diff --git a/apps/daimo-mobile/src/action/dispatch.ts b/apps/daimo-mobile/src/action/dispatch.ts
index 2b413f13c..f8a1274cc 100644
--- a/apps/daimo-mobile/src/action/dispatch.ts
+++ b/apps/daimo-mobile/src/action/dispatch.ts
@@ -1,4 +1,4 @@
-import { DaimoRequestV2Status, DollarStr, ProposedSwap } from "@daimo/common";
+import { BigIntStr, DaimoRequestV2Status, ProposedSwap } from "@daimo/common";
 import { ReactElement, createContext } from "react";
 import { Address } from "viem";
 
@@ -13,7 +13,7 @@ export type Action =
   | { name: "createBackup" }
   | { name: "hideBottomSheet" }
   | { name: "swap"; swap: ProposedSwap }
-  | { name: "bitrefill"; address: Address; amount: DollarStr };
+  | { name: "bitrefill"; address: Address; amount: BigIntStr };
 
 type ActionName = Action["name"];
 
diff --git a/apps/daimo-mobile/src/logic/paymentURI.ts b/apps/daimo-mobile/src/logic/paymentURI.ts
new file mode 100644
index 000000000..23ffafff5
--- /dev/null
+++ b/apps/daimo-mobile/src/logic/paymentURI.ts
@@ -0,0 +1,37 @@
+import { BigIntStr } from "@daimo/common";
+import { polygonUSDC } from "@daimo/contract";
+import { isAddress, getAddress } from "viem";
+
+export function parsePaymentUri(uri: string) {
+  const [protocol, rest] = uri.split(":");
+  if (protocol !== "ethereum") throw new Error("Invalid protocol");
+
+  const [tokenAddressAndChain, pathAndQuery] = rest.split("/");
+  const [tokenAddress, chainId] = tokenAddressAndChain.split("@");
+  if (
+    !isAddress(tokenAddress) ||
+    getAddress(tokenAddress) !== polygonUSDC.token
+  ) {
+    throw new Error("Invalid token address");
+  }
+  if (!chainId || chainId !== "137") {
+    throw new Error("Unsupported chain ID");
+  }
+
+  const [path, queryString] = pathAndQuery.split("?");
+  if (path !== "transfer") throw new Error("Invalid path");
+
+  const params = new URLSearchParams(queryString);
+  const recipientAddress = params.get("address");
+  const amount = params.get("uint256");
+
+  if (!recipientAddress || !isAddress(recipientAddress)) {
+    throw new Error("Invalid recipient address");
+  }
+  if (!amount) throw new Error("Missing amount");
+
+  return {
+    recipientAddress: getAddress(recipientAddress),
+    amount: BigInt(Number(amount)).toString() as BigIntStr,
+  };
+}
diff --git a/apps/daimo-mobile/src/view/screen/deposit/BitrefillWebview.tsx b/apps/daimo-mobile/src/view/screen/deposit/BitrefillWebview.tsx
index e6541ffe8..8a3af8d39 100644
--- a/apps/daimo-mobile/src/view/screen/deposit/BitrefillWebview.tsx
+++ b/apps/daimo-mobile/src/view/screen/deposit/BitrefillWebview.tsx
@@ -1,13 +1,12 @@
-import { assert, zDollarStr } from "@daimo/common";
 import { useContext } from "react";
 import { View } from "react-native";
 import { WebView } from "react-native-webview";
-import { getAddress, isAddress } from "viem";
-import { z } from "zod";
+import { getAddress } from "viem";
 
 import { DispatcherContext } from "../../../action/dispatch";
 import { useNav } from "../../../common/nav";
 import { i18NLocale } from "../../../i18n";
+import { parsePaymentUri } from "../../../logic/paymentURI";
 import { ScreenHeader } from "../../shared/ScreenHeader";
 import { useTheme } from "../../style/theme";
 
@@ -22,29 +21,12 @@ export function BitrefillWebView() {
       case "payment_intent": {
         console.log(`[BITREFILL] payment_intent ${paymentUri}`);
 
-        const PaymentUriSchema = z.object({
-          protocol: z.literal("ethereum"),
-          address: z.string().refine((addr) => isAddress(addr), {
-            message: "Invalid Ethereum address",
-          }),
-          amount: zDollarStr,
-        });
-
         try {
-          const [protocol, rest] = paymentUri.split(":");
-          assert(protocol === "ethereum");
-          const [address, queryString] = rest.split("?");
-          const params = new URLSearchParams(queryString);
-
-          const parsedUri = PaymentUriSchema.parse({
-            protocol,
-            address,
-            amount: params.get("amount") || "",
-          });
+          const parsedUri = parsePaymentUri(paymentUri);
 
           dispatcher.dispatch({
             name: "bitrefill",
-            address: getAddress(parsedUri.address),
+            address: getAddress(parsedUri.recipientAddress),
             amount: parsedUri.amount,
           });
         } catch (error) {
diff --git a/apps/daimo-mobile/src/view/sheet/BitrefillBottomSheet.tsx b/apps/daimo-mobile/src/view/sheet/BitrefillBottomSheet.tsx
index eafc59d19..ae0ce1c74 100644
--- a/apps/daimo-mobile/src/view/sheet/BitrefillBottomSheet.tsx
+++ b/apps/daimo-mobile/src/view/sheet/BitrefillBottomSheet.tsx
@@ -1,8 +1,8 @@
-import { DollarStr, usdEntry } from "@daimo/common";
+import { BigIntStr, usdEntry } from "@daimo/common";
 import { polygonUSDC } from "@daimo/contract";
 import { useState } from "react";
 import { View } from "react-native";
-import { Address } from "viem";
+import { Address, formatUnits } from "viem";
 
 import { i18n } from "../../i18n";
 import { EAccountContact } from "../../logic/daimoContacts";
@@ -21,7 +21,7 @@ export function BitrefillBottomSheet({
   amount,
 }: {
   address: Address;
-  amount: DollarStr;
+  amount: BigIntStr;
 }) {
   const Inner = useWithAccount(BitrefillBottomSheetInner);
   return <Inner address={address} amount={amount} />;
@@ -34,14 +34,19 @@ function BitrefillBottomSheetInner({
 }: {
   account: Account;
   address: Address;
-  amount: `${number}`;
+  amount: BigIntStr;
 }) {
   const { color } = useTheme();
   const recipient: EAccountContact = { type: "eAcc", addr: address };
   // Show "bitrefill" as the name, but only on the send screen
   const recipientWithName = { ...recipient, name: "Bitrefill" };
 
-  const money = usdEntry(amount);
+  const roundedUpDollars =
+    Math.ceil(
+      parseFloat(formatUnits(BigInt(amount), polygonUSDC.decimals)) * 100
+    ) / 100;
+
+  const money = usdEntry(roundedUpDollars);
   const toCoin = polygonUSDC;
 
   const [success, setSuccess] = useState(false);
diff --git a/apps/daimo-mobile/src/view/sheet/GlobalBottomSheet.tsx b/apps/daimo-mobile/src/view/sheet/GlobalBottomSheet.tsx
index f41c5c97f..6182352ec 100644
--- a/apps/daimo-mobile/src/view/sheet/GlobalBottomSheet.tsx
+++ b/apps/daimo-mobile/src/view/sheet/GlobalBottomSheet.tsx
@@ -1,4 +1,4 @@
-import { DaimoRequestV2Status, ProposedSwap } from "@daimo/common";
+import { BigIntStr, DaimoRequestV2Status, ProposedSwap } from "@daimo/common";
 import BottomSheet, {
   BottomSheetBackdrop,
   BottomSheetView,
@@ -89,7 +89,7 @@ type DisplayedSheet =
   | { action: "swap"; payload: { swap: ProposedSwap } }
   | {
       action: "bitrefill";
-      payload: { address: Address; amount: `${number}` };
+      payload: { address: Address; amount: BigIntStr };
     };
 
 // Shows the main, global bottom sheet. This ensures that only a single of
diff --git a/apps/daimo-mobile/test/paymentURI.test.ts b/apps/daimo-mobile/test/paymentURI.test.ts
new file mode 100644
index 000000000..3a662170b
--- /dev/null
+++ b/apps/daimo-mobile/test/paymentURI.test.ts
@@ -0,0 +1,15 @@
+import { parsePaymentUri } from "../src/logic/paymentURI";
+
+describe("Payment URI", () => {
+  // https://github.com/daimo-eth/daimo/issues/1356
+  it("Parses Bitrefill URI", () => {
+    const uri = parsePaymentUri(
+      `ethereum:0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359@137/transfer?address=0xaCB6230043d1Fc3dE02a43Aa748540bb9F260931&uint256=1e8`
+    );
+
+    expect(uri.recipientAddress).toEqual(
+      "0xaCB6230043d1Fc3dE02a43Aa748540bb9F260931"
+    );
+    expect(uri.amount).toEqual("100000000");
+  });
+});