message: indexer-agent:Submit default poi if graph-node returns null
diff: @@ -465,7 +465,10 @@ class Agent {
  (await this.indexer.proofOfIndexing(
  deployment,
  allocation.createdAtBlockHash,
  - )) || utils.hexlify(utils.randomBytes(32))
  + )) ||
  + utils.hexlify(
  + '0xC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEEEEE',
  + )
  await this.network.close(allocation, poi)
  },
  { concurrency: 1 },
  @@ -534,7 +537,10 @@ class Agent {
  (await this.indexer.proofOfIndexing(
  deployment,
  allocation.createdAtBlockHash,
  - )) || utils.hexlify(Array(32).fill(0))
  + )) ||
  + utils.hexlify(
  + '0xC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEEEEE',
  + )
  const closed = await this.network.close(allocation, poi)
  return !closed
  } else {
  @@ -596,7 +602,10 @@ class Agent {
  (await this.indexer.proofOfIndexing(
  deployment,
  allocation.createdAtBlockHash,
  - )) || utils.hexlify(Array(32).fill(0))
  + )) ||
  + utils.hexlify(
  + '0xC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEC0FFEEEEEE',
  + )
  const closed = await this.network.close(allocation, poi)
  return !closed
  } else {
  