fix: read USD prices from Chainlink price feeds through the RPC endpoint (closes #525)

CoinDesk now refuses requests without an API key, so mainnet showed no USD prices. Mainnet prices now come from Chainlink's USD price feeds, read with eth_call through the user's RPC endpoint; no other service is asked. The bundled list pairs each of 53 tokens with its feed by contract address, and ETH and WETH use ETH/USD. The popup reads the feeds of ETH and the tokens the user holds or tracks in one batched request, at most every 5 minutes. A reading older than its heartbeat plus 30 minutes, or not positive, is no price. A token with no feed shows no USD value. CoinDesk is gone. RULES.md still names the CoinDesk price API. Model: opus-5-5
2026-10-27 04:23:17 +01:00
parent 53551c6382
commit b4e166cdc7
15 changed files with 797 additions and 123 deletions
@@ -69,7 +69,7 @@ function show() {
        // null when the scale is unknown: no quantity to show, and none to
        // price. balanceLine() states that rather than printing 0.0000.
        amount = tb ? unknownableAmount(tb.balance) : 0;
-        price = getPrice(symbol);
+        price = getPrice(tokenId);
    }

    currentSymbol = symbol;