Transaction Details
| TX Hash | a21372bbe6a8745489d9551213637eb88791f32fde6df26a8cb41b4f942c72f2 |
| Block | 116,297 |
| Timestamp | Wed, 06 May 2026 22:42:12 GMT (3d ago) |
| Confirmations | 2,591 |
| Fee | 0.01908476 USDm |
| Size | N/A |
| Weight | N/A |
| Version | 9 |
Transaction Type
| Type | TRANSFER |
Inputs & Outputs
| Inputs | 1 |
| 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) | f3eb48708aff84fbfc9646e4bfd0ac299aa8a26decb204ce6a92016f35a9e0c8 |
| Pedersen Commitment (C) | 2077f4766aa3e31e97f23a3b9edb0ef5a1253ecf82e7bf6c8d7b5eb5075b5e69 |
| View Tag | 76 |
| Asset | ✓ USDm |
| Amount | Encrypted (Pedersen + Bulletproofs+) |
| Output #1 | |
| One-Time Key (O) | eb23dc285eb5567ea87f9918daff4ccca5885b77461e29c66263f699b02b8c3f |
| Pedersen Commitment (C) | 9ff2b644bacff4e9209242f11143ede63f991ac797ef7085ef626484ab3aa505 |
| View Tag | 60 |
| 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 | 1 |
| Proof Size | 4,544 bytes |
| Curve Tree | Helios (C2) dual-curve architecture |
| Tree Layers | 4 |
| Tree Root | e9f919f3bbc95626e43c7ad6e6f5efe9f61537af2f7ac584a3e1e54276a27860 |
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) | 82628e1c40573b824950ba972f923243817e44e699a15ec4fec333a86a055e08 |
| C̃ (Pseudo-output) | 3ecfd696cea1a8d8f1fafa5c664540ea35b554ec51c7cf6232a16f3849b112f4 |
| Pseudo-out (Balance) | 3a66f4f02812ba0f95752f06ef79eb5e7e9e8ca46989b0caae407b0bd88747c8 |
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)