Show settings credits to two decimals

packages/agent-chat/src/creditDisplay.ts

@@ -28,6 +28,20 @@ export function formatWholeCredits(amount: number): string {
   return `${sign}${grouped(String(Math.abs(n)))}`;
 }
 
+/** Local currency per some quantity → credit text at 2 decimals.
+
+One credit is ``rate`` of that currency (0.01 in production: one fen or one cent).
+A short amount stays a fraction. It is not rounded up to 1 credit.
+*/
+export function formatCreditsFromLocal(localAmount: number, rate = 0.01): string {
+  if (!Number.isFinite(localAmount) || localAmount <= 0 || !(rate > 0)) {
+    return formatFromMicros(0);
+  }
+  const millionths = Math.round(localAmount * 1_000_000);
+  const microsPerMillionth = Math.round(MICROS_PER_CREDIT / (rate * 1_000_000));
+  return formatFromMicros(millionths * microsPerMillionth);
+}
+
 /** Chat hops are stored in micros. Top-ups and withdrawals stay whole credits. */
 export function formatLedgerAmount(amount: number, unit?: string | null): string {
   if (unit === "micros") return formatFromMicros(Math.trunc(amount));

packages/agent-chat/src/ranch-shell/AgentOwnerSettings.tsx

@@ -24,6 +24,7 @@ import { copyText } from "./connectPrompt";
 import type { RanchMessages } from "./i18n";
 import { officialShelfAllows } from "./officialV0";
 import { formatLocalPerMillion } from "../composerPrice";
+import { formatCreditsFromLocal } from "../creditDisplay";
 import { chatSettleQuote, DEFAULT_CHAT_FEE_RATE } from "./settleQuote";
 import { btnGhost, btnPrimary, colors, inputStyle } from "./styles";
 import { useModalA11y } from "./useModalA11y";
@@ -95,11 +96,6 @@ function skuFromRow(row: PieceSku): Omit<PieceSku, "agent_id"> {
 const FALLBACK_MODEL_ID = "openai/gpt-4o-mini";
 const DEFAULT_MARKUP_PERCENT = 50;
 
-function roundUsdPerMillion(n: number): number {
-  // Keep enough precision for cheap models without noisy floats.
-  return Math.round(n * 1e6) / 1e6;
-}
-
 function sameModelId(left: string, right: string): boolean {
   return left.trim().toLowerCase() === right.trim().toLowerCase();
 }
@@ -215,14 +211,6 @@ function resolvePricingModelId(
   return FALLBACK_MODEL_ID;
 }
 
-/** 1 Credit = $0.01 — $1 = 100 Credits, same as wallet recharge. */
-const CREDIT_TO_USD = 0.01;
-
-function usdToCredits(usd: number): number {
-  if (!Number.isFinite(usd) || usd <= 0) return 0;
-  return Math.max(0, Math.ceil(roundUsdPerMillion(usd) / CREDIT_TO_USD - 1e-12));
-}
-
 function uniqModelIds(...groups: Array<Array<string | null | undefined> | undefined>): string[] {
   const out: string[] = [];
   const seen = new Set<string>();
@@ -2622,10 +2610,15 @@ export function AgentOwnerSettings({
               }}
             >
               {fillTemplate(t.myAgentsPricingCreditsLine, {
-                in: String(usdToCredits(inputParsed)),
-                out: String(usdToCredits(outputParsed)),
+                in: formatCreditsFromLocal(inputParsed),
+                out: formatCreditsFromLocal(outputParsed),
               })}
-              <FieldHint label={t.fieldHintLabel} text={t.myAgentsPricingCreditsNote} />
+              <FieldHint
+                label={t.fieldHintLabel}
+                text={fillTemplate(t.myAgentsPricingCreditsNote, {
+                  price: (selectedCatalog?.currency || "").toUpperCase() === "CNY" ? "¥1" : "$1",
+                })}
+              />
             </div>
           </div>
         ) : null}

packages/agent-chat/src/ranch-shell/i18n.ts

@@ -1193,8 +1193,8 @@ const en: RanchMessages = {
   myAgentsPricingModelSearch: "Search",
   myAgentsPricingOfficialEmpty: "No matching OpenRouter models in Host Catalog.",
   myAgentsPricingOptionLine: "${name} · in ${in} · out ${out}",
-  myAgentsPricingCreditsLine: "in ${in} · out ${out} Credits / 1M",
-  myAgentsPricingCreditsNote: "100 Credits = $1, same as wallet recharge. Each hop settles in whole Credits.",
+  myAgentsPricingCreditsLine: "in ${in} · out ${out} credits / 1M",
+  myAgentsPricingCreditsNote: "100 credits = ${price}. Usage is shown to 2 decimals. Top-up stays a whole number.",
   myAgentsPricingRuntimeHint:
     "Runtime reported: ${model} (heartbeat model only — Host cannot verify the key).",
   myAgentsPricingSelfReportNote:
@@ -1952,8 +1952,8 @@ const zh: RanchMessages = {
   myAgentsPricingModelSearch: "搜索",
   myAgentsPricingOfficialEmpty: "Host Catalog 里没有匹配的 OpenRouter 模型。",
   myAgentsPricingOptionLine: "${name} · 入 ${in} · 出 ${out}",
-  myAgentsPricingCreditsLine: "入 ${in} · 出 ${out} Credits /百万",
-  myAgentsPricingCreditsNote: "与钱包充值相同：100 Credits = $1。每跳按整数 Credits 结算。",
+  myAgentsPricingCreditsLine: "入 ${in} · 出 ${out} 星币 /百万",
+  myAgentsPricingCreditsNote: "100 星币 = ${price}。用量显示两位小数。充值仍是整数星币。",
   myAgentsPricingRuntimeHint: "运行环境上报：${model}（只认心跳型号，Host 看不见钥匙）。",
   myAgentsPricingSelfReportNote:
     "Owner 只设默认模型 + 上浮；底价由 Host 维护，智能体不能改写全网结算价。",

tests/credit-display.test.cjs

@@ -13,7 +13,7 @@ const js = ts.transpileModule(source, {
 }).outputText;
 const moduleExports = {};
 new Function("exports", js)(moduleExports);
-const { formatCreditBalance, formatLedgerAmount, formatWholeCredits } = moduleExports;
+const { formatCreditBalance, formatCreditsFromLocal, formatLedgerAmount, formatWholeCredits } = moduleExports;
 
 test("a balance keeps the micro remainder to two decimals", () => {
   assert.equal(formatCreditBalance(10, 14000), "10.01");
@@ -30,6 +30,14 @@ test("a chat hop in micros is shown in credits", () => {
   assert.equal(formatCreditBalance(1, 4999), "1.00");
 });
 
+test("a local price becomes credits at two decimals", () => {
+  assert.equal(formatCreditsFromLocal(1.15), "115.00");
+  assert.equal(formatCreditsFromLocal(2.3), "230.00");
+  assert.equal(formatCreditsFromLocal(0.766667), "76.67");
+  assert.equal(formatCreditsFromLocal(0.004), "0.40");
+  assert.equal(formatCreditsFromLocal(0), "0.00");
+});
+
 test("a top-up stays a whole number", () => {
   assert.equal(formatLedgerAmount(100, "credits"), "100");
   assert.equal(formatLedgerAmount(100), "100");