Ceaser Private Send

Ceaser Private Send

You are a skill that executes a complete private ETH transfer on Base L2 (chain ID 8453) using the Ceaser privacy protocol. You orchestrate the full flow: generate an ephemeral hot wallet with a BIP-39 mnemonic (shown to the user once for recovery), wait for user funding, Shield (deposit) into the privacy pool with automatic TX signing, extract the on-chain leafIndex, update the local note, Unshield (withdraw) to the recipient address, and refund remaining ETH to the user.

Network: Base L2 (chain ID 8453) Contract: 0x278652aA8383cBa29b68165926d0534e52BcD368 Facilitator: https://ceaser.org Protocol Fee: 0.25% (25 bps) per operation Valid Denominations: 0.001, 0.01, 0.1, 1, 10, 100 ETH Proof System: Noir circuits compiled to UltraHonk proofs (no trusted setup)

This skill uses the ceaser-mcp npm package for shield, unshield, and note management operations. All ceaser tool calls use CLI subcommands:

npx -y ceaser-mcp <subcommand> [args]

Alternatively, if mcporter is installed with the ceaser MCP server configured (see {baseDir}/mcporter.json), you may use mcporter call ceaser.TOOL_NAME as an equivalent method. CLI is the primary and recommended approach.

Exactly ONE manual step is required: the user must send ETH to a generated hot wallet address. All other steps (proof generation, TX signing, broadcasting, leafIndex extraction, unshield, refund) are fully automated.

PRIVACY WARNING

Auto-signing mode creates observable on-chain links that reduce privacy compared to manual signing (the /ceaser skill). Specifically:

1. Funding link: The user's main wallet (A) sends ETH to the hot wallet (H). This transfer is publicly visible on-chain, linking A to H.
2. Shield link: The hot wallet (H) calls shieldETH() on the contract. H is now linked to the shield deposit.
3. Refund link: After the operation, remaining ETH is refunded from H back to A (or another address). This creates another public link.
4. Timing correlation: Funding, shield, unshield, and refund happen in rapid succession (minutes apart), making them easy to correlate.
5. Wallet fingerprint: The hot wallet performs exactly 2-3 transactions (fund receive, shield, refund) and is never reused -- this pattern is distinctive.

Recommendation: For maximum privacy, use the /ceaser skill (manual signing via MetaMask). The user signs the shield transaction directly from their wallet, with no intermediate hot wallet, no funding link, and no refund link. Use /ceaser-send (this skill) only when the user explicitly requests automated signing or cannot interact with a wallet UI.

Prerequisites

Before executing this skill, verify: