add(grpc): get_results

[oxarbitrage]

Motivation

We want a grpc method to get all results for a given set of keys.

Close #8163

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• Will the PR name make sense to users?
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Solution

Add get_results grpc method to return all results for given keys.

Testing

Manual testing. Output in PR comment.

Review

Anyone can review.

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• Does the PR scope match the ticket?
• Are there enough tests to make sure it works? Do the tests cover the PR motivation?
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And check the PR Author checklist is complete.

Follow Up Work

• Depending on the key, the amount of returned transactions can be huge. We need to query by height range and limit the number of returned results. Extend getresults grpc #8233
• Tests

[oxarbitrage]

I am calling get_results with the zecpages viewing key for testing. Before the key has transactions the results are null, then i called get_results when the scanner was at 1020000:

2024-02-09T13:19:40.797981Z  INFO {zebrad="2c0bc3a" net="Main"}: zebra_scan::service::scan_task::scan: Scanning the blockchain for key 0, started at block 1017001, now at block 1020000, current tip 2396031

Obtaining results:

$ grpcurl -plaintext -import-path ./proto -proto scanner.proto -d '{"keys": ["zxviews1q0duytgcqqqqpqre26wkl45gvwwwd706xw608hucmvfalr759ejwf7qshjf5r9aa7323zulvz6plhttp5mltqcgs9t039cx2d09mgq05ts63n8u35hyv6h9nc9ctqqtue2u7cer2mqegunuulq2luhq3ywjcz35yyljewa4mgkgjzyfwh6fr6jd0dzd44ghk0nxdv2hnv4j5nxfwv24rwdmgllhe0p8568sgqt9ckt02v2kxf5ahtql6s0ltjpkckw8gtymxtxuu9gcr0swvz"]}' '127.0.0.1:8231' scanner.Scanner/GetResults
{
  "results": {
    "zxviews1q0duytgcqqqqpqre26wkl45gvwwwd706xw608hucmvfalr759ejwf7qshjf5r9aa7323zulvz6plhttp5mltqcgs9t039cx2d09mgq05ts63n8u35hyv6h9nc9ctqqtue2u7cer2mqegunuulq2luhq3ywjcz35yyljewa4mgkgjzyfwh6fr6jd0dzd44ghk0nxdv2hnv4j5nxfwv24rwdmgllhe0p8568sgqt9ckt02v2kxf5ahtql6s0ltjpkckw8gtymxtxuu9gcr0swvz": {
      "transactions": {
        "780532": {
          "hash": [
            "1c519cb72bc20d024f9c0954178403d16fac7ce8db594ac60db76213e6c8826b"
          ]
        },
        "780616": {
          "hash": [
            "9ef232c16b791e5c13c067115776dcfa1544b1830401af1c282886ca6395679e"
          ]
        },
...
        "1019617": {
          "hash": [
            "7b9899f9a92cbeeb26d75434b756ba6b6e1164a1f0e2321e0438cebdc34fe8ea"
          ]
        },
        "1020152": {
          "hash": [
            "7df21d5d054b7c481fd7a4a9cd104c441dbc261b463c448458877b64352d1b89"
          ]
        },
        "1020614": {
          "hash": [
            "79a5f3dd7e2e2793a04691e4f4e52442efc269c03c8daf605b572145682140ff"
          ]
        }
      }
    }
  }
}

[arya2]

Looks good!