SOST Deal Channels — Encrypted Coordination for OTC / P2P

⛔ SECURITY NOTICE — RETIRED: The affected HTLC atomic swap contracts have been retired following a security finding (H-01). Do not use these contracts or send funds to them. Public atomic swaps are not currently authorized. Reference: security advisory 2026-10-30, finding F-1 (published as H-01).

␀ Reframing — OTC / P2P. Trading PoPC staking contracts (buy/sell/split positions, sell reward rights) is disabled (POPC_DEX_ENABLED=false) in the current release (V30000); the signed-offer SOST-layer DEX is NOT ACTIVE (deferred / fail-closed on mainnet, see protocol-status.json) and admin-gated at consensus (S14 RESTRICTED DEVELOPER MODE) with public access disabled. PoPC is a non-tradeable native SOST bond — see PoPC Bond Staking. This surface is OTC / P2P coordination only (signed offers, encrypted deal channels); it provides no settlement, custody or security guarantee, and public atomic swaps are not currently authorized.

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Active Deals

End-to-End Encrypted: All messages are end-to-end encrypted. The relay cannot read content. Only timestamps, message types, and deal metadata are visible. Content is decrypted only by the participating parties.

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Encryption Details

Property	Detail
Key Exchange	X25519 Diffie-Hellman
Message Encryption	XChaCha20-Poly1305
Signing	ED25519 per message
Relay Knowledge	Timestamps and metadata only. Content is opaque to the relay.
Forward Secrecy	Per-session ephemeral keys derived from channel seed
Audit Trail	Signed message hashes recorded. Content not stored by relay.

PRIVACY GUARANTEE

All messages are end-to-end encrypted. The relay cannot read content.

Message types visible on the timeline (offer, accept, cancel, settlement_notice) indicate only the type of coordination step. The actual terms, prices, and identities within messages are encrypted and visible only to the two parties in the deal channel.

For the full E2E protocol specification, see E2E Protocol.