chore: fetch abi

package.json

@@ -14,7 +14,7 @@
   },
   "types": "dist/index.d.ts",
   "scripts": {
-    "prebuild": "rm -rf dist && yarn run codegen",
+    "prebuild": "rm -rf dist && rm -rf abi && yarn ts-node prepublish.ts && yarn run codegen",
     "build": "microbundle -f modern,esm,cjs",
     "start": "microbundle -f modern,esm,cjs watch",
     "postbuild": "cp package.json dist && cp README.md dist",

prepublish.ts

@@ -0,0 +1,48 @@
+import * as fs from 'fs'
+import * as https from 'https'
+import * as path from 'path'
+
+const UPSTREAM_COMMIT_HASH = '8c762559c98b707801f52dd070dd39ab9478b876'
+const UPSTREAM_REPO = 'https://raw.githubusercontent.com/cowprotocol/composable-cow'
+const ABI_TO_FETCH = ['ComposableCoW', 'ExtensibleFallbackHandler', 'TWAP']
+
+const urlsToDownload = ABI_TO_FETCH.map((abi) => {
+  return `${UPSTREAM_REPO}/${UPSTREAM_COMMIT_HASH}/out/${abi}.sol/${abi}.json`
+})
+
+const abiDir = path.join(__dirname, 'abi')
+
+if (!fs.existsSync(abiDir)) {
+  fs.mkdirSync(abiDir)
+}
+
+function downloadFile(url: string, targetPath: string): Promise<void> {
+  return new Promise<void>((resolve, reject) => {
+    const fileStream = fs.createWriteStream(targetPath)
+    const request = https.get(url, (response) => {
+      response.pipe(fileStream)
+      fileStream.on('finish', () => {
+        fileStream.close(() => resolve())
+      })
+    })
+
+    request.on('error', (error) => {
+      reject(error)
+    })
+  })
+}
+
+async function downloadAndMoveFiles(urls: string[]): Promise<void> {
+  for (const url of urls) {
+    const filename = path.basename(url)
+    const targetPath = path.join(abiDir, filename)
+    await downloadFile(url, targetPath)
+    console.log(`File ${filename} downloaded and saved successfully.`)
+  }
+}
+
+async function main() {
+  await downloadAndMoveFiles(urlsToDownload)
+}
+
+main()