> For the complete documentation index, see [llms.txt](https://timechain.gitbook.io/neucron/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://timechain.gitbook.io/neucron/networks-and-assets/asset-protocols-and-types.md). # Asset Protocols & Types An asset on Neucron is defined by two choices: the **asset type** (what it represents economically) and the **protocol** (the token standard that governs it on a given rail). This page explains both, and when each combination is the right one. ## Asset types ### Native tokens Every rail has a native token used for gas, transaction fees, and network collateral: BSV on BSV, ETH on Ethereum and several L2s, POL on Polygon, BNB on BNB Chain, AVAX on Avalanche, TRX on Tron, ADA on Cardano, and so on. On live rails, native tokens can be held and transferred through the wallet API today. Your integration needs them mainly for gas management, settlement, and fee budgeting. ### Stablecoins Fiat-referenced tokens used for settlement, treasury, and payouts. The relevant set for fintech products: * **USDC**: widely distributed USD stablecoin across EVM rails. * **USDT**: widely used USD stablecoin across multiple rails. * **USDY**: tokenized yield-bearing USD product. * **PYUSD** (PayPal USD): USD stablecoin with consumer-payment distribution. * **RLUSD** (Ripple USD): USD stablecoin issued on XRPL and Ethereum, aimed at cross-border settlement. * **EURC**: euro-referenced, relevant for EU products and MiCAR-aligned operations. * **DAI**: decentralized, crypto-collateralized USD stablecoin. * **MNEE**: USD stablecoin supported on Ethereum and on BSV as an ordinal. ### Crypto assets Crypto assets are native or ecosystem tokens that are primarily used for network fees, liquidity, collateral, treasury exposure, or crypto-native market access. Live examples include BSV, ETH, the native tokens of live EVM rails, TRX, and ADA. ### Utility tokens Fungible or ordinal-backed tokens you issue for your own product: loyalty units, in-app balances, access tokens, receipts, passes, and app-specific value. **Utility-token issuance is live on supported EVM rails, TRC-20 issuance is live on Tron, and BSV supports STAS tokens and ordinals for utility-token workflows.** ### Security tokens (Neucron Asset21) Regulated instruments issued and managed under transfer restrictions: equity, debt, fund units. Neucron's security-token stack is **Asset21**, built on permissioned token standards such as ERC-3643, ERC-1400/1594, and CMTAT. Security-token issuance is on the roadmap; the live matrix covers utility-token issuance only. ### RWA tokens Tokens backed by real-world assets. Live and prioritized examples include **PAXG** (gold-backed), **ONDO** (tokenized treasuries), and related RWA assets. RWA support depends on the specific asset, rail, jurisdiction, and compliance posture. ### NFTs, ordinals, and digital deeds Non-fungible, ordinal-backed, or semi-fungible assets used as receipts, utility passes, collectibles, real estate deeds, and luxury collectibles. Neucron supports **BSV ordinals** for utility-token workflows. ERC-721 and ERC-1155 digital deed support is on the roadmap. ## Protocols and when to use them | Protocol | Rail(s) | Asset type | When to use it | Status | | --------------------- | -------------- | --------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- | -------- | | Native coin | Live rails | Crypto / gas asset | Holding, transfer, fees, settlement, and treasury operations for each live rail's native token | **Live** | | ERC-20 | Live EVM rails | Fungible tokens: stablecoins, utility tokens, RWAs | Default standard for fungible assets on Ethereum and EVM-compatible rails | **Live** | | TRC-20 | Tron | Fungible tokens | Low-cost fungible issuance and transfer on Tron | **Live** | | STAS | BSV | Fungible utility tokens | Utility tokens, loyalty units, receipts, and low-fee token workflows on BSV | **Live** | | BSV ordinals | BSV | Ordinal-backed assets, utility tokens, collectibles | Utility tokens, MNEE on BSV, receipts, collectibles, and ordinal-backed app assets | **Live** | | Cardano native assets | Cardano | Native assets | ADA and Cardano-native token workflows | **Live** | | ERC-3643 (T-REX) | EVM rails | Permissioned security tokens | Regulated offerings that need on-chain identity and restricted transfers; the standard for decentralized identity and restricted transfer | Roadmap | | ERC-1400 / ERC-1594 | EVM rails | Partially fungible securities | Securities with tranches or share classes, attached documents, and controller operations | Roadmap | | CMTAT | EVM rails | Swiss equity / debt | Tokenized equity and debt under Swiss law | Roadmap | | ERC-721 / ERC-1155 | EVM rails | NFTs, digital deeds | Real estate deeds and luxury collectibles; 1155 when you need semi-fungible batches | Roadmap | | SPL / SPL-2022 | Solana | Fungible and extended tokens | High-throughput retail assets; SPL-2022 adds extensions such as transfer hooks and confidential transfers | Roadmap | | Move objects | Aptos / Sui | Object-native assets | Assets modeled as objects on Move-based chains | Roadmap | | CIP-56 | Canton Network | Regulated tokenized assets | Canton token standard; covers assets such as USDCx and cBTC | Roadmap | How to read the table: * **Native rail asset:** use the native coin row. This covers BSV, ETH, POL, BNB, AVAX, TRX, ADA, and native gas tokens on live L2s. * **Plain fungible asset on EVM:** ERC-20. Use this for USDC, USDT, PYUSD, RLUSD, EURC, PAXG, DAI, ONDO, MNEE on Ethereum, and utility tokens on EVM rails. * **BSV utility or ordinal-backed asset:** use STAS for fungible token workflows and BSV ordinals for ordinal-backed utility tokens, collectibles, and MNEE on BSV. * **Anything regulated:** start with ERC-3643 when identity-bound, permissioned transfer is the core requirement; use ERC-1400/1594 when you additionally need tranching and document management; use CMTAT for Swiss-law equity and debt. * **Unique or deed-like assets:** use BSV ordinals where the asset is ordinal-backed on BSV; use ERC-721 or ERC-1155 for EVM digital deed and collectible workflows as they move from roadmap to live support. * **Non-EVM rails:** each rail brings its own native framework. Neucron exposes them through the same asset APIs, so the rail-specific standard stays an implementation detail for you. {% hint style="info" %} **Live vs roadmap:** native coins, ERC-20 assets on live EVM rails, TRC-20 assets on Tron, STAS tokens, BSV ordinals, and Cardano native assets are production capabilities. Security-token standards and additional NFT/digital deed protocols are planned or capability-specific. {% endhint %} ## Related pages * [Supported Networks](/neucron/networks-and-assets/supported-networks.md): live and roadmap rails * Assets: Live & Upcoming: which assets are live and prioritized