.
Input 1 — Membership Proof
| Key Image (Nullifier) | 39dd0b7f18612bc9660dec3bc6a89db2ef0a7bcc8078cf6ed2ceefa2da46e3dd |
| C̃ (Pseudo-output) | 585cadaab8020943bc6fb5da02590573911f061f5ffb8b4819def0460ba05673 |
| Pseudo-out (Balance) | ff70e3b322077cfe683421121a6c8d6719e27df1606d3bcab8c67a764684af94 |
Nullifier: The key image
KI = x · Hp(O) is a deterministic, unlinkable nullifier. It prevents double-spending without revealing which output is being spent.
Spend-Auth & Linkability (SAL) Proof
ÕRerandomized one-time key
ĨRerandomized linking tag
RRerandomization scalar
C̃Rerandomized Pedersen commitment
The SAL proof demonstrates knowledge of the secret spend key, correct key image formation, and that the balance equation holds: Σ pseudo-outs = Σ output commitments + fee.
Verification Pipeline
1Deserialize FCMP++ proof from transaction
2Extract tree root (Helios (C2)), layers, key images
3Reconstruct signable hash from tx prefix
4Verify Generalized Bulletproofs+ arithmetic circuit
5Verify Helios/Selene curve tree membership (per input)
6Verify SAL proof (spend authorization + linkability)
7Check key image uniqueness (double-spend prevention)
✓Consensus acceptance
Privacy Guarantees
Anonymity SetEntire chain
Sender PrivacyHidden among all outputs
Amount PrivacyPedersen + Bulletproofs+
Receiver PrivacyStealth addresses
Double-SpendDeterministic nullifiers
Curve CycleHelios (C2) ↔ Selene (C1)