63 lines
1.5 KiB
Rust
63 lines
1.5 KiB
Rust
use util::*;
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use header::BlockNumber;
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/// Simple vector of hashes, should be at most 256 items large, can be smaller if being used
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/// for a block whose number is less than 257.
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pub type LastHashes = Vec<H256>;
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/// Information concerning the execution environment for a message-call/contract-creation.
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#[derive(Debug)]
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pub struct EnvInfo {
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/// The block number.
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pub number: BlockNumber,
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/// The block author.
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pub author: Address,
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/// The block timestamp.
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pub timestamp: u64,
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/// The block difficulty.
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pub difficulty: U256,
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/// The block gas limit.
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pub gas_limit: U256,
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/// The last 256 block hashes.
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pub last_hashes: LastHashes,
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/// The gas used.
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pub gas_used: U256,
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}
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impl EnvInfo {
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pub fn new() -> EnvInfo {
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EnvInfo {
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number: 0,
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author: Address::new(),
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timestamp: 0,
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difficulty: x!(0),
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gas_limit: x!(0),
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last_hashes: vec![],
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gas_used: x!(0),
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}
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}
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}
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impl FromJson for EnvInfo {
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fn from_json(json: &Json) -> EnvInfo {
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let current_number: u64 = xjson!(&json["currentNumber"]);
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EnvInfo {
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number: current_number,
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author: xjson!(&json["currentCoinbase"]),
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difficulty: xjson!(&json["currentDifficulty"]),
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gas_limit: xjson!(&json["currentGasLimit"]),
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timestamp: xjson!(&json["currentTimestamp"]),
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last_hashes: (1..cmp::min(current_number + 1, 257)).map(|i| format!("{}", current_number - i).as_bytes().sha3()).collect(),
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gas_used: x!(0),
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}
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}
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}
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/// TODO: it should be the other way around.
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/// `new` should call `default`.
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impl Default for EnvInfo {
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fn default() -> Self {
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EnvInfo::new()
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}
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}
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