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bitcoin/doc/REST-interface.md

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Unauthenticated REST Interface

The REST API can be enabled with the -rest option.

Supported API

####Transactions GET /rest/tx/TX-HASH.{bin|hex|json}

Given a transaction hash, Returns a transaction, in binary, hex-encoded binary or JSON formats.

For full TX query capability, one must enable the transaction index via "txindex=1" command line / configuration option.

####Blocks GET /rest/block/BLOCK-HASH.{bin|hex|json} GET /rest/block/notxdetails/BLOCK-HASH.{bin|hex|json}

Given a block hash, Returns a block, in binary, hex-encoded binary or JSON formats.

The HTTP request and response are both handled entirely in-memory, thus making maximum memory usage at least 2.66MB (1 MB max block, plus hex encoding) per request.

With the /notxdetails/ option JSON response will only contain the transaction hash instead of the complete transaction details. The option only affects the JSON response.

####Blockheaders GET /rest/headers/<COUNT>/<BLOCK-HASH>.<bin|hex>

Given a block hash, Returns amount of blockheaders in upward direction.

JSON is not supported.

####Chaininfos GET /rest/chaininfo.json

Returns various state info regarding block chain processing. Only supports JSON as output format.

  • chain : (string) current network name as defined in BIP70 (main, test, regtest)
  • blocks : (numeric) the current number of blocks processed in the server
  • headers : (numeric) the current number of headers we have validated
  • bestblockhash : (string) the hash of the currently best block
  • difficulty : (numeric) the current difficulty
  • verificationprogress : (numeric) estimate of verification progress [0..1]
  • chainwork : (string) total amount of work in active chain, in hexadecimal

GET /rest/getutxos

The getutxo command allows querying of the UTXO set given a set of of outpoints. See BIP64 for input and output serialisation: https://github.com/bitcoin/bips/blob/master/bip-0064.mediawiki

Risks

Running a webbrowser on the same node with a REST enabled bitcoind can be a risk. Accessing prepared XSS websites could read out tx/block data of your node by placing links like <script src="http://127.0.0.1:8332/rest/tx/1234567890.json"> which might break the nodes privacy.