The Locker feature enables users to lock ERC-20 or ERC-721 tokens on the Ink chain for a specified duration. Users can choose between a standard lock or a linear unlock (for ERC-20 tokens only) and select from a variety of lock durations. The system mints a proof-of-lock NFT to track locked tokens and supports advanced features like governance integration, lock extension, and ownership transfer.

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Supported Tokens

  • ERC-20 Tokens: Fungible tokens supported for both standard and linear unlock mechanisms.
  • ERC-721 Tokens [coming soon]: Non-fungible tokens (NFTs) supported for standard lock only.

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Locking Options

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Standard Lock

  • Tokens are locked for the entire selected duration.
  • Tokens are released in full upon the lock’s expiration.
  • Available for both ERC-20 and ERC-721 tokens.

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Linear Unlock (ERC-20 Only)

  • Tokens are gradually unlocked over time, proportional to the elapsed duration.
  • Users can withdraw available tokens at any time.
  • Example: For a 1-year linear unlock, after 6 months, 50% of the tokens are available for withdrawal.

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Lock Durations

Users can choose from the following lock durations:

  • 7 days
  • 14 days
  • 1 month
  • 3 months
  • 6 months
  • 9 months
  • 1 year
  • 2 years
  • 3 years
  • 4 years
  • Forever (permanent lock)

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Proof-of-Lock NFT

Upon locking tokens, a proof-of-lock NFT is minted to the user’s wallet.

This NFT tracks the locked tokens and their value, ensuring compatibility with wallet interfaces.

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Lock Management

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Extend Lock Duration

  • Users can extend an existing lock by selecting from the same durations listed in Lock Durations (#lock-durations).
  • The extension applies to the existing lock without requiring a new lock creation.

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Transfer Lock Ownership

  • Users can transfer ownership of a lock to another address.
  • This feature allows flexibility for users to delegate or reassign locked tokens.

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Emergency Unlocking

In case the web UI is unavailable, users can unlock or claim their tokens by interacting directly with the smart contract via a blockchain explorer. Follow these steps:

  • Navigate to the Ink chain explorer.
  • Locate the Locker contract address (available in the official documentation or support channels).
  • Interact with the contract’s unlock or claim functions, providing the necessary parameters (e.g., lock ID).
  • Ensure you have sufficient gas for the transaction.