Cross-chain settlement is live on testnet, paying Base Sepolia (
eip155:84532) services from a Sui wallet. More destination chains are on the roadmap.The idea
The agent’s funds stay on Sui. When it pays a service on another chain, Tentacle Pay routes the payment through a dWallet — a wallet whose private key is split across Ika’s 2PC-MPC network, so no single party can sign for it. The dWallet produces a signature valid on the destination chain, funded by the USDC the agent pays on Sui.1
The agent holds one Sui wallet
A single Sui keypair with a stablecoin balance — the same wallet used for native Sui payments.
2
It pays in Sui stablecoins
To call a service on another chain, the agent pays USDC on Sui into the Tentacle Pay contract.
3
The dWallet signs for the destination
Ika’s MPC network signs the destination-chain payment authorization on the agent’s behalf.
4
The payment settles on the destination
The signed authorization is submitted to the destination chain, paying the service.
What it looks like in code
The agent registers the destination chain’s x402 scheme with a cross-chain signer. From there, paying is identical to a native x402 call:With the wallet
Thetpay wallet has cross-chain built in. When an agent pays a service on a supported destination chain, tpay routes it through the dWallet automatically — the agent still spends from its one Sui wallet.
Next steps
Quickstart
Make a cross-chain payment from a Sui wallet.
Architecture
dWallets, the verifier, and the on-chain protocol.