UPAY3FOODInstall
08-proofs/2026-10-05-mainnet-shield

Proof · first confirmed Cloak shield on Solana mainnet

tags
#proof#proofs
date
2026-10-05
reading
1 min · 315 words
links
2 out · 7 in

Status: CONFIRMED

On 2026-10-05, UPAY3FOOD.agent completed its first real browser-wallet Cloak shield on Solana mainnet. The application reported SHIELDED and credited 1.000000 USDC to the private balance.

Receipt

Field Value
Network Solana mainnet-beta
Provider RPC Fast through the same-origin server proxy
Operation cloak-shield
Amount 1.000000 USDC
Wallet Phantom
Wallet address 9qAezschd4e5t5yi9F5SAw41g43Vuj6iYMh7dpcKqkUi
Signature 4xa8vKZLHQfZF6GzvK4SAqQwRrQUN9H7UBmT5cvnc6BKjiMdQ2RMJKnRVqgq7HtG4tAyUeFbcXjWXWfZ1v4asQfx
Slot 453687294
Confirmed at 2026-10-05T20:32:11.000Z
Cloak program zh1eLd6rSphLejbFfJEneUwzHRfMKxgzrgkfwA6qRkW
SDK @cloak.dev/sdk 0.2.5
Transaction path v0 + relay-funded supplemental ALT
Private balance after confirmation 1.000000 USDC

Explorer: https://solscan.io/tx/4xa8vKZLHQfZF6GzvK4SAqQwRrQUN9H7UBmT5cvnc6BKjiMdQ2RMJKnRVqgq7HtG4tAyUeFbcXjWXWfZ1v4asQfx

Execution path

Phantom
→ risk quote
→ relay-funded supplemental ALT
→ ALT warm-up
→ quote freshness checks
→ one transaction approval
→ v0 Cloak deposit
→ preflight + broadcast
→ confirmation
→ SHIELDED

The user-funded lookup-table fallback is blocked at three layers: SDK progress guard, wallet signer guard, and RPC transport guard.

Cost measured before broadcast

  • network fee: 130,000 lamports;
  • rent for the 3 Cloak accounts: 1,960,880 lamports;
  • estimated total wallet debit: 2,090,880 lamports;
  • recommended minimum balance: 3,241,120 lamports.

These are preflight measurements, not a claim about the final post-transaction wallet balance.

Privacy boundary

The shield transaction itself is public. Cloak protects the later relationship between that public deposit and a shielded withdrawal from the pool.

This proof does not claim that Pix is private, and it does not prove the full merchant settlement route. The licensed off-ramp / BRL / Pix leg remains disabled.

See Privacy Week and Payments architecture.

Repository convention

Successful externally verifiable milestones live in docs/08-proofs/. Failed attempts and investigations live in docs/incidents/.

Linked mentions 7