DeFi

Security Token

Blockchain token representing a regulated financial security (equity, debt, fund share) subject to securities law. Requires KYC/AML, transfer restrictions, and regulatory reporting. On Solana, implemented with Token-2022's transfer hook and default account state extensions.

IDsecurity-token

Plain meaning

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Blockchain token representing a regulated financial security (equity, debt, fund share) subject to securities law. Requires KYC/AML, transfer restrictions, and regulatory reporting. On Solana, implemented with Token-2022's transfer hook and default account state extensions.

Mental model

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Think of it as a market mechanic used to price, route, or move capital through liquidity apps.

Technical context

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AMMs, routing, liquidity, lending, and trading infrastructure.

Why builders care

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Security Token (security-token)
Category: DeFi
Definition: Blockchain token representing a regulated financial security (equity, debt, fund share) subject to securities law. Requires KYC/AML, transfer restrictions, and regulatory reporting. On Solana, implemented with Token-2022's transfer hook and default account state extensions.
Related: Real-World Asset Tokenization (RWA), Token-2022 (Token Extensions), Transfer Hook, Default Account State
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Concept graph

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Branch

Real-World Asset Tokenization (RWA)

The process of representing ownership of traditional financial assets (treasuries, private credit, real estate, equities) as tokens on a blockchain. Tokenized RWAs grew from ~$6 billion in 2022 to over $30 billion by 2025, led by BlackRock's BUIDL fund (tokenized treasuries) and Maple Finance (private credit). RWAs bridge traditional finance with DeFi composability.

Branch

Token-2022 (Token Extensions)

The next-generation token program (TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb) that extends SPL Token with configurable extensions. Extensions include transfer fees, confidential transfers, transfer hooks, permanent delegate, non-transferable tokens, interest-bearing tokens, metadata, and more. Token-2022 is backwards-compatible with SPL Token for basic operations.

Branch

Transfer Hook

A Token-2022 extension that invokes a custom program on every token transfer. The hook program receives the transfer details and can enforce additional logic (royalties, compliance checks, transfer restrictions). The hook program address is set on the mint. Hooks execute via CPI and must conform to the Transfer Hook Interface.

Branch

Default Account State

A Token-2022 extension that sets the initial state of all new token accounts for a mint to either Initialized or Frozen. When set to Frozen, new token accounts are frozen by default and must be explicitly thawed by the freeze authority before they can receive or send tokens. Enables KYC/AML gating.

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DeFi

Real-World Asset Tokenization (RWA)

The process of representing ownership of traditional financial assets (treasuries, private credit, real estate, equities) as tokens on a blockchain. Tokenized RWAs grew from ~$6 billion in 2022 to over $30 billion by 2025, led by BlackRock's BUIDL fund (tokenized treasuries) and Maple Finance (private credit). RWAs bridge traditional finance with DeFi composability.

Token Ecosystem

Token-2022 (Token Extensions)

The next-generation token program (TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb) that extends SPL Token with configurable extensions. Extensions include transfer fees, confidential transfers, transfer hooks, permanent delegate, non-transferable tokens, interest-bearing tokens, metadata, and more. Token-2022 is backwards-compatible with SPL Token for basic operations.

Token Ecosystem

Transfer Hook

A Token-2022 extension that invokes a custom program on every token transfer. The hook program receives the transfer details and can enforce additional logic (royalties, compliance checks, transfer restrictions). The hook program address is set on the mint. Hooks execute via CPI and must conform to the Transfer Hook Interface.

Token Ecosystem

Default Account State

A Token-2022 extension that sets the initial state of all new token accounts for a mint to either Initialized or Frozen. When set to Frozen, new token accounts are frozen by default and must be explicitly thawed by the freeze authority before they can receive or send tokens. Enables KYC/AML gating.

Commonly confused with

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DeFiasset-backed-token

Asset-Backed Token

Token whose value is collateralized by a specific underlying asset held in reserve. Differs from algorithmic stablecoins in having a 1:1 real-world claim. USDC (fiat-backed), PAXG (gold-backed), and Ondo's USDY (treasury-backed) are examples.

DeFiliquid-restaking-token

Liquid Restaking Token (LRT)

A tokenized receipt representing restaked assets in protocols like EigenLayer, allowing users to maintain DeFi liquidity while earning restaking yields. When users restake LSTs via protocols like EtherFi (eETH) or Renzo (ezETH), they receive LRTs that can be used as collateral, traded, or deployed in additional DeFi strategies. LRTs reached $14 billion combined market cap by 2025.

AliasLRTAliasLiquid Restaking
DeFilp-token

LP Token

A token issued to liquidity providers representing their proportional share of a pool's reserves and accrued fees. LP tokens can be burned to withdraw the underlying assets. The value of LP tokens changes as the pool's token ratios shift and fees accumulate. LP tokens are often stakeable in yield farming programs for additional rewards.

Related terms

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DeFirwa-tokenization

Real-World Asset Tokenization (RWA)

The process of representing ownership of traditional financial assets (treasuries, private credit, real estate, equities) as tokens on a blockchain. Tokenized RWAs grew from ~$6 billion in 2022 to over $30 billion by 2025, led by BlackRock's BUIDL fund (tokenized treasuries) and Maple Finance (private credit). RWAs bridge traditional finance with DeFi composability.

Token Ecosystemtoken-2022

Token-2022 (Token Extensions)

The next-generation token program (TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb) that extends SPL Token with configurable extensions. Extensions include transfer fees, confidential transfers, transfer hooks, permanent delegate, non-transferable tokens, interest-bearing tokens, metadata, and more. Token-2022 is backwards-compatible with SPL Token for basic operations.

Token Ecosystemtransfer-hook

Transfer Hook

A Token-2022 extension that invokes a custom program on every token transfer. The hook program receives the transfer details and can enforce additional logic (royalties, compliance checks, transfer restrictions). The hook program address is set on the mint. Hooks execute via CPI and must conform to the Transfer Hook Interface.

Token Ecosystemdefault-account-state

Default Account State

A Token-2022 extension that sets the initial state of all new token accounts for a mint to either Initialized or Frozen. When set to Frozen, new token accounts are frozen by default and must be explicitly thawed by the freeze authority before they can receive or send tokens. Enables KYC/AML gating.

Web3kyc

KYC (Know Your Customer)

Identity verification procedures required by financial regulations that involve confirming a user's real-world identity through government-issued documents, proof of address, and sometimes biometric checks. Centralized exchanges and fiat on-ramp services typically require KYC before allowing trading or withdrawals. Most DeFi protocols on Solana are permissionless and do not require KYC, which is both a feature (accessibility) and a regulatory concern.

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DeFi

AMM (Automated Market Maker)

A protocol that enables token swaps using algorithmic pricing against pooled liquidity instead of matching individual buyers and sellers. AMMs use mathematical formulas (typically constant product x*y=k) to determine prices based on the ratio of tokens in a liquidity pool. On Solana, major AMMs include Raydium, Orca, and Meteora.

DeFi

CLMM (Concentrated Liquidity Market Maker)

An AMM design where liquidity providers concentrate their capital within specific price ranges instead of across the full 0-to-infinity range. CLMMs dramatically improve capital efficiency—LPs earn more fees per dollar deposited within their active range. If the price moves outside the range, the position becomes inactive. Orca Whirlpools and Raydium CLMM are leading implementations on Solana.

DeFi

Liquidity Pool

A smart-contract-held reserve of two or more tokens that enables trading via an AMM. Users deposit token pairs in specified ratios to become liquidity providers and earn trading fees. Pools are identified by their token pair and fee tier. Pool depth (total value locked) determines price impact for trades.

DeFi

LP Token

A token issued to liquidity providers representing their proportional share of a pool's reserves and accrued fees. LP tokens can be burned to withdraw the underlying assets. The value of LP tokens changes as the pool's token ratios shift and fees accumulate. LP tokens are often stakeable in yield farming programs for additional rewards.