2019-09-10 13:27:10 -07:00
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//! Definitions of block datastructures.
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2020-05-26 18:00:58 -07:00
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#![allow(clippy::unit_arg)]
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2019-09-10 13:27:10 -07:00
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2020-06-25 09:18:05 -07:00
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mod hash;
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mod header;
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mod serialize;
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2020-01-31 21:27:51 -08:00
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#[cfg(test)]
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mod tests;
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2020-01-31 18:02:02 -08:00
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2020-06-15 15:08:14 -07:00
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use serde::{Deserialize, Serialize};
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2020-06-25 09:18:05 -07:00
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use std::sync::Arc;
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2019-09-24 22:14:48 -07:00
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2020-01-31 18:09:46 -08:00
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#[cfg(test)]
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use proptest_derive::Arbitrary;
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2019-09-24 22:14:48 -07:00
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use crate::transaction::Transaction;
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2020-02-08 13:19:32 -08:00
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use crate::types::BlockHeight;
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2019-09-24 22:14:48 -07:00
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2020-06-25 09:18:05 -07:00
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pub use hash::BlockHeaderHash;
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pub use header::BlockHeader;
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2019-09-24 22:14:48 -07:00
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2020-06-15 15:08:14 -07:00
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/// A block in your blockchain.
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///
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/// A block is a data structure with two fields:
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///
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/// Block header: a data structure containing the block's metadata
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/// Transactions: an array (vector in Rust) of transactions
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#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
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2020-01-31 21:27:51 -08:00
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#[cfg_attr(test, derive(Arbitrary))]
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2019-09-24 11:16:41 -07:00
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pub struct Block {
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2020-02-07 13:05:04 -08:00
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/// The block header, containing block metadata.
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2019-09-24 11:16:41 -07:00
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pub header: BlockHeader,
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2019-09-25 16:33:12 -07:00
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/// The block transactions.
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2020-06-05 10:58:01 -07:00
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pub transactions: Vec<Arc<Transaction>>,
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2019-09-24 11:16:41 -07:00
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}
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2019-09-26 19:38:18 -07:00
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2020-06-15 04:14:09 -07:00
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/// The maximum size of a Zcash block, in bytes.
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///
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/// Post-Sapling, this is also the maximum size of a transaction
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/// in the Zcash specification. (But since blocks also contain a
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/// block header and transaction count, the maximum size of a
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/// transaction in the chain is approximately 1.5 kB smaller.)
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const MAX_BLOCK_BYTES: u64 = 2_000_000;
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2020-02-08 13:19:32 -08:00
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impl Block {
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/// Return the block height reported in the coinbase transaction, if any.
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pub fn coinbase_height(&self) -> Option<BlockHeight> {
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use crate::transaction::TransparentInput;
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self.transactions
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.get(0)
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.and_then(|tx| tx.inputs().next())
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.and_then(|input| match input {
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TransparentInput::Coinbase { ref height, .. } => Some(*height),
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_ => None,
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})
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}
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}
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2020-02-07 09:21:23 -08:00
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impl<'a> From<&'a Block> for BlockHeaderHash {
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fn from(block: &'a Block) -> BlockHeaderHash {
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(&block.header).into()
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}
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}
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