feat(rwa-yield-accuracy): Sprint 2 — 4 remaining probes (BUIDL, USTB, BENJI, OUSG) - #1325
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… NAV probes
Ships the 4 remaining probes needed for the full V1 cohort:
Dividend model (share price fixed at 1 USD, monthly USDC dividends):
- buidl.go BlackRock BUIDL
- ustb.go Superstate USTB
- dividend.go Shared eth_getLogs helper for USDC Transfer events
from a specified treasury wallet across a windowed
block range, chunked in 10k-block slices.
NAV appreciation model (share price grows daily, no dividend transfers):
- benji.go Franklin BENJI
- ousg.go Ondo OUSG
- nav.go Shared JSON HTTP helper + in-memory NAV ring so the
probe can compute windowed yield without waiting for
issuers to expose historical NAV via API.
Also promotes all 5 probes into main.go's cohort so the harness
starts producing full deviation gauges on next run.
Known gaps closed in Sprint 3:
- Treasury wallet addresses for BUIDL/USTB are placeholders. Sprint 3
verifies against Securitize/Superstate docs on Etherscan.
- BENJI/OUSG NAV endpoint URLs are best-guess; Sprint 3 verifies the
actual public JSON endpoints and the field path within the response.
- Lifetime yield (since inception) is a placeholder zero across all
probes. Sprint 3 wires the contract deployment block for each.
- BENJI Ethereum wrapper address is TBD; primary chain is Stellar.
V1 measures via NAV endpoint only; wrapper supply is 'when known'.
Test plan:
- Build + vet clean (no output).
- Local RPC smoke run + cross-check against issuer dashboards deferred
to Sprint 3 (deploy + verification pass).
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Sprint 2 of the rwa-yield-accuracy bench. Ships the 4 remaining probes needed for the full V1 cohort.
Dividend-model probes (BUIDL, USTB)
Share price fixed at 1 USD by design; yield materializes as monthly USDC dividends distributed from a specific issuer treasury wallet to token holders. The probes:
Transferevents withfrom = treasury_walletacross the window (dividend.goshared helper, chunked in 10k-block slices to stay within eth_getLogs limits)NAV-appreciation probes (BENJI, OUSG)
Share price grows daily; no on-chain dividend transfers. The probes:
nav.goshared HTTP helper)navRing, 72 slots) so windowed yield becomes computable after the ring is warmprobe_oklabel distinguishes this from a real zeroKnown Sprint 3 verification items
The addresses and endpoint URLs are best-known-values in V1. Each is flagged as
TODO(Sprint 3)in the code:The harness will run and emit metrics with the placeholders; sprint 3 verifies against each issuer's dashboard and adjusts.
Test plan
go buildcleango vetclean