read arweave link for proposal description (solana-labs#1797)

actions/dryRunInstruction.ts

@@ -15,7 +15,10 @@ export async function dryRunInstruction(
   prerequisiteInstructionsToRun?: TransactionInstruction[] | undefined,
   additionalInstructions?: InstructionData[]
 ) {
+  const recentBlockHash = await connection.getLatestBlockhash()
   const transaction = new Transaction({ feePayer: wallet.publicKey })
+  transaction.lastValidBlockHeight = recentBlockHash.lastValidBlockHeight
+  transaction.recentBlockhash = recentBlockHash.blockhash
 
   transaction.add(
     ComputeBudgetProgram.setComputeUnitLimit({ units: 1_000_000 })

components/explorer/tools.ts

@@ -45,11 +45,6 @@ export async function getExplorerInspectorUrl(
     base58.encode(s.signature ?? Buffer.alloc(SIGNATURE_LENGTH))
   )
   explorerUrl.searchParams.append('signatures', JSON.stringify(signatures))
-  const recentBlockHash = await connection.current.getLatestBlockhash()
-  if (transaction instanceof Transaction) {
-    transaction.lastValidBlockHeight = recentBlockHash.lastValidBlockHeight
-    transaction.recentBlockhash = recentBlockHash.blockhash
-  }
 
   const message =
     transaction instanceof Transaction

utils/arweave.ts

@@ -0,0 +1,44 @@
+import axios from 'axios'
+
+const urlRegex =
+  // eslint-disable-next-line
+  /(https:\/\/)(arweave\.net\/)([\w-]{43})/
+
+export const arweaveDescriptionApi = {
+  fetchArweaveFile: fetchArweaveFile,
+  cancel: function () {
+    if (this?.abortController) {
+      this.abortController.abort()
+      this.abortController = null
+    }
+  },
+  abortController: null,
+}
+async function fetchArweaveFile(url: string) {
+  const controller = new AbortController()
+  if (typeof this !== 'undefined') {
+    this.abortController = controller
+  }
+  const pieces = url.match(urlRegex)
+  console.log(pieces)
+  if (pieces) {
+    console.log(pieces)
+    const idPiece = pieces[3]
+    if (idPiece) {
+      const apiUrl = 'https://arweave.net/' + idPiece
+      const apiResponse = await axios.get(apiUrl, {
+        signal: controller.signal,
+      })
+      if (apiResponse.status === 200) {
+        return apiResponse.data.description
+      } else {
+        console.warn('could not arweave file', {
+          url,
+          apiResponse: apiResponse.data,
+        })
+      }
+    }
+  }
+
+  return undefined
+}

utils/helpers.ts

@@ -1,5 +1,6 @@
 import { AccountInfo, Connection, PublicKey } from '@solana/web3.js'
 import { gistApi } from './github'
+import { arweaveDescriptionApi } from './arweave'
 
 export function capitalize(str?: string) {
   return str ? str?.charAt(0).toUpperCase() + str?.slice(1) : str
@@ -24,10 +25,19 @@ export class SanitizedObject {
 export async function resolveProposalDescription(descriptionLink: string) {
   try {
     gistApi.cancel()
+    arweaveDescriptionApi.cancel()
+    let desc = ''
     const url = new URL(descriptionLink)
-    const desc =
-      (await gistApi.fetchGistFile(url.toString())) ?? descriptionLink
-    return desc
+
+    if (url.toString().includes('gist')) {
+      desc = await gistApi.fetchGistFile(url.toString())
+    }
+
+    if (url.toString().includes('arweave')) {
+      desc = await arweaveDescriptionApi.fetchArweaveFile(url.toString())
+    }
+
+    return desc ? desc : descriptionLink
   } catch {
     return descriptionLink
   }