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Support get_header API

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This commit is contained in:
Roman Zeyde 2018-05-02 15:59:39 +03:00
parent 12d16f0df5
commit 0b5a67b81f
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GPG Key ID: 87CAE5FA46917CBB
2 changed files with 32 additions and 14 deletions
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6
src/query.rs
View File

@ -1,7 +1,7 @@
use bincode;
use bitcoin::blockdata::block::BlockHeader;
use bitcoin::blockdata::transaction::Transaction;
use bitcoin::network::serialize::{deserialize, serialize};
use bitcoin::network::serialize::deserialize;
use bitcoin::util::hash::Sha256dHash;
use itertools::enumerate;
@ -150,13 +150,13 @@ impl<'a> Query<'a> {
.get(&format!("tx/{}.bin", tx_hash.be_hex_string()))
}
pub fn get_headers(&self, heights: &[usize]) -> Vec<Bytes> {
pub fn get_headers(&self, heights: &[usize]) -> Vec<BlockHeader> {
let headers_list = self.index.headers_list();
let headers = headers_list.headers();
let mut result = Vec::new();
for h in heights {
let header: &BlockHeader = headers[*h].header();
result.push(serialize(header).unwrap());
result.push(*header);
}
result
}

40
src/rpc.rs
View File

@ -1,3 +1,5 @@
use bitcoin::blockdata::block::BlockHeader;
use bitcoin::network::serialize::serialize;
use bitcoin::util::hash::Sha256dHash;
use itertools;
use serde_json::{from_str, Number, Value};
@ -55,21 +57,24 @@ fn hash_from_status(status: &Status) -> Option<FullHash> {
Some(hash)
}
fn format_header(header: &BlockHeader, height: usize) -> Value {
json!({
"block_height": height,
"version": header.version,
"prev_block_hash": header.prev_blockhash.be_hex_string(),
"merkle_root": header.merkle_root.be_hex_string(),
"timestamp": header.time,
"bits": header.bits,
"nonce": header.nonce
})
}
impl<'a> Handler<'a> {
fn blockchain_headers_subscribe(&self) -> Result<Value> {
let entry = self.query
.get_best_header()
.chain_err(|| "no headers found")?;
let header = entry.header();
Ok(json!({
"block_height": entry.height(),
"version": header.version,
"prev_block_hash": header.prev_blockhash.be_hex_string(),
"merkle_root": header.merkle_root.be_hex_string(),
"timestamp": header.time,
"bits": header.bits,
"nonce": header.nonce
}))
Ok(format_header(entry.header(), entry.height()))
}
fn server_version(&self) -> Result<Value> {
@ -98,10 +103,22 @@ impl<'a> Handler<'a> {
let index = index.as_u64().chain_err(|| "non-number index")? as usize;
let heights: Vec<usize> = (0..CHUNK_SIZE).map(|h| index * CHUNK_SIZE + h).collect();
let headers = self.query.get_headers(&heights);
let result = itertools::join(headers.into_iter().map(|x| util::hexlify(&x)), "");
let result = itertools::join(
headers
.into_iter()
.map(|x| util::hexlify(&serialize(&x).unwrap())),
"",
);
Ok(json!(result))
}
fn blockchain_block_get_header(&self, params: &[Value]) -> Result<Value> {
let height = params.get(0).chain_err(|| "missing height")?;
let height = height.as_u64().chain_err(|| "non-number height")? as usize;
let headers = self.query.get_headers(&vec![height]);
Ok(json!(format_header(&headers[0], height)))
}
fn blockchain_estimatefee(&self, _params: &[Value]) -> Result<Value> {
Ok(json!(1e-5)) // TODO: consult with actual mempool
}
@ -157,6 +174,7 @@ impl<'a> Handler<'a> {
"server.peers.subscribe" => self.server_peers_subscribe(),
"mempool.get_fee_histogram" => self.mempool_get_fee_histogram(),
"blockchain.block.get_chunk" => self.blockchain_block_get_chunk(&params),
"blockchain.block.get_header" => self.blockchain_block_get_header(&params),
"blockchain.estimatefee" => self.blockchain_estimatefee(&params),
"blockchain.relayfee" => self.blockchain_relayfee(),
"blockchain.scripthash.subscribe" => self.blockchain_scripthash_subscribe(&params),