2015-11-29 12:22:35 +01:00
|
|
|
//! Generete trie root
|
|
|
|
|
|
2015-11-29 18:44:29 +01:00
|
|
|
//use std::collections::BTreeMap;
|
|
|
|
|
//use std::cmp;
|
|
|
|
|
//use hash::*;
|
|
|
|
|
//use sha3::*;
|
|
|
|
|
//use rlp;
|
|
|
|
|
//use rlp::RlpStream;
|
|
|
|
|
//use vector::SharedPrefix;
|
|
|
|
|
|
|
|
|
|
///// Hex-prefix Notation. First nibble has flags: oddness = 2^0 & termination = 2^1.
|
|
|
|
|
/////
|
|
|
|
|
///// The "termination marker" and "leaf-node" specifier are completely equivalent.
|
|
|
|
|
/////
|
|
|
|
|
///// Input values are in range `[0, 0xf]`.
|
|
|
|
|
/////
|
|
|
|
|
///// ```markdown
|
|
|
|
|
///// [0,0,1,2,3,4,5] 0x10012345 // 7 > 4
|
|
|
|
|
///// [0,1,2,3,4,5] 0x00012345 // 6 > 4
|
|
|
|
|
///// [1,2,3,4,5] 0x112345 // 5 > 3
|
|
|
|
|
///// [0,0,1,2,3,4] 0x00001234 // 6 > 3
|
|
|
|
|
///// [0,1,2,3,4] 0x101234 // 5 > 3
|
|
|
|
|
///// [1,2,3,4] 0x001234 // 4 > 3
|
|
|
|
|
///// [0,0,1,2,3,4,5,T] 0x30012345 // 7 > 4
|
|
|
|
|
///// [0,0,1,2,3,4,T] 0x20001234 // 6 > 4
|
|
|
|
|
///// [0,1,2,3,4,5,T] 0x20012345 // 6 > 4
|
|
|
|
|
///// [1,2,3,4,5,T] 0x312345 // 5 > 3
|
|
|
|
|
///// [1,2,3,4,T] 0x201234 // 4 > 3
|
|
|
|
|
///// ```
|
|
|
|
|
/////
|
|
|
|
|
///// ```rust
|
|
|
|
|
///// extern crate ethcore_util as util;
|
|
|
|
|
///// use util::triehash::*;
|
|
|
|
|
/////
|
|
|
|
|
///// fn main() {
|
|
|
|
|
///// let v = vec![0, 0, 1, 2, 3, 4, 5];
|
|
|
|
|
///// let e = vec![0x10, 0x01, 0x23, 0x45];
|
|
|
|
|
///// let h = hex_prefix_encode(&v, false);
|
|
|
|
|
///// assert_eq!(h, e);
|
|
|
|
|
/////
|
|
|
|
|
///// let v = vec![0, 1, 2, 3, 4, 5];
|
|
|
|
|
///// let e = vec![0x00, 0x01, 0x23, 0x45];
|
|
|
|
|
///// let h = hex_prefix_encode(&v, false);
|
|
|
|
|
///// assert_eq!(h, e);
|
|
|
|
|
/////
|
|
|
|
|
///// let v = vec![0, 1, 2, 3, 4, 5];
|
|
|
|
|
///// let e = vec![0x20, 0x01, 0x23, 0x45];
|
|
|
|
|
///// let h = hex_prefix_encode(&v, true);
|
|
|
|
|
///// assert_eq!(h, e);
|
|
|
|
|
/////
|
|
|
|
|
///// let v = vec![1, 2, 3, 4, 5];
|
|
|
|
|
///// let e = vec![0x31, 0x23, 0x45];
|
|
|
|
|
///// let h = hex_prefix_encode(&v, true);
|
|
|
|
|
///// assert_eq!(h, e);
|
|
|
|
|
/////
|
|
|
|
|
///// let v = vec![1, 2, 3, 4];
|
|
|
|
|
///// let e = vec![0x00, 0x12, 0x34];
|
|
|
|
|
///// let h = hex_prefix_encode(&v, false);
|
|
|
|
|
///// assert_eq!(h, e);
|
|
|
|
|
/////
|
|
|
|
|
///// let v = vec![4, 1];
|
|
|
|
|
///// let e = vec![0x20, 0x41];
|
|
|
|
|
///// let h = hex_prefix_encode(&v, true);
|
|
|
|
|
///// assert_eq!(h, e);
|
|
|
|
|
///// }
|
|
|
|
|
///// ```
|
|
|
|
|
/////
|
|
|
|
|
//pub fn hex_prefix_encode(nibbles: &[u8], leaf: bool) -> Vec<u8> {
|
|
|
|
|
//let inlen = nibbles.len();
|
|
|
|
|
//let oddness_factor = inlen % 2;
|
|
|
|
|
//// next even number divided by two
|
|
|
|
|
//let reslen = (inlen + 2) >> 1;
|
|
|
|
|
//let mut res = vec![];
|
|
|
|
|
//res.reserve(reslen);
|
|
|
|
|
|
|
|
|
|
//let first_byte = {
|
|
|
|
|
//let mut bits = ((inlen as u8 & 1) + (2 * leaf as u8)) << 4;
|
|
|
|
|
//if oddness_factor == 1 {
|
|
|
|
|
//bits += nibbles[0];
|
|
|
|
|
//}
|
|
|
|
|
//bits
|
|
|
|
|
//};
|
|
|
|
|
|
|
|
|
|
//res.push(first_byte);
|
|
|
|
|
|
|
|
|
|
//let mut offset = oddness_factor;
|
|
|
|
|
//while offset < inlen {
|
|
|
|
|
//let byte = (nibbles[offset] << 4) + nibbles[offset + 1];
|
|
|
|
|
//res.push(byte);
|
|
|
|
|
//offset += 2;
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//res
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
///// Converts slice of bytes to nibbles.
|
|
|
|
|
/////
|
|
|
|
|
///// ```rust
|
|
|
|
|
///// extern crate ethcore_util as util;
|
|
|
|
|
///// use util::triehash::*;
|
|
|
|
|
/////
|
|
|
|
|
///// fn main () {
|
|
|
|
|
///// let v = vec![0x31, 0x23, 0x45];
|
|
|
|
|
///// let e = vec![3, 1, 2, 3, 4, 5];
|
|
|
|
|
///// assert_eq!(as_nibbles(&v), e);
|
|
|
|
|
/////
|
|
|
|
|
///// // A => 65 => 0x41 => [4, 1]
|
|
|
|
|
///// let v: Vec<u8> = From::from("A");
|
|
|
|
|
///// let e = vec![4, 1];
|
|
|
|
|
///// assert_eq!(as_nibbles(&v), e);
|
|
|
|
|
///// }
|
|
|
|
|
///// ```
|
|
|
|
|
//pub fn as_nibbles(bytes: &[u8]) -> Vec<u8> {
|
|
|
|
|
//let mut res = vec![];
|
|
|
|
|
//res.reserve(bytes.len() * 2);
|
|
|
|
|
//for i in 0..bytes.len() {
|
|
|
|
|
//res.push(bytes[i] >> 4);
|
|
|
|
|
//res.push((bytes[i] << 4) >> 4);
|
|
|
|
|
//}
|
|
|
|
|
//res
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//#[derive(Debug)]
|
|
|
|
|
//pub struct NibblePair {
|
|
|
|
|
//nibble: Vec<u8>,
|
|
|
|
|
//data: Vec<u8>
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//impl NibblePair {
|
|
|
|
|
//pub fn new(nibble: Vec<u8>, data: Vec<u8>) -> NibblePair {
|
|
|
|
|
//NibblePair {
|
|
|
|
|
//nibble: nibble,
|
|
|
|
|
//data: data
|
|
|
|
|
//}
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//pub fn new_raw(to_nibble: Vec<u8>, data: Vec<u8>) -> NibblePair {
|
|
|
|
|
//NibblePair::new(as_nibbles(&to_nibble), data)
|
|
|
|
|
//}
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//pub fn ordered_trie_root(data: Vec<Vec<u8>>) -> H256 {
|
|
|
|
|
//let vec: Vec<NibblePair> = data
|
|
|
|
|
//// first put elements into btree to sort them by nibbles
|
|
|
|
|
//// optimize it later
|
|
|
|
|
//.into_iter()
|
|
|
|
|
//.fold(BTreeMap::new(), | mut acc, vec | {
|
|
|
|
|
//let len = acc.len();
|
|
|
|
|
//acc.insert(as_nibbles(&rlp::encode(&len)), vec);
|
|
|
|
|
//acc
|
|
|
|
|
//})
|
|
|
|
|
//// then move them to a vector
|
|
|
|
|
//.into_iter()
|
|
|
|
|
//.map(|(k, v)| NibblePair::new(k, v) )
|
|
|
|
|
//.collect();
|
|
|
|
|
|
|
|
|
|
//hash256(&vec)
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//pub fn hash256(vec: &[NibblePair]) -> H256 {
|
|
|
|
|
//let out = match vec.len() {
|
|
|
|
|
//0 => rlp::encode(&""),
|
|
|
|
|
//_ => {
|
|
|
|
|
//let mut stream = RlpStream::new();
|
|
|
|
|
//hash256rlp(&vec, 0, &mut stream);
|
|
|
|
|
//stream.out().unwrap()
|
|
|
|
|
//}
|
|
|
|
|
//};
|
2015-11-29 15:41:29 +01:00
|
|
|
|
2015-11-29 18:44:29 +01:00
|
|
|
//println!("out: {:?}", out);
|
|
|
|
|
//out.sha3()
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//fn hash256rlp(vec: &[NibblePair], pre_len: usize, stream: &mut RlpStream) {
|
|
|
|
|
//match vec.len() {
|
|
|
|
|
//0 => {
|
|
|
|
|
//stream.append(&"");
|
|
|
|
|
//},
|
|
|
|
|
//1 => {
|
|
|
|
|
//stream.append_list(2);
|
|
|
|
|
//stream.append(&hex_prefix_encode(&vec[0].nibble[pre_len..], true));
|
|
|
|
|
//stream.append(&vec[0].data);
|
|
|
|
|
//},
|
|
|
|
|
//_ => {
|
|
|
|
|
//let shared_prefix = vec.iter()
|
|
|
|
|
//// skip first element
|
|
|
|
|
//.skip(1)
|
|
|
|
|
//// get minimum number of shared nibbles between first and each successive
|
|
|
|
|
//.fold(usize::max_value(), | acc, pair | {
|
|
|
|
|
//cmp::min(vec[0].nibble.shared_prefix_len(&pair.nibble), acc)
|
|
|
|
|
//});
|
|
|
|
|
|
2015-11-29 15:41:29 +01:00
|
|
|
//match shared_prefix > pre_len {
|
2015-11-29 18:44:29 +01:00
|
|
|
//true => {
|
|
|
|
|
//stream.append_list(2);
|
|
|
|
|
//stream.append(&hex_prefix_encode(&vec[0].nibble[pre_len..shared_prefix], false));
|
|
|
|
|
//hash256aux(vec, shared_prefix, stream);
|
|
|
|
|
//},
|
|
|
|
|
//false => {
|
|
|
|
|
//stream.append_list(17);
|
|
|
|
|
|
|
|
|
|
//// every nibble is longer then previous one
|
|
|
|
|
//let iter = vec.iter()
|
|
|
|
|
//// move to first element with len different then pre_len
|
|
|
|
|
//.take_while(| pair | { pair.nibble.len() == pre_len });
|
|
|
|
|
|
|
|
|
|
//let mut begin = iter.count();
|
|
|
|
|
|
|
|
|
|
//for i in 0..16 {
|
|
|
|
|
//// cout how many successive elements have same next nibble
|
|
|
|
|
//let len = vec[begin..].iter()
|
|
|
|
|
//.map(| pair | pair.nibble[pre_len] )
|
|
|
|
|
//.take_while(|&q| q == i).count();
|
|
|
|
|
|
|
|
|
|
//match len {
|
|
|
|
|
//0 => { stream.append(&""); },
|
|
|
|
|
//_ => hash256aux(&vec[begin..begin + len], pre_len + 1, stream)
|
|
|
|
|
//}
|
|
|
|
|
//begin += len;
|
|
|
|
|
//}
|
2015-11-29 15:41:29 +01:00
|
|
|
|
2015-11-29 18:44:29 +01:00
|
|
|
//match pre_len == vec[0].nibble.len() {
|
|
|
|
|
//true => stream.append(&vec[0].data),
|
|
|
|
|
//false => stream.append(&"")
|
|
|
|
|
//};
|
|
|
|
|
//}
|
2015-11-29 15:41:29 +01:00
|
|
|
//}
|
2015-11-29 18:44:29 +01:00
|
|
|
//}
|
|
|
|
|
//};
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//fn hash256aux(vec: &[NibblePair], pre_len: usize, stream: &mut RlpStream) {
|
|
|
|
|
//let mut s = RlpStream::new();
|
|
|
|
|
//hash256rlp(vec, pre_len, &mut s);
|
|
|
|
|
//let out = s.out().unwrap();
|
|
|
|
|
//match out.len() {
|
|
|
|
|
//0...31 => stream.append_raw(&out, 1),
|
|
|
|
|
//_ => stream.append(&out.sha3())
|
|
|
|
|
//};
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//#[cfg(test)]
|
|
|
|
|
//mod tests {
|
|
|
|
|
//use std::str::FromStr;
|
|
|
|
|
//use rustc_serialize::hex::FromHex;
|
|
|
|
|
//use hash::*;
|
|
|
|
|
//use triehash::*;
|
|
|
|
|
|
|
|
|
|
//#[test]
|
|
|
|
|
//fn empty_trie_root() {
|
|
|
|
|
//assert_eq!(hash256(&vec![]), H256::from_str("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421").unwrap());
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//#[test]
|
|
|
|
|
//fn single_trie_item() {
|
|
|
|
|
|
|
|
|
|
//let v = vec![
|
|
|
|
|
//NibblePair::new_raw(From::from("A"),
|
|
|
|
|
//From::from("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"))
|
|
|
|
|
//];
|
|
|
|
|
//println!("{:?}", v);
|
|
|
|
|
//assert_eq!(hash256(&v), H256::from_str("d23786fb4a010da3ce639d66d5e904a11dbc02746d1ce25029e53290cabf28ab").unwrap());
|
|
|
|
|
//}
|
|
|
|
|
|
|
|
|
|
//#[test]
|
|
|
|
|
//fn test_trie_root() {
|
|
|
|
|
//let v = vec![
|
|
|
|
|
//NibblePair::new_raw("0000000000000000000000000000000000000000000000000000000000000045".from_hex().unwrap(),
|
|
|
|
|
//"22b224a1420a802ab51d326e29fa98e34c4f24ea".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("0000000000000000000000000000000000000000000000000000000000000046".from_hex().unwrap(),
|
|
|
|
|
//"67706c2076330000000000000000000000000000000000000000000000000000".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("000000000000000000000000697c7b8c961b56f675d570498424ac8de1a918f6".from_hex().unwrap(),
|
|
|
|
|
//"6f6f6f6820736f2067726561742c207265616c6c6c793f000000000000000000".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("0000000000000000000000007ef9e639e2733cb34e4dfc576d4b23f72db776b2".from_hex().unwrap(),
|
|
|
|
|
//"4655474156000000000000000000000000000000000000000000000000000000".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("000000000000000000000000ec4f34c97e43fbb2816cfd95e388353c7181dab1".from_hex().unwrap(),
|
|
|
|
|
//"4e616d6552656700000000000000000000000000000000000000000000000000".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("4655474156000000000000000000000000000000000000000000000000000000".from_hex().unwrap(),
|
|
|
|
|
//"7ef9e639e2733cb34e4dfc576d4b23f72db776b2".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("4e616d6552656700000000000000000000000000000000000000000000000000".from_hex().unwrap(),
|
|
|
|
|
//"ec4f34c97e43fbb2816cfd95e388353c7181dab1".from_hex().unwrap()),
|
|
|
|
|
|
|
|
|
|
//NibblePair::new_raw("6f6f6f6820736f2067726561742c207265616c6c6c793f000000000000000000".from_hex().unwrap(),
|
|
|
|
|
//"697c7b8c961b56f675d570498424ac8de1a918f6".from_hex().unwrap())
|
|
|
|
|
//];
|
|
|
|
|
|
|
|
|
|
//let root = H256::from_str("9f6221ebb8efe7cff60a716ecb886e67dd042014be444669f0159d8e68b42100").unwrap();
|
|
|
|
|
|
|
|
|
|
//let res = hash256(&v);
|
|
|
|
|
|
|
|
|
|
//println!("{:?}", res);
|
|
|
|
|
////assert!(false);
|
|
|
|
|
//}
|
|
|
|
|
//}
|
