transfer, transferFrom must respect the result of verifyTransferР”Р‡unction verifyTransfer(address _from, address _to, uint256 _amount) view public returns (bool success) Р”Р‡unction mint(address _investor, uint256 _amount) public returns (bool success) The implementation of verifyTransfer can take many forms, but the default approach is a whitelist controlled by the GeneralTransferManager. The verifyTransfer method will determine whether that transaction can be completed or not. ST-20 tokens must implement a verifyTransfer method which will be called when attempting to execute a transfer or transferFrom method. ST-20 tokens rely on Transfer Managers to determine the ruleset the token should apply in order to allow or deny a transfer, be it between the issuer and investors, in a peer to peer exchange, or a transaction with an exchange. ST-20 Interface Overview DescriptionР”Р„n ST-20 token is an Ethereum-based token implemented on top of the ERC-20 protocol that adds the ability for tokens to control transfers based on specific rules. Security token structure, distribution, or changes that could affect investors are now accessible to all via the blockchain. Security tokens offer the benefit of bringing significant transparency over traditional paper shares through the use of the blockchain and its associated public ledger. Such as having a stake in a company, real estate, or intellectual property can all be represented by security tokens. On the other hand, security tokens represent complete or fractional ownership in an asset (such as shares in a company, a real-estate asset, artwork, etc). Utility tokens give you that same type of access to a product or service. Utility tokens represent access to a network, and your token purchase represents the ability to buy goods or services from that network- Think of when you purchase a arcade token to allow you to play an arcade game machine. The concept of utility tokens is fairly well understood in the blockchain space today. While utility tokens have no limitations on who can send or receive the token, security tokens are subject to many restrictions based on identity, jurisdiction and asset category. Security tokens are designed to represent complete or fractional ownership interests in assets and/or entities. Introduction to Security Tokens What is a Security token?Р”Р„ Security Token shares many of the characteristics of both fungible (erc20) and non-fungible tokens (erc721). This system has a modular design that promotes a variety of pluggable components for various types of issuances, legal requirements, and offering processes. This particular repository is the implementation of a system that allows for the creation of ST-20-compatible tokens. This list is incomplete you can help by expanding it.The Polymath Core smart contracts provide a system for launching regulatory-compliant securities tokens on a decentralized blockchain. Examples of an achievement: manuscript, art show, music record, printed publication, film, invention, scientific discovery, major award, teaching contribution, business/military/state leadership. The notability of an achievement is determined by the fact of its presence in the respective Wikipedia article.With respect to this list a polymath listed here must have notable achievements within at least five out of thirteen subcategories, including at least one arts subcategory.'Other' subcategory may include additional activities, such as Computing, Agriculture or Sports. Non-related subject areas in this list identified by 13 subcategories, such as Visual Arts, Natural Sciences, Engineering. For instance, achievements in biology, chemistry and physics considered to be related, since all three belong to Natural Science area. This individual must have notable achievements within several DIFFERENT and NON-RELATED subject areas, typically in both arts and sciences. The criteria of who can be considered a world-class polymath needs to be strictly defined and use high standards so this list does not get too long.

Polymath symbol