Tokenizer

Tokenizer Protocol Documentation

Overview

The Tokenizer contract converts IP-NFTs (ERC-721) into fungible IPTokens (ERC-20), enabling fractional ownership of intellectual property. Each IP-NFT can be tokenized only once, and the resulting IPToken supply is managed by the IP-NFT owner.

Contract Details

Property	Value
Contract	Tokenizer v1.4
Type	UUPS Upgradeable Proxy
Pattern	Factory (EIP-1167 Clones)
Solidity	0.8.18
License	MIT

Deployments

• Ethereum Mainnet

  • Address: 0x58EB89C69CB389DBef0c130C6296ee271b82f436

  • Start Block: 17464363

• Sepolia Testnet

  • Address: 0xca63411FF5187431028d003eD74B57531408d2F9

  • Start Block: 5300776

How It Works

Tokenization Flow

Only IP-NFT owners can tokenize their IP-NFTs. Tokenization creates a new IPToken contract via minimal proxy (clone). Owners receive the initial token supply and can issue more tokens until calling cap().

Key Mechanics

• Tokenize IP-NFT: Creates a new IPToken.

• Attach IPT: Attaches an existing ERC-20 as IPToken.

• Issue Tokens: Issues more tokens; only uncapped tokens are issuable.

• Cap Tokens: Permanently caps the IPToken supply.

Functions

Write Functions

tokenizeIpnft

Creates a new IPToken from an IP-NFT.

Parameters:

• ipnftId (uint256): IP-NFT token ID

• tokenAmount (uint256): Initial token supply

• tokenSymbol (string): Token symbol

• agreementCid (string): IPFS CID of the legal agreement

• signedAgreement (bytes): Signed legal agreement

Returns: IPToken — Newly created IPToken contract address

attachIpt

Attaches an existing ERC-20 token as the IPToken.

Parameters:

• ipnftId (uint256): IP-NFT token ID

• agreementCid (string): IPFS CID of the agreement

• signedAgreement (bytes): Signed legal agreement

• tokenContract (address): ERC-20 token address

Returns: IIPToken — Wrapped IPToken for the existing ERC-20

issue

Issues additional IPTokens.

Parameters:

• ipToken (IPToken): IPToken address

• amount (uint256): Token amount to issue

• receiver (address): Receiver address

cap

Caps the IPToken supply, preventing further issuance.

Parameters:

• ipToken (IPToken): IPToken address

Read Functions

synthesized

Returns the IPToken address for a given IP-NFT ID.

Parameters:

• ipnftId (uint256): IP-NFT token ID

Returns: IIPToken — IPToken address or zero address if un-tokenized

controllerOf

Returns the current owner address of the IP-NFT.

Parameters:

• ipnftId (uint256): IP-NFT token ID

Events

• TokensCreated: Emitted when a new IPToken is created.

• TokenWrapped: Emitted when an existing ERC-20 is wrapped as an IPToken.

Security Considerations

• Each IP-NFT can only be tokenized once.

• IPToken control transfers automatically with IP-NFT ownership.

• Capping is irreversible and prevents further token issuance.

Resources

• Source Code: Tokenizer.sol

• ABI: Available in @moleculexyz/common/abis

• Audit: Audit Report

For further details and integration guidelines, consult the subgraph and other related documentation.