A web based interface to the Bitcoin API JSON-RPC

Command: getblockchaininfo

The getblockchaininfo RPC provides information about the current state of the block chain.

Parameters: none
Result—A JSON object providing information about the block chain

{
	"result": {
		"chain": "main",
		"blocks": 545924,
		"headers": 545924,
		"bestblockhash": "000000000000000000018d2e0327dd5bce4a6c81a56edaee81c5b94c8f35528f",
		"difficulty": 7454968648263.241,
		"mediantime": 1539635955,
		"verificationprogress": 0.9999972617128281,
		"initialblockdownload": false,
		"chainwork": "0000000000000000000000000000000000000000039f96842009587229b0bea0",
		"size_on_disk": 212161633688,
		"pruned": false,
		"softforks": [
			{
				"id": "bip34",
				"version": 2,
				"reject": {
					"status": true
				}
			},
			{
				"id": "bip66",
				"version": 3,
				"reject": {
					"status": true
				}
			},
			{
				"id": "bip65",
				"version": 4,
				"reject": {
					"status": true
				}
			}
		],
		"bip9_softforks": {
			"csv": {
				"status": "active",
				"startTime": 1462060800,
				"timeout": 1493596800,
				"since": 419328
			},
			"segwit": {
				"status": "active",
				"startTime": 1479168000,
				"timeout": 1510704000,
				"since": 481824
			}
		},
		"warnings": ""
	},
	"error": null,
	"id": null
}
getblockchaininfo
Returns an object containing various state info regarding blockchain processing.

Result:
{
  "chain": "xxxx",              (string) current network name as defined in BIP70 (main, test, regtest)
  "blocks": xxxxxx,             (numeric) the current number of blocks processed in the server
  "headers": xxxxxx,            (numeric) the current number of headers we have validated
  "bestblockhash": "...",       (string) the hash of the currently best block
  "difficulty": xxxxxx,         (numeric) the current difficulty
  "mediantime": xxxxxx,         (numeric) median time for the current best block
  "verificationprogress": xxxx, (numeric) estimate of verification progress [0..1]
  "initialblockdownload": xxxx, (bool) (debug information) estimate of whether this node is in Initial Block Download mode.
  "chainwork": "xxxx"           (string) total amount of work in active chain, in hexadecimal
  "size_on_disk": xxxxxx,       (numeric) the estimated size of the block and undo files on disk
  "pruned": xx,                 (boolean) if the blocks are subject to pruning
  "pruneheight": xxxxxx,        (numeric) lowest-height complete block stored (only present if pruning is enabled)
  "automatic_pruning": xx,      (boolean) whether automatic pruning is enabled (only present if pruning is enabled)
  "prune_target_size": xxxxxx,  (numeric) the target size used by pruning (only present if automatic pruning is enabled)
  "softforks": [                (array) status of softforks in progress
     {
        "id": "xxxx",           (string) name of softfork
        "version": xx,          (numeric) block version
        "reject": {             (object) progress toward rejecting pre-softfork blocks
           "status": xx,        (boolean) true if threshold reached
        },
     }, ...
  ],
  "bip9_softforks": {           (object) status of BIP9 softforks in progress
     "xxxx" : {                 (string) name of the softfork
        "status": "xxxx",       (string) one of "defined", "started", "locked_in", "active", "failed"
        "bit": xx,              (numeric) the bit (0-28) in the block version field used to signal this softfork (only for "started" status)
        "startTime": xx,        (numeric) the minimum median time past of a block at which the bit gains its meaning
        "timeout": xx,          (numeric) the median time past of a block at which the deployment is considered failed if not yet locked in
        "since": xx,            (numeric) height of the first block to which the status applies
        "statistics": {         (object) numeric statistics about BIP9 signalling for a softfork (only for "started" status)
           "period": xx,        (numeric) the length in blocks of the BIP9 signalling period 
           "threshold": xx,     (numeric) the number of blocks with the version bit set required to activate the feature 
           "elapsed": xx,       (numeric) the number of blocks elapsed since the beginning of the current period 
           "count": xx,         (numeric) the number of blocks with the version bit set in the current period 
           "possible": xx       (boolean) returns false if there are not enough blocks left in this period to pass activation threshold 
        }
     }
  }
  "warnings" : "...",           (string) any network and blockchain warnings.
}

Examples:
> bitcoin-cli getblockchaininfo 
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getblockchaininfo", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/