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121 lines
4.7 KiB
121 lines
4.7 KiB
3 years ago
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Unauthenticated REST Interface
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==============================
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The REST API can be enabled with the `-rest` option.
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The interface runs on the same port as the JSON-RPC interface, by default port 8332 for mainnet, port 18332 for testnet,
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port 38332 for signet, and port 18443 for regtest.
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REST Interface consistency guarantees
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-------------------------------------
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The [same guarantees as for the RPC Interface](/doc/JSON-RPC-interface.md#rpc-consistency-guarantees)
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apply.
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Limitations
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-----------
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There is a known issue in the REST interface that can cause a node to crash if
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too many http connections are being opened at the same time because the system runs
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out of available file descriptors. To prevent this from happening you might
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want to increase the number of maximum allowed file descriptors in your system
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and try to prevent opening too many connections to your rest interface at the
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same time if this is under your control. It is hard to give general advice
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since this depends on your system but if you make several hundred requests at
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once you are definitely at risk of encountering this issue.
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Supported API
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-------------
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#### Transactions
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`GET /rest/tx/<TX-HASH>.<bin|hex|json>`
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Given a transaction hash: returns a transaction in binary, hex-encoded binary, or JSON formats.
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By default, this endpoint will only search the mempool.
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To query for a confirmed transaction, enable the transaction index via "txindex=1" command line / configuration option.
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#### Blocks
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`GET /rest/block/<BLOCK-HASH>.<bin|hex|json>`
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`GET /rest/block/notxdetails/<BLOCK-HASH>.<bin|hex|json>`
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Given a block hash: returns a block, in binary, hex-encoded binary or JSON formats.
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Responds with 404 if the block doesn't exist.
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The HTTP request and response are both handled entirely in-memory.
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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.
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#### Blockheaders
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`GET /rest/headers/<COUNT>/<BLOCK-HASH>.<bin|hex|json>`
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Given a block hash: returns <COUNT> amount of blockheaders in upward direction.
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Returns empty if the block doesn't exist or it isn't in the active chain.
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#### Blockhash by height
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`GET /rest/blockhashbyheight/<HEIGHT>.<bin|hex|json>`
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Given a height: returns hash of block in best-block-chain at height provided.
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#### Chaininfos
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`GET /rest/chaininfo.json`
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Returns various state info regarding block chain processing.
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Only supports JSON as output format.
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* chain : (string) current network name (main, test, signet, regtest)
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* blocks : (numeric) the current number of blocks processed in the server
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* headers : (numeric) the current number of headers we have validated
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* bestblockhash : (string) the hash of the currently best block
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* difficulty : (numeric) the current difficulty
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* mediantime : (numeric) the median time of the 11 blocks before the most recent block on the blockchain
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* verificationprogress : (numeric) estimate of verification progress [0..1]
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* chainwork : (string) total amount of work in active chain, in hexadecimal
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* pruned : (boolean) if the blocks are subject to pruning
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* pruneheight : (numeric) highest block available
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* softforks : (array) status of softforks in progress
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#### Query UTXO set
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`GET /rest/getutxos/<checkmempool>/<txid>-<n>/<txid>-<n>/.../<txid>-<n>.<bin|hex|json>`
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The getutxo command allows querying of the UTXO set given a set of outpoints.
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See BIP64 for input and output serialisation:
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https://github.com/bitcoin/bips/blob/master/bip-0064.mediawiki
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Example:
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```
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$ curl localhost:18332/rest/getutxos/checkmempool/b2cdfd7b89def827ff8af7cd9bff7627ff72e5e8b0f71210f92ea7a4000c5d75-0.json 2>/dev/null | json_pp
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{
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"chainHeight" : 325347,
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"chaintipHash" : "00000000fb01a7f3745a717f8caebee056c484e6e0bfe4a9591c235bb70506fb",
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"bitmap": "1",
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"utxos" : [
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{
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"height" : 2147483647,
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"value" : 8.8687,
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"scriptPubKey" : {
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"asm" : "OP_DUP OP_HASH160 1c7cebb529b86a04c683dfa87be49de35bcf589e OP_EQUALVERIFY OP_CHECKSIG",
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"hex" : "76a9141c7cebb529b86a04c683dfa87be49de35bcf589e88ac",
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"type" : "pubkeyhash",
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"address" : "mi7as51dvLJsizWnTMurtRmrP8hG2m1XvD"
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}
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}
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]
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}
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```
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#### Memory pool
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`GET /rest/mempool/info.json`
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Returns various information about the TX mempool.
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Only supports JSON as output format.
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Refer to the `getmempoolinfo` RPC for documentation of the fields.
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`GET /rest/mempool/contents.json`
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Returns transactions in the TX mempool.
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Only supports JSON as output format.
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Risks
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-------------
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Running a web browser 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.
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