Add BlindPay shadow quote for USDC↔BRLA rebalances#1258
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…ute comparison Adds an observational BlindPay payin FX quote (BRL -> USDT/USDB) alongside the existing SquidRouter/Avenia/Nabla route quotes in compareRoutesUpfront, to evaluate whether BlindPay is a cheaper source of stablecoin over time. - New apps/rebalancer/src/services/blindpay: FX-rate client + types - fetchBlindpayShadowQuoteUsdc returns a USDC-equivalent (6dp) quote, or null when unconfigured or below BlindPay's 5 BRL minimum - Shadow only: logged in the route comparison but never added to candidates, so it is never actually routed through - Optional BLINDPAY_* config; documented in .env.example
…otification Threads the observational BlindPay shadow quote from compareRoutesUpfront through the preflight quotes and rebalance state into the Base completion Slack message, rendered as a 'BlindPay shadow (not routed)' line with the delta vs the executed route. Absent when BlindPay is unconfigured.
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ebma
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Superseded by #1257, which already merged this feature (plus unit tests + a request timeout) into staging. Nothing left to merge here. |
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What
Adds an observational BlindPay price comparison to the `usdc-brla-usdc-base` rebalancing route, to evaluate whether BlindPay is a cheaper source of stablecoin (USDT to feed into Nabla) than the routes we already use.
On each route comparison, `compareRoutesUpfront` now fetches a BlindPay shadow quote (payin BRL → USDT/USDB) in parallel with the SquidRouter / Avenia / Nabla quotes. It's:
```
BlindPay shadow (not routed): 95.220000 USDC-eq | vs SquidRouter 95.400000: -0.180000
```
Not routed
The shadow quote is never added to `candidates`, so BlindPay is never actually selected/executed — this is a data-gathering feature only. It never throws, and skips cleanly when BlindPay is unconfigured or the amount is below BlindPay's 5 BRL minimum.
Implementation
Config
```
BLINDPAY_API_KEY=...
BLINDPAY_INSTANCE_ID=in_...
BLINDPAY_BASE_URL=https://api.blindpay.com/v1 # optional
BLINDPAY_TOKEN=USDT # sandbox/dev instances only support USDB
```
When `BLINDPAY_API_KEY`/`BLINDPAY_INSTANCE_ID` are unset, the shadow quote is skipped and the rebalancer behaves exactly as before.
Testing
Notes for reviewers / before prod
0.1%) + flat fee ($0.10 on the test instance). Re-confirm fees on the production instance.