verifychain

verifychain ( checklevel nblocks )

Verifies blockchain database.

Argument #1 - checklevel

Type: numeric, optional, default=3, range=0-4

How thorough the block verification is:

• level 0 reads the blocks from disk

• level 1 verifies block validity

• level 2 verifies undo data

• level 3 checks disconnection of tip blocks

• level 4 tries to reconnect the blocks

• each level includes the checks of the previous levels

Argument #2 - nblocks

Type: numeric, optional, default=6, 0=all

The number of blocks to check.

Result

Name	Type	Description
true|false	boolean	Verified or not

Examples

bitcoin-cli verifychain

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