Merge pull request #245 from kleros/feat/fetch-data-from-dynamic-script

feat: fetch data from dynamic script

Author: kyrers

package.json

@@ -15,6 +15,7 @@
     "antd": "^4.16.13",
     "bootstrap": "^5.0.0",
     "ethers": "^6.14.1",
+    "iframe": "^1.0.0",
     "iframe-resizer-react": "^1.1.0",
     "is-image": "^3.0.0",
     "is-text-path": "^2.0.0",

src/app.js

@@ -15,6 +15,7 @@ import ipfsPublish from "./ipfs-publish";
 import Archon from "@kleros/archon";
 import UnsupportedNetwork from "./components/unsupportedNetwork";
 import { urlNormalize } from "./urlNormalizer";
+import { fetchDataFromScript } from "./utils";
 
 // Constants to avoid magic numbers
 const HEX_PADDING_WIDTH = 64;
@@ -1311,7 +1312,7 @@ class App extends React.Component {
         throw new Error(`HTTP error! status: ${response.status}`);
       }
 
-      const metaEvidenceJSON = await response.json();
+      let metaEvidenceJSON = await response.json();
       console.debug(`📋 [getMetaEvidence] MetaEvidence JSON content:`, metaEvidenceJSON);
 
       console.log({ dispute: { metaEvidenceID, blockNumber: disputeEvent.blockNumber } });
@@ -1333,13 +1334,55 @@ class App extends React.Component {
       //Do not assume cross-chain for POH_V2, otherwise the iframe won't work
       const isPOH_V2 = networkMap[this.state.network].POH_V2_CONTRACTS.includes(arbitrableAddress);
 
-      // For cross-chain disputes where arbitrable is on Gnosis, ensure correct chainID
+      //For cross-chain disputes where arbitrable is on Gnosis, ensure correct chainID
       if (!isPOH_V2 && !metaEvidenceJSON.arbitrableChainID && network === '1') {
         console.debug(`🔧 [getMetaEvidence] Adding arbitrableChainID for cross-chain dispute`);
         metaEvidenceJSON.arbitrableChainID = '100'; // Gnosis chain
         metaEvidenceJSON.arbitratorChainID = '1';   // Ethereum mainnet
       }
 
+      //Check for the dynamicScriptURI and fetch data if available
+      if (metaEvidenceJSON.dynamicScriptURI) {
+        const scriptURI = urlNormalize(metaEvidenceJSON.dynamicScriptURI);
+
+        console.debug(`🔧 [getMetaEvidence] Fetching dynamic script from URI: ${scriptURI}`);
+
+        const response = await fetch(scriptURI);
+        if (!response.ok) throw new Error(`Unable to fetch dynamic script file at ${scriptURI}.`);
+
+        const scriptData = await response.text();
+        const injectedParameters = {
+          arbitratorChainID: metaEvidenceJSON.arbitratorChainID || network,
+          arbitrableChainID: metaEvidenceJSON.arbitrableChainID || network,
+          disputeID: arbitratorDisputeID,
+        };
+
+        injectedParameters.arbitrableContractAddress = arbitrableAddress;
+        injectedParameters.arbitratorJsonRpcUrl = getReadOnlyRpcUrl({ chainId: injectedParameters.arbitratorChainID });
+        injectedParameters.arbitrableChainID = injectedParameters.arbitrableChainID || metaEvidenceJSON.arbitrableChainID;
+        injectedParameters.arbitrableJsonRpcUrl = getReadOnlyRpcUrl({ chainId: injectedParameters.arbitrableChainID });
+
+        if (
+          injectedParameters.arbitratorChainID !== undefined &&
+          injectedParameters.arbitratorJsonRpcUrl === undefined
+        ) {
+          console.debug(`🔧 [getMetaEvidence] Could not obtain a valid 'arbitratorJsonRpcUrl' for chain ID ${injectedParameters.arbitratorChainID} on the Arbitrator side.`);
+        }
+
+        if (
+          injectedParameters.arbitrableChainID !== undefined &&
+          injectedParameters.arbitrableJsonRpcUrl === undefined
+        ) {
+          console.debug(`🔧 [getMetaEvidence] Could not obtain a valid 'arbitrableJsonRpcUrl' for chain ID ${injectedParameters.arbitrableChainID} on the Arbitrable side.`);
+        }
+
+        const metaEvidenceEdits = await fetchDataFromScript(scriptData, injectedParameters);
+        metaEvidenceJSON = {
+          ...metaEvidenceJSON,
+          ...metaEvidenceEdits,
+        };
+      }
+
       // Note: Block range parameters removed - evidence display interfaces 
       // should handle their own RPC optimization internally (follows Kleros Court approach)
 

src/utils.js

@@ -0,0 +1,51 @@
+import arbitrableWhitelist from "ethereum/arbitrableWhitelist";
+
+export async function fetchDataFromScript(scriptString, scriptParameters) {
+    const { default: iframe } = await import("iframe");
+
+    let resolver;
+    const returnPromise = new Promise((resolve) => {
+        resolver = resolve;
+    });
+
+    window.onmessage = (message) => {
+        if (message.data.target === "script") {
+            resolver(message.data.result);
+        }
+    };
+
+    const frameBody = `<script type='text/javascript'>
+      const scriptParameters = ${JSON.stringify(scriptParameters)}
+      let resolveScript
+      let rejectScript
+      const returnPromise = new Promise((resolve, reject) => {
+        resolveScript = resolve
+        rejectScript = reject
+      })
+  
+      returnPromise.then(result => {window.parent.postMessage(
+        {
+          target: 'script',
+          result
+        },
+        '*'
+      )})
+  
+      ${scriptString}
+      getMetaEvidence()
+    </script>`;
+
+    const _ = iframe({
+        body: frameBody,
+        sandboxAttributes: [
+            "allow-scripts",
+            arbitrableWhitelist[scriptParameters.arbitrableChainID]?.includes(
+                scriptParameters.arbitrableContractAddress.toLowerCase()
+            )
+                ? "allow-same-origin"
+                : undefined,
+        ],
+    });
+    _.iframe.style.display = "none";
+    return returnPromise;
+};

yarn.lock

@@ -7579,6 +7579,7 @@ __metadata:
     antd: "npm:^4.16.13"
     bootstrap: "npm:^5.0.0"
     ethers: "npm:^6.14.1"
+    iframe: "npm:^1.0.0"
     iframe-resizer-react: "npm:^1.1.0"
     is-image: "npm:^3.0.0"
     is-text-path: "npm:^2.0.0"