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Overview

c8ntinuum uses IBC (Inter-Blockchain Communication) for trust-minimized cross-chain messaging. Unlike bridge protocols that rely on trusted intermediaries, IBC uses light-client verification — safety reduces to the security assumptions of the underlying chains’ consensus. c8ntinuum implements IBC v2 (Eureka) and exposes IBC functionality directly to Solidity via the ICS02 and ICS20 precompiles.
IBC v2/Eureka support is a network and release-level capability. Before building production cross-chain logic, confirm the target channel, client type, and enabled precompile behavior against the target c8ntinuum release and the Precompile ABI Reference.

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Key Components

Verifies the state of a counterparty chain using cryptographic proofs. Each client maintains a ClientState (parameters) and evolving ConsensusState snapshots. c8ntinuum also supports zk light clients for succinct verification.Access from Solidity via the ics02 precompile.
Standardized cross-chain token transfer protocol. Supports composable cross-chain payments and asset movement without application-specific bridging logic.Access from Solidity via the ics20 precompile.
  1. SendPacket — Application data committed on source chain
  2. RecvPacket — Destination verifies proof, executes OnRecvPacket
  3. Acknowledgement — Source verifies ack, finalizes or reverts
  4. Timeout — If deadline passes, source triggers rollback

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IBC from Solidity

c8ntinuum’s precompiles enable smart contracts to participate directly in IBC flows: 
// Pseudocode: import IICS20 and construct Height timeoutHeight per the ABI reference.
IICS20(0x0000000000000000000000000000000000000802).transfer(
    "transfer",
    sourceChannel,
    denom,
    amount,
    msg.sender,
    receiver,
    timeoutHeight,
    timeoutTimestamp,
    memo
);
Use Precompile ABI Reference for the exact Height struct, return value, events, and revert behavior.

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Trust Model

c8ntinuum’s IBC design avoids adding a privileged correctness third party. The trust model is:
  1. Source chain consensus — validators agree on the packet
  2. Light client verification — destination chain verifies source state
  3. zk light clients (where applicable) — succinct proofs for efficient cross-chain verification
This eliminates the single point of failure that bridge operator committees represent.