RWA·Ethereum · Base · Arbitrum · BNB Chain · Solana · XRPL
OpenEden
Tokenized short-duration US Treasury Bills (TBILL) and a permissioned-yield dollar (USDO). The TBILL Fund is a BVI-regulated professional fund custodied by BNY, rated AA+f/S1+ by S&P and A-bf by Moody's. ERC-4626 vault on Ethereum/Base/BNB/Arbitrum, plus an SPL deployment on Solana.
- 01tokenized T-bill exposure
- 02ERC-4626 treasury vault integration
- 03Solana RWA yield (TBILL SPL)
- 04BNY-custodied real-world cash
- 05non-US professional investor onchain treasuries
| Variable | Scope | Description |
|---|---|---|
| OPENEDEN_TBILL_VAULT_ADDRESS | Client | TBILL ERC-4626 vault on the target EVM chain (Ethereum: 0xeFFEF2C8225b1ef0CA8a1351A2F4cFb56f3A1644). |
| OPENEDEN_KYC_REGISTRY_ADDRESS | Client | OpenEden KYC registry contract used to gate transfers and subscriptions. |
Use OpenEden for tokenized US T-bill yield. TBILL is an ERC-4626 vault — call `deposit(usdcAmount, receiver)` to mint TBILL shares, `redeem(shares, receiver, owner)` to burn back to USDC; share price grows daily as the underlying portfolio accrues. The vault enforces a KYC registry: every depositor and transfer recipient must be flagged in the OpenEden KYC contract (Accredited Investor or Professional Investor) — calls revert otherwise. For Solana, use the TBILL SPL token program with an analogous allowlist enforced by a transfer-hook program. Subscriptions/redemptions settle T+0 during NY market hours and T+1 outside. Read NAV via `vault.totalAssets() / vault.totalSupply()` and the latest attestation hash from the operator. Always preflight `kycRegistry.isVerified(wallet)` and surface the OpenEden onboarding URL when false.
- ⚑TBILL is restricted to Accredited or Professional Investors (non-US under Reg S, US under Reg D) — wallets without KYC verification cannot mint or receive transfers.
- ⚑Subscriptions during US market closure (weekends/holidays) settle the next business day — UX must show pending state, not instant confirmation.
- ⚑Solana TBILL uses a transfer-hook (Token-2022) program; classic SPL wallets that don't support the hook will not be able to send/receive.
- ⚑NAV is published by the BVI-regulated fund administrator off-chain; share price updates lag market by ~1 epoch — never quote real-time T-bill yields as exact.
- ⚑Cross-chain (e.g. BNB → Ethereum) TBILL movement is via canonical bridge plus KYC re-check on the destination chain — allow minutes-to-hours.
- ⚑Custody depends on BNY — surface this dependency to users, plus the S&P/Moody's ratings for institutional reassurance.
- ⚑Minimum subscription is typically 100,000 USDC for direct primary issuance; secondary DEX liquidity exists but at varying spreads.