Heleos Tokenized Deposit Denominations
Technical Documentation - Version 1.0 | Effective Date: April 3, 2026
This document describes the current-state technical architecture of the Heleos IO denomination system. Certain properties described herein (including consensus staking scope, transaction fee structure, and basket composition) are subject to change as the platform evolves. Updates will be reflected in subsequent versions of this documentation.
Overview
IO Denomination System
The Heleos blockchain supports a family of tokenized deposit denominations operating through the StableNow banking integration platform. Each denomination represents a bank-issued tokenized deposit in a specific sovereign currency, recorded on the Heleos distributed ledger rather than a traditional banking database.
Denominations are implemented as first-class assets in the Heleos x/stablecoin module. Each denomination is compiled into the chain binary, registered with the bank module, and fully operational for mint, burn, transfer, and query operations under authority-controlled issuance.
StableNow is a globally-uniform integration platform. A partner bank in any jurisdiction connects to the denomination corresponding to its local currency through the same technical integration process. Denomination availability at the infrastructure layer is independent of bank partnership status - the technology operates from genesis and accepts new bank integrations as partnerships are executed.
On-Chain
Supported Denominations
The following denominations are live on the Heleos blockchain - 1 native staking token and 9 stablecoin module denominations.
| Mark | On-Chain Denomination | Name | Module |
|---|---|---|---|
| OS | uos | Heleos (native) | staking |
| USDIO | uusdio | Heleos US Dollar | x/stablecoin |
| EURIO | ueurio | Heleos Euro | x/stablecoin |
| JPYIO | ujpyio | Heleos Japanese Yen | x/stablecoin |
| GBPIO | ugbpio | Heleos British Pound | x/stablecoin |
| AUSIO | uausio | Heleos Australian Dollar | x/stablecoin |
| CADIO | ucadio | Heleos Canadian Dollar | x/stablecoin |
| CHFIO | uchfio | Heleos Swiss Franc | x/stablecoin |
| SGDIO | usgdio | Heleos Singapore Dollar | x/stablecoin |
| IO | uio | Heleos Multi-Currency Basket | x/stablecoin |
Source: x/stablecoin/types/currencies.go
Native Token
Native Token
The OS token powers the Heleos blockchain - consensus, gas fees, and Stake for Access across all ecosystem platforms.
Denominations
Tokenized Deposit Currencies
Each denomination has dedicated technical documentation including specifications, supported operations, and query endpoints.
USDIO
Heleos US Dollar
uusdio
EURIO
Heleos Euro
ueurio
JPYIO
Heleos Japanese Yen
ujpyio
GBPIO
Heleos British Pound
ugbpio
AUSIO
Heleos Australian Dollar
uausio
CADIO
Heleos Canadian Dollar
ucadio
CHFIO
Heleos Swiss Franc
uchfio
SGDIO
Heleos Singapore Dollar
usgdio
IO
Heleos Basket Currency Denomination
uio
Architecture
Common Technical Architecture
All IO denominations share the following technical characteristics.
Decimal Precision
Each denomination uses 6 decimal places. The base unit is the micro-denomination. 1 USDIO = 1,000,000 uusdio. 1 EURIO = 1,000,000 ueurio. This pattern is uniform across all denominations.
Issuance Authority
Mint and burn operations are restricted to the stablecoin authority address defined in the x/stablecoin module. Unauthorized mint or burn transactions are rejected at the module layer before reaching consensus. This authority model is the foundation of the tokenized deposit architecture - only parties authorized by the module may expand or contract the denomination supply.
Transfer Model
Once minted and distributed to a bank's custody address, denominations are freely transferable between Heleos blockchain addresses subject to standard bank module rules.
Consensus Staking
The native OS token is the sole asset participating in consensus staking, maintaining a clear separation between the ecosystem's consensus token and the tokenized deposit denominations. The staking architecture is designed to support additional denomination-level staking mechanisms for non-consensus purposes (such as platform access tier participation) in future protocol versions.
Transaction Fees
IO denominations are currently exempt from the Heleos ecosystem transaction fee applied to non-stablecoin transfers. Transfers of any IO denomination do not incur the ecosystem fee under the present fee model, enabling efficient high-volume deposit operations during the initial integration phase of the StableNow platform. The fee model is subject to evolution as the network matures and as denomination-native gas accounting is introduced in future protocol versions.
Query Access
All denominations are queryable through gRPC, REST, and CLI endpoints via the standard bank query interface. Supply, balance, and denomination metadata are publicly readable.
Integration
Integration Path
Any banking institution worldwide can integrate with the IO denomination corresponding to its operating currency through the StableNow platform. The integration process is technically uniform across jurisdictions:
- Letter of Intent. The partner bank executes an LOI with Heleos, LLC specifying the target denomination and target integration timeline.
- Regulatory Alignment. The partner bank confirms its regulatory standing in its home jurisdiction for deposit tokenization, coordinating with its primary regulator as required by local law.
- StableNow Platform Configuration. Heleos configures the StableNow platform for the partner bank's deposit tokenization workflows, including custody address assignment, authority delegation model, and operational reporting.
- Technical Integration. The partner bank's systems integrate with StableNow through the documented API surface. Integration scope includes deposit tokenization triggers, redemption workflows, reconciliation feeds, and audit reporting.
- Operational Launch. The partner bank begins tokenizing customer deposits in its home currency, minted as the corresponding IO denomination under its operational control.
The technology infrastructure is identical across denominations. A Eurozone bank integrating EURIO executes the same technical integration process as a US bank integrating USDIO. The only jurisdictional differences occur at the regulatory alignment layer, which is the partner bank's responsibility within its operating jurisdiction.
Reference
Source Documentation
For developers and integration partners requiring source-level technical information:
- Module Source:
x/stablecoin/(types, keeper, module handlers) - Currency Registry:
x/stablecoin/types/currencies.go - Authority Configuration:
x/stablecoin/keeper/authority.go - Basket Composition Logic:
x/stablecoin/keeper/basket.go - Protobuf Definitions:
proto/heleos/stablecoin/v1/ - Integration SDK: Available to partner institutions under execution of platform license
The Heleos blockchain and StableNow platform are built with CometBFT consensus. Technical integration follows standard patterns for any institution familiar with the ecosystem.
Financial infrastructure for the real world.