Include exchange-rate cache in support log output

The info log payload sent to the logs server now carries a snapshot of
the in-memory exchange-rate cache, including the subscribed pair lists
and per-rate expirations, so support can distinguish pairs that were
never requested from pairs that failed to resolve.

Author: peachbits

src/actions/LogActions.tsx

@@ -32,6 +32,7 @@ import { getCurrencyCode } from '../util/CurrencyInfoHelpers'
 import { base58 } from '../util/encoding'
 import { clearLogs, logWithType, readLogs } from '../util/logger'
 import { getOsVersion } from '../util/utils'
+import { getExchangeRateCacheDump } from './ExchangeRateActions'
 
 const logsUri = 'https://logs1.edge.app/v1/log/'
 
@@ -242,6 +243,13 @@ os: ${Platform.OS} ${Platform.Version}
 device: ${getBrand()} ${getDeviceId()}
 `
 
+    // Include the current exchange-rate cache, so support can see which
+    // rate pairs the app is subscribed to and which rates it actually has:
+    const rateCache = getExchangeRateCacheDump()
+    logOutput.data += `***Exchange Rate Cache***\n${
+      rateCache == null ? 'not loaded' : JSON.stringify(rateCache)
+    }\n`
+
     // Get activity logs
     const activityLogs = await readLogs('activity')
     activityOutput.data += activityLogs ?? ''