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Developer Guide
  • Wallet SDK
    • Wallet Overview
    • Getting Started
      • 1. Start the RAILGUN Privacy Engine
      • 2. Build a persistent store for artifact downloads
      • 3. Load a Groth16 prover for each platform
      • 4. Add networks and RPC providers
      • 5. Set up a debug logger
    • Private Wallets
      • RAILGUN Wallets
      • View-Only Wallets
      • Encryption Keys
    • Private Balances
      • Balance and Sync Callbacks
      • Updating Balances
      • QuickSync
    • Transactions
      • Shielding
        • Shield ERC-20 tokens
        • Shield base token
        • Shield NFTs
      • Private Transfers
        • Private ERC-20 Transfers
        • Private NFT Transfers
      • Cross-Contract Calls
      • Unshielding
        • Unshield ERC-20 tokens
        • Unshield base token
        • Unshield NFTs
      • UX: Private Transactions
    • Broadcasters
  • Cookbook SDK
    • Cookbook Overview
    • Recipe Guide: Write a zkApp
      • "Step" — A smart contract call
      • "Recipe" — Steps in series
      • "Combo Meal" — 2+ Recipes
    • Use your zkApp privately
  • Engine SDK
    • Engine Overview
  • ZK Account Abstraction
    • Account Abstraction Overview
    • Getting started with the contracts
    • Wallets
    • State Structure
    • Example Primitives
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Shielding

How to shield tokens into a RAILGUN Wallet

Shield transactions are executed publicly, using a public wallet.

Under the hood, the shield action sends ERC-20 tokens into the RAILGUN contract, where they are associated with a RAILGUN Wallet and a private balance. Once shielded, the owning RAILGUN Wallet can initiate private transfers and cross-contract calls to interact with external smart contracts.

Shielding actions incur a 0.25% fee on the amount of tokens shielded. This fee rate is subject to change by RAILGUN DAO. After tokens are shielded, private transfers incur no fees.

NOTE: Do not shield rebase tokens into RAILGUN, as these are not supported. For a list of rebase tokens, see Rebase Token List (Coingecko).

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Last updated 1 year ago