# Block Explorer Features

Build block explorer interfaces showing block details, transaction counts, and multi-chain block data.

## HomeBlockListInit: Recent Blocks Across Chains

Display latest completed blocks across all chains with transaction counts for explorer homepages.


```graphql
query HomeBlockListInit($heightCount: Int, $completedHeights: Boolean, $first: Int) {
  completedBlockHeights(heightCount: $heightCount, completedHeights: $completedHeights, first: $first) {
    edges {
      node {
        chainId
        creationTime
        height
        transactions {
          totalCount
        }
        coinbase
      }
    }
  }
}
```

**Variables**


```json
{
  "heightCount": 3,
  "completedHeights": true,
  "first": 5
}
```

**Response**


```json
{
  "data": {
    "completedBlockHeights": {
      "edges": [
        {
          "node": {
            "chainId": 0,
            "creationTime": "2025-09-25T18:59:18.000Z",
            "height": 6211154,
            "transactions": {
              "totalCount": 45
            },
            "coinbase": "k:miner-account-key"
          }
        },
        {
          "node": {
            "chainId": 1,
            "creationTime": "2025-09-25T18:59:16.000Z",
            "height": 6211153,
            "transactions": {
              "totalCount": 23
            },
            "coinbase": "k:another-miner-key"
          }
        },
        {
          "node": {
            "chainId": 2,
            "creationTime": "2025-09-25T18:59:14.000Z",
            "height": 6211152,
            "transactions": {
              "totalCount": 67
            },
            "coinbase": "k:third-miner-key"
          }
        },
        {
          "node": {
            "chainId": 3,
            "creationTime": "2025-09-25T18:59:12.000Z",
            "height": 6211151,
            "transactions": {
              "totalCount": 12
            },
            "coinbase": "k:fourth-miner-key"
          }
        },
        {
          "node": {
            "chainId": 4,
            "creationTime": "2025-09-25T18:59:10.000Z",
            "height": 6211150,
            "transactions": {
              "totalCount": 89
            },
            "coinbase": "k:fifth-miner-key"
          }
        }
      ]
    }
  }
}
```

**Use Cases**

- Block explorer homepage feeds
- Chain-specific block browsers
- Mining statistics dashboards
- Network topology visualization


**Notes**
completedHeights: true ensures only fully validated blocks. Use heightCount to control how many recent heights to display across chains.

## Blocks: Advanced Block Filtering

Retrieve blocks with sophisticated filtering by depth, chains, and pagination for detailed block explorer interfaces.


```graphql
query Blocks(
  $minimumDepth: Int!,
  $first: Int,
  $last: Int,
  $after: String,
  $before: String,
  $chainIds: [String!]
) {
  blocksFromDepth(
    minimumDepth: $minimumDepth,
    first: $first,
    last: $last,
    after: $after,
    before: $before,
    chainIds: $chainIds
  ) {
    edges {
      node {
        chainId
        creationTime
        transactions {
          totalCount
          edges {
            node {
              cmd {
                meta {
                  gasPrice
                }
              }
            }
          }
        }
        height
        coinbase
        hash
        canonical
      }
      cursor
    }
    pageInfo {
      endCursor
      hasNextPage
      hasPreviousPage
      startCursor
    }
    totalCount
  }
}
```

**Variables**


```json
{
  "minimumDepth": 6,
  "first": 10,
  "chainIds": ["0", "1", "2"]
}
```

**Response**


```json
{
  "data": {
    "blocksFromDepth": {
      "edges": [
        {
          "node": {
            "chainId": 14,
            "creationTime": "2025-09-25T23:29:37.241Z",
            "transactions": {
              "totalCount": 0,
              "edges": []
            },
            "height": 6211678,
            "coinbase": "{\"gas\":0,\"logs\":\"...\",\"events\":[...]}",
            "hash": "2Y30bznAbJiPfcitK6WAiOe1O_CA7o_2W3_XTjGnAYg",
            "canonical": true
          },
          "cursor": "NjIxMTY3ODoxMTU3MzE0NzM="
        },
        {
          "node": {
            "chainId": 19,
            "creationTime": "2025-09-25T23:29:23.357Z",
            "transactions": {
              "totalCount": 8,
              "edges": [
                {
                  "node": {
                    "cmd": {
                      "meta": {
                        "gasPrice": "0.0000001"
                      }
                    }
                  }
                }
              ]
            },
            "height": 6211678,
            "coinbase": "{\"gas\":0,\"logs\":\"...\",\"events\":[...]}",
            "hash": "lwDPu0SM05ixwgMvqmMVekiiqzWqsEm-3pnA8MoQfHc",
            "canonical": true
          },
          "cursor": "NjIxMTY3ODoxMTU3MzE0Njk="
        },
        {
          "node": {
            "chainId": 0,
            "creationTime": "2025-09-25T23:29:23.647Z",
            "transactions": {
              "totalCount": 7,
              "edges": [
                {
                  "node": {
                    "cmd": {
                      "meta": {
                        "gasPrice": "0.0000001"
                      }
                    }
                  }
                },
                {
                  "node": {
                    "cmd": {
                      "meta": {
                        "gasPrice": "0.000001"
                      }
                    }
                  }
                }
              ]
            },
            "height": 6211678,
            "coinbase": "{\"gas\":0,\"logs\":\"...\",\"events\":[...]}",
            "hash": "8f0WRzLFV-4MYbEHstJP5_7zXpWDN8ZpS4pL2p8qaTs",
            "canonical": true
          },
          "cursor": "NjIxMTY3ODoxMTU3MzE0NjY="
        }
      ],
      "pageInfo": {
        "endCursor": "NjIxMTY3NzoxMTU3MzE0NDk=",
        "hasNextPage": true,
        "hasPreviousPage": false,
        "startCursor": "NjIxMTY3ODoxMTU3MzE0NzM="
      },
      "totalCount": 115713029
    }
  }
}
```

**Use Cases**

- Advanced block explorer interfaces
- Chain-specific block browsing
- Paginated block lists with depth filtering
- Block analysis with transaction preview


**Notes**
minimumDepth ensures block finality. Use chainIds to filter specific chains. Pagination via pageInfo cursors handles large result sets efficiently.


```

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