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@ledgerhq/live-countervalues

v0.22.0

Published

11 hours ago

Ledger Live countervalues module

0High
0Medium
0Low

ledger-releaser

live-countervalues

@ledgerhq/live-countervalues manages fiat (and cross-crypto) exchange rate fetching, caching, and portfolio valuation for Ledger Live. It fetches rates from Ledger's countervalues API and exposes pure functions to convert crypto amounts to fiat at any point in time.

What it does

Fetches exchange rates for crypto/fiat pairs from Ledger's API (api/)
Caches rates with time-bucketing to avoid redundant requests
Computes portfolio valuations: per-account balance in fiat, total portfolio value
Provides mock data generators for tests
Exposes rate interpolation and rounding helpers

Key exports / concepts

CountervaluesAPI — the data-fetching layer (rate queries, batch requests)
logic — pure functions: calculateCounterValue, inferCounterValue
portfolio — functions to compute fiat valuation across a list of accounts
CountervaluesState — the shape of the cached rate store
CountervaluesPair — { from: Currency, to: Currency } rate pair type

Usage context

Used by both Desktop and Mobile. The state is managed in Redux (or equivalent) and seeded from portfolio.ts. live-countervalues-react wraps this for React component consumption.