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use std::convert::TryFrom;
use crate::error::{Error, Result};
macro_rules! build_codec_enum {
{$( #[$attr:meta] $code:expr => $codec:ident, )*} => {
/// List of types currently supported in the multicodec spec.
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Debug, Hash)]
pub enum Codec {
$( #[$attr] $codec, )*
}
impl TryFrom<u64> for Codec {
type Error = Error;
/// Convert a number to the matching codec, or `Error` if unknown codec is matching.
fn try_from(raw: u64) -> Result<Codec> {
match raw {
$( $code => Ok(Self::$codec), )*
_ => Err(Error::UnknownCodec),
}
}
}
impl From<Codec> for u64 {
/// Convert to the matching integer code
fn from(codec: Codec) -> u64 {
match codec {
$( Codec::$codec => $code, )*
}
}
}
}
}
build_codec_enum! {
/// Raw binary
0x55 => Raw,
/// MerkleDAG protobuf
0x70 => DagProtobuf,
/// MerkleDAG cbor
0x71 => DagCBOR,
/// Raw Git object
0x78 => GitRaw,
/// Ethereum Block (RLP)
0x90 => EthereumBlock,
/// Ethereum Block List (RLP)
0x91 => EthereumBlockList,
/// Ethereum Transaction Trie (Eth-Trie)
0x92 => EthereumTxTrie,
/// Ethereum Transaction (RLP)
0x93 => EthereumTx,
/// Ethereum Transaction Receipt Trie (Eth-Trie)
0x94 => EthereumTxReceiptTrie,
/// Ethereum Transaction Receipt (RLP)
0x95 => EthereumTxReceipt,
/// Ethereum State Trie (Eth-Secure-Trie)
0x96 => EthereumStateTrie,
/// Ethereum Account Snapshot (RLP)
0x97 => EthereumAccountSnapshot,
/// Ethereum Contract Storage Trie (Eth-Secure-Trie)
0x98 => EthereumStorageTrie,
/// Bitcoin Block
0xb0 => BitcoinBlock,
/// Bitcoin Transaction
0xb1 => BitcoinTx,
/// Zcash Block
0xc0 => ZcashBlock,
/// Zcash Transaction
0xc1 => ZcashTx,
/// MerkleDAG json
0x0129 => DagJSON,
}