Feat(web): use netlify function to upload to IPFS

.gitignore

@@ -200,3 +200,6 @@ tags
 # subgraph
 subgraph/generated/*
 subgraph/build/*
+
+# Local Netlify folder
+.netlify

web/netlify/functions/uploadToIPFS.ts

@@ -0,0 +1,31 @@
+import { Handler } from "@netlify/functions";
+import fetch from "node-fetch";
+
+const ESTUARI_API_KEY = process.env["ESTUARY_API_KEY"];
+const ESTUARI_URL = "https://api.estuary.tech/content/add";
+
+export const handler: Handler = async (event, context) => {
+  context.callbackWaitsForEmptyEventLoop = false;
+  if (event.body) {
+    const newHeaders = event.headers;
+    delete newHeaders.host;
+    const response = await fetch(ESTUARI_URL, {
+      method: "POST",
+      headers: {
+        Authorization: `Bearer ${ESTUARI_API_KEY}`,
+        ...newHeaders,
+      },
+      body: Buffer.from(event.body, "base64"),
+    });
+
+    const parsedResponse = await response.json();
+    return {
+      statusCode: response.status,
+      body: JSON.stringify(parsedResponse),
+    };
+  }
+  return {
+    statusCode: 500,
+    body: JSON.stringify({ message: "Invalid body format" }),
+  };
+};

web/package.json

@@ -32,6 +32,7 @@
     "generate": "graphql-codegen"
   },
   "devDependencies": {
+    "@netlify/functions": "^1.4.0",
     "@parcel/transformer-svg-react": "~2.7.0",
     "@parcel/watcher": "~2.0.0",
     "@types/react": "^18.0.25",
@@ -40,6 +41,7 @@
     "@typescript-eslint/eslint-plugin": "^5.43.0",
     "@typescript-eslint/parser": "^5.43.0",
     "@typescript-eslint/utils": "^5.43.0",
+    "dotenv": "^16.0.3",
     "eslint": "^8.27.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-import-resolver-parcel": "^1.10.6",

web/src/pages/Cases/CaseDetails/Evidence/SubmitEvidenceModal.tsx

@@ -5,6 +5,7 @@ import { Textarea, Button } from "@kleros/ui-components-library";
 import { DisputeKitClassic } from "@kleros/kleros-v2-contracts/typechain-types/src/arbitration/dispute-kits/DisputeKitClassic";
 import { wrapWithToast } from "utils/wrapWithToast";
 import { useConnectedContract } from "hooks/useConnectedContract";
+import { uploadFormDataToIPFS } from "utils/uploadFormDataToIPFS";
 
 const SubmitEvidenceModal: React.FC<{
   isOpen: boolean;
@@ -37,11 +38,21 @@ const SubmitEvidenceModal: React.FC<{
           disabled={isSending}
           onClick={() => {
             setIsSending(true);
-            wrapWithToast(disputeKit.submitEvidence(evidenceGroup, message))
-              .then(() => {
-                setMessage("");
-                close();
+            const formData = constructEvidence(message);
+            uploadFormDataToIPFS(formData)
+              .then(async (res) => {
+                const response = await res.json();
+                if (res.status === 200) {
+                  const cid = "/ipfs/" + response["cid"];
+                  await wrapWithToast(
+                    disputeKit.submitEvidence(evidenceGroup, cid)
+                  ).then(() => {
+                    setMessage("");
+                    close();
+                  });
+                }
               })
+              .catch()
               .finally(() => setIsSending(false));
           }}
         />
@@ -50,6 +61,17 @@ const SubmitEvidenceModal: React.FC<{
   );
 };
 
+const constructEvidence = (msg: string) => {
+  const formData = new FormData();
+  const file = new File(
+    [JSON.stringify({ name: "Evidence", description: msg })],
+    "evidence.json",
+    { type: "text/plain" }
+  );
+  formData.append("data", file, file.name);
+  return formData;
+};
+
 const StyledModal = styled(Modal)`
   position: absolute;
   top: 50%;

web/src/utils/uploadFormDataToIPFS.ts

@@ -0,0 +1,32 @@
+import { toast, ToastContentProps } from "react-toastify";
+import { OPTIONS } from "utils/wrapWithToast";
+import { FetchError } from "node-fetch";
+
+interface RenderError extends ToastContentProps {
+  data: FetchError;
+}
+
+export function uploadFormDataToIPFS(formData: FormData): Promise<Response> {
+  return toast.promise(
+    new Promise((resolve, reject) =>
+      fetch("/.netlify/functions/uploadToIPFS", {
+        method: "POST",
+        body: formData,
+      }).then(async (response) =>
+        response.status === 200
+          ? resolve(response)
+          : reject({ message: (await response.json()).error.reason })
+      )
+    ),
+    {
+      pending: "Uploading evidence to IPFS...",
+      success: "Uploaded successfully!",
+      error: {
+        render({ data }: RenderError) {
+          return `Upload failed: ${data.message}`;
+        },
+      },
+    },
+    OPTIONS
+  );
+}

web/src/utils/wrapWithToast.ts

@@ -1,7 +1,7 @@
 import { toast, ToastPosition, Theme } from "react-toastify";
 import { ContractTransaction } from "ethers";
 
-const OPTIONS = {
+export const OPTIONS = {
   position: "top-center" as ToastPosition,
   autoClose: 5000,
   hideProgressBar: false,

yarn.lock

@@ -2312,6 +2312,7 @@ __metadata:
     "@graphql-codegen/typescript-operations": ^2.5.6
     "@kleros/kleros-v2-contracts": "workspace:^"
     "@kleros/ui-components-library": ^1.9.0
+    "@netlify/functions": ^1.4.0
     "@parcel/transformer-svg-react": ~2.7.0
     "@parcel/watcher": ~2.0.0
     "@types/react": ^18.0.25
@@ -2327,6 +2328,7 @@ __metadata:
     chart.js: ^3.9.1
     chartjs-adapter-moment: ^1.0.0
     core-js: ^3.21.1
+    dotenv: ^16.0.3
     eslint: ^8.27.0
     eslint-config-prettier: ^8.3.0
     eslint-import-resolver-parcel: ^1.10.6
@@ -2516,6 +2518,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@netlify/functions@npm:^1.4.0":
+  version: 1.4.0
+  resolution: "@netlify/functions@npm:1.4.0"
+  dependencies:
+    is-promise: ^4.0.0
+  checksum: 0adcd967689d647bcc98f5b20eda858e765cdef7caf4c56e11845edad03e070640c372865a1b846f0d7de786a9a87784bab099972bee7157e7771ccf0df503fb
+  languageName: node
+  linkType: hard
+
 "@noble/hashes@npm:1.1.2":
   version: 1.1.2
   resolution: "@noble/hashes@npm:1.1.2"
@@ -14400,6 +14411,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"is-promise@npm:^4.0.0":
+  version: 4.0.0
+  resolution: "is-promise@npm:4.0.0"
+  checksum: 0b46517ad47b00b6358fd6553c83ec1f6ba9acd7ffb3d30a0bf519c5c69e7147c132430452351b8a9fc198f8dd6c4f76f8e6f5a7f100f8c77d57d9e0f4261a8a
+  languageName: node
+  linkType: hard
+
 "is-promise@npm:~1, is-promise@npm:~1.0.0":
   version: 1.0.1
   resolution: "is-promise@npm:1.0.1"