fix(vms): removed stdin/stdout redirection in VM command and added regex match for blake3 hash

Author: ctrlc03

packages/actions/src/helpers/vm.ts

@@ -99,7 +99,7 @@ export const vmContributionVerificationCommand = (
     lastZkeyStoragePath: string,
     verificationTranscriptStoragePathAndFilename: string
 ): Array<string> => [
-    `aws s3 cp s3://${bucketName}/${lastZkeyStoragePath} /var/tmp/lastZKey.zkey &>/dev/null`,
+    `aws s3 cp s3://${bucketName}/${lastZkeyStoragePath} /var/tmp/lastZKey.zkey`,
     `snarkjs zkvi /var/tmp/genesisZkey.zkey /var/tmp/pot.ptau /var/tmp/lastZKey.zkey > /var/tmp/verification_transcript.log`,
     `aws s3 cp /var/tmp/verification_transcript.log s3://${bucketName}/${verificationTranscriptStoragePathAndFilename} &>/dev/null`,
     `/var/tmp/blake3.bin /var/tmp/verification_transcript.log | awk '{print $1}'`,

packages/backend/src/functions/circuit.ts

@@ -613,13 +613,18 @@ export const verifycontribution = functionsV2.https.onCall(
                 } else {
                     // Retrieve the contribution hash from the command output.
                     lastZkeyBlake2bHash = await retrieveCommandOutput(await createSSMClient(), commandId, vmInstanceId)
+                    const hashRegex = /[a-fA-F0-9]{64}/;
+                    const match = lastZkeyBlake2bHash.match(hashRegex);
+                    lastZkeyBlake2bHash = match![0]
+
                     // re upload the formatted verification transcript                   
                     await uploadFileToBucket(
                         bucketName, 
                         verificationTranscriptStoragePathAndFilename, 
                         verificationTranscriptTemporaryLocalPath, 
                         true
                     )
+                    // remove the local file
                     fs.unlinkSync(verificationTranscriptTemporaryLocalPath)
                 }