How do I know if the Bitcoin Core software on my computer is running taproot, segwit or something else?

Question

I would like to check this.

I imagine there must be some command to verify the current version of node software Bitcoin I am running ('version' is probably not the correct name here. Maybe 'soft fork' is?), e.g. Segwit, Taproot, etc.

Answer 1

Until Bitcoin Core 23.0.0, the status of deployments of consensus changes can be listed with the getblockchaininfo command:

Returns an object containing various state info regarding blockchain processing.

Result

{                                         (json object)
  "chain" : "str",                        (string) current network name (main, test, regtest)
  "blocks" : n,                           (numeric) the height of the most-work fully-validated chain. The genesis block has height 0
  "headers" : n,                          (numeric) the current number of headers we have validated
  "bestblockhash" : "str",                (string) the hash of the currently best block
  "difficulty" : n,                       (numeric) the current difficulty
  "mediantime" : n,                       (numeric) median time for the current best block
  "verificationprogress" : n,             (numeric) estimate of verification progress [0..1]
  "initialblockdownload" : true|false,    (boolean) (debug information) estimate of whether this node is in Initial Block Download mode
  "chainwork" : "hex",                    (string) total amount of work in active chain, in hexadecimal
  "size_on_disk" : n,                     (numeric) the estimated size of the block and undo files on disk
  "pruned" : true|false,                  (boolean) if the blocks are subject to pruning
  "pruneheight" : n,                      (numeric) lowest-height complete block stored (only present if pruning is enabled)
  "automatic_pruning" : true|false,       (boolean) whether automatic pruning is enabled (only present if pruning is enabled)
  "prune_target_size" : n,                (numeric) the target size used by pruning (only present if automatic pruning is enabled)
  "softforks" : {                         (json object) status of softforks
    "xxxx" : {                            (json object) name of the softfork
      "type" : "str",                     (string) one of "buried", "bip9"
      "bip9" : {                          (json object) status of bip9 softforks (only for "bip9" type)
        "status" : "str",                 (string) one of "defined", "started", "locked_in", "active", "failed"
        "bit" : n,                        (numeric) the bit (0-28) in the block version field used to signal this softfork (only for "started" status)
        "start_time" : xxx,               (numeric) the minimum median time past of a block at which the bit gains its meaning
        "timeout" : xxx,                  (numeric) the median time past of a block at which the deployment is considered failed if not yet locked in
        "since" : n,                      (numeric) height of the first block to which the status applies
        "statistics" : {                  (json object) numeric statistics about BIP9 signalling for a softfork (only for "started" status)
          "period" : n,                   (numeric) the length in blocks of the BIP9 signalling period
          "threshold" : n,                (numeric) the number of blocks with the version bit set required to activate the feature
          "elapsed" : n,                  (numeric) the number of blocks elapsed since the beginning of the current period
          "count" : n,                    (numeric) the number of blocks with the version bit set in the current period
          "possible" : true|false         (boolean) returns false if there are not enough blocks left in this period to pass activation threshold
        }
      },
      "height" : n,                       (numeric) height of the first block which the rules are or will be enforced (only for "buried" type, or "bip9" type with "active" status)
      "active" : true|false               (boolean) true if the rules are enforced for the mempool and the next block
    },
    ...
  },
  "warnings" : "str"                      (string) any network and blockchain warnings
}

In Bitcoin Core 23.0.0 this was moved into the getdeploymentinfo command:

Returns an object containing various state info regarding deployments of consensus changes.

Result

{                                       (json object)
  "hash" : "str",                       (string) requested block hash (or tip)
  "height" : n,                         (numeric) requested block height (or tip)
  "deployments" : {                     (json object)
    "xxxx" : {                          (json object) name of the deployment
      "type" : "str",                   (string) one of "buried", "bip9"
      "height" : n,                     (numeric, optional) height of the first block which the rules are or will be enforced (only for "buried" type, or "bip9" type with "active" status)
      "active" : true|false,            (boolean) true if the rules are enforced for the mempool and the next block
      "bip9" : {                        (json object, optional) status of bip9 softforks (only for "bip9" type)
        "bit" : n,                      (numeric, optional) the bit (0-28) in the block version field used to signal this softfork (only for "started" and "locked_in" status)
        "start_time" : xxx,             (numeric) the minimum median time past of a block at which the bit gains its meaning
        "timeout" : xxx,                (numeric) the median time past of a block at which the deployment is considered failed if not yet locked in
        "min_activation_height" : n,    (numeric) minimum height of blocks for which the rules may be enforced
        "status" : "str",               (string) status of deployment at specified block (one of "defined", "started", "locked_in", "active", "failed")
        "since" : n,                    (numeric) height of the first block to which the status applies
        "status_next" : "str",          (string) status of deployment at the next block
        "statistics" : {                (json object, optional) numeric statistics about signalling for a softfork (only for "started" and "locked_in" status)
          "period" : n,                 (numeric) the length in blocks of the signalling period
          "threshold" : n,              (numeric, optional) the number of blocks with the version bit set required to activate the feature (only for "started" status)
          "elapsed" : n,                (numeric) the number of blocks elapsed since the beginning of the current period
          "count" : n,                  (numeric) the number of blocks with the version bit set in the current period
          "possible" : true|false       (boolean, optional) returns false if there are not enough blocks left in this period to pass activation threshold (only for "started" status)
        },
        "signalling" : "str"            (string) indicates blocks that signalled with a # and blocks that did not with a -
      }
    }
  }
}

Example output of getdeploymentinfo:

{
  "hash": "00000000000000000009bd5a8aa82361c8daca42d241d0b1606d357579af35c5",
  "height": 732670,
  "deployments": {
    "bip34": {
      "type": "buried",
      "active": true,
      "height": 227931
    },
    "bip66": {
      "type": "buried",
      "active": true,
      "height": 363725
    },
    "bip65": {
      "type": "buried",
      "active": true,
      "height": 388381
    },
    "csv": {
      "type": "buried",
      "active": true,
      "height": 419328
    },
    "segwit": {
      "type": "buried",
      "active": true,
      "height": 481824
    },
    "taproot": {
      "type": "bip9",
      "height": 709632,
      "active": true,
      "bip9": {
        "start_time": 1619222400,
        "timeout": 1628640000,
        "min_activation_height": 709632,
        "status": "active",
        "since": 709632,
        "status_next": "active"
      }
    }
  }
}