Open infrastructure for decentralized storage, verifiable AI compute, and on-chain governance.
SUM Chain is a Rust-built Layer-1 where Koppa is backed by real on-chain work, not just payments. Files are held under Proof-of-Retrievability, AI inference settles through verifier-signed attestations, and governance is code-backed and validator-respecting.
- 3s
- Block time
- ~18s
- Finality · depth 6
- 800B Ϙ
- Canonical supply
- 100% Rust
- Zero C/C++ deps
Live network
live mainnet params (reconnecting…)
- block_time_ms
- 3000
- 3s blocks
- finality_depth
- 6
- ~18s to finality
- min_fee
- 1000
- 0.000001 Ϙ minimum
- assignment_replication_factor
- 3
- chunk replicas
- Live on mainnet
SNIP V2 storage
enabled_from_height = 5,200,000
- Live on mainnet
OmniNode attestation
enabled_from_height = 6,000,000
- Live on mainnet
Inference settlement
enabled_from_height = 8,900,000
- Live on mainnet
Governance v1
enabled_from_height = 8,900,000
One settlement layer for storage and compute
SUM Chain verifies and records the work done off-chain: inference nodes compute against model shards held in archive/SNIP storage, and the chain settles the proof. Follow the path a request takes.
- 1
End user submits a prompt and pays a Koppa fee.
- 2
Job is dispatched to inference nodes.
- 3
Nodes fetch model shards from archive/SNIP storage. merkle_root
- 4
Archives hold shards under Proof-of-Retrievability challenges. PoR
- 5
A verifier signs the result; the chain records the attestation. InferenceAttestation
- 6
The verified response is returned to the user.
Proof-of-Retrievability, not promises
- Files are chunked and assigned to archive nodes by deterministic rendezvous hashing, three replicas by default.
- Archives answer periodic retrievability challenges with Merkle proofs. Valid proofs earn rewards from the file’s fee pool; expired challenges slash stake.
- Private files store encrypted key bundles and access metadata on-chain, the chain never encrypts raw file bytes itself.
- replication_factor
- 3
- challenge_interval
- 100 blocks
- lifecycle
- Pending → Active → Abandoned
- max_chunks / file
- 1,048,576
Inference, settled on-chain
- Users pay Koppa for inference; off-chain OmniNode workers perform the compute and a verifier signs the result.
- The verifier submits an InferenceAttestation, one per (session_id, verifier), permanently, which the chain records and finalizes.
- Read RPCs expose attestations and their status. Escrow-funded settlement (rewards/refunds) is active on mainnet (gate 8,900,000 reached); no bond slashing in v1.
- signing_domain
- omninode.inference_attestation.v1
- dedup
- one per (session, verifier)
- attestation
- active
- settlement
- active (gate 8,900,000 reached)
Record-first, validator-controlled
- SRC-20 token holders create proposals and vote with a balance snapshot frozen at proposal creation.
- Admin authority (asset registration, validator-cancel) is a validator quorum, not a single council address. Most classes are RecordOnly; the one on-chain auto-exec path is a TreasurySpend native payout from a configured treasury.
- Governance cannot force validator upgrades or mutate consensus, the validator set, or chain params. Active on mainnet: the gate at height 8,900,000 has been reached.
- model
- record-first approval
- authority
- validator quorum
- on-chain exec
- TreasurySpend only
- mainnet status
- active (gate 8,900,000 reached)
No automatic emissions, fee-funded validators
- 800,000,000,000 Ϙ canonical supply after the coordinated supply migration. No inflation and no mining or block rewards; future expansion requires on-chain consensus governance.
- Transaction fees are paid to the block proposer, so validators are funded by real network usage rather than new issuance.
- Koppa has nine decimals: 1 Ϙ = 1,000,000,000 base units, with a minimum fee of 1,000 base units.
- total_supply
- 800,000,000,000 Ϙ
- decimals
- 9
- min_fee
- 1000 base (0.000001 Ϙ)
- issuance
- none automatic; governance-only expansion
Tools and apps
A suite for users, developers, and operators, plus the SUMaillet product surfaces.
Get started in minutes
Start using Koppa
Open SUMaillet Web
Create a non-custodial wallet in your browser. No download, no extension.
Receive and send
Share your address to receive Ϙ. Prefer the terminal? The CLI wallet signs and sends from an encrypted keystore.
Track everything
Look up addresses, balances, and transactions in real time on the explorer.