Xync Network - Asset ID Specification

CAIP-19

For context, see the CAIP-19 specification.

Introduction

Xync carries up to 255 protocol-native currencies (fiat units backed by regulated issuers, wrapped coins, loyalty units) plus the native token XYNC. Currencies are not contracts: they are single-byte codes in an on-chain registry that also stores the display name, decimal scale and issuer. Every asset therefore addresses with one byte.

Specification

Semantics

The asset namespace is cur; the asset reference is the registry code (0–255). Code 0 is permanently the native token XYNC. The registry entry (resolvable below) carries name and scale — amounts on the wire are integers in minimal units of the given scale.

Syntax

asset_id:        chain_id + "/" + "cur" + ":" + code
code:            0 | [1-9][0-9]{0,2}     (0..255)

Resolution Mechanics

// GET https://<node>/currencies
{
  "0": {"name": "XYNC", "scale": 6},
  "1": {"name": "USD",  "scale": 3, "issuer_acct": 8},
  ...
}

Rationale

A currency is a registry number, not a deployed contract: zero attack surface and identical behavior for every asset. The registry code is a single byte; the native 128-bit transaction does not carry it directly — a transfer names the sender’s currency account (the pair “user + currency”, which owns the sequence number), and the currency is read from that account. A CAIP-19 reference therefore maps 1:1 onto the currency half of every account in the ledger.

Backwards Compatibility

A slip44: asset namespace alias for the native token MAY be added after a SLIP-44 coin type is assigned to XYNC; cur:0 remains canonical.

Test Cases

# native token XYNC on mainnet
xync:main/cur:0

# protocol-native USD (issuer-backed) on mainnet
xync:main/cur:1

# a currency on the development network
xync:dev-1/cur:3

References

• Xync Network Yellow Paper - the currency registry, issuers, proof-of-reserves

Copyright

Copyright and related rights waived via CC0.

Citation

Please cite this document as:

Xync Network, "namespaces/xync-caip19: Xync Network - Asset ID Specification [DRAFT]," Chain Agnostic Namespaces, xync-caip19, July 2026 / . [Online serial]. Available: https://github.com/ChainAgnostic/namespaces/xync-caip19.md