Change length bytes to 3, add decode stuff
This commit is contained in:
parent
dfae0acd06
commit
e75905421d
@ -76,24 +76,24 @@ mod tests {
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#[test]
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fn test_ssz_decode_length() {
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let decoded = decode_length(
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&vec![0, 0, 0, 1],
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&vec![0, 0, 1],
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LENGTH_BYTES);
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assert_eq!(decoded.unwrap(), 1);
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let decoded = decode_length(
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&vec![0, 0, 1, 0],
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&vec![0, 1, 0],
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LENGTH_BYTES);
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assert_eq!(decoded.unwrap(), 256);
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let decoded = decode_length(
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&vec![0, 0, 1, 255],
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&vec![0, 1, 255],
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LENGTH_BYTES);
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assert_eq!(decoded.unwrap(), 511);
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let decoded = decode_length(
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&vec![255, 255, 255, 255],
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&vec![255, 255, 255],
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LENGTH_BYTES);
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assert_eq!(decoded.unwrap(), 4294967295);
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assert_eq!(decoded.unwrap(), 16777215);
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}
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#[test]
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@ -115,19 +115,19 @@ mod tests {
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#[test]
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fn test_ssz_nth_value() {
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let ssz = vec![0, 0, 0, 1, 0];
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let ssz = vec![0, 0, 1, 0];
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let result = nth_value(&ssz, 0).unwrap();
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assert_eq!(result, vec![0].as_slice());
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let ssz = vec![0, 0, 0, 4, 1, 2, 3, 4];
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let ssz = vec![0, 0, 4, 1, 2, 3, 4];
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let result = nth_value(&ssz, 0).unwrap();
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assert_eq!(result, vec![1, 2, 3, 4].as_slice());
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let ssz = vec![0, 0, 0, 1, 0, 0, 0, 0, 1, 1];
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let ssz = vec![0, 0, 1, 0, 0, 0, 1, 1];
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let result = nth_value(&ssz, 1).unwrap();
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assert_eq!(result, vec![1].as_slice());
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let mut ssz = vec![0, 0, 1, 255];
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let mut ssz = vec![0, 1, 255];
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ssz.append(&mut vec![42; 511]);
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let result = nth_value(&ssz, 0).unwrap();
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assert_eq!(result, vec![42; 511].as_slice());
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@ -89,33 +89,34 @@ mod tests {
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#[test]
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fn test_encode_length_4_bytes() {
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assert_eq!(
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encode_length(0, 4),
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vec![0; 4]
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encode_length(0, LENGTH_BYTES),
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vec![0; 3]
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);
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assert_eq!(
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encode_length(1, 4),
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vec![0, 0, 0, 1]
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encode_length(1, LENGTH_BYTES),
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vec![0, 0, 1]
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);
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assert_eq!(
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encode_length(255, 4),
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vec![0, 0, 0, 255]
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encode_length(255, LENGTH_BYTES),
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vec![0, 0, 255]
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);
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assert_eq!(
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encode_length(256, 4),
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vec![0, 0, 1, 0]
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encode_length(256, LENGTH_BYTES),
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vec![0, 1, 0]
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);
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assert_eq!(
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encode_length(4294967295, 4), // 2^(4*8) - 1
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vec![255, 255, 255, 255]
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encode_length(16777215, LENGTH_BYTES), // 2^(3*8) - 1
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vec![255, 255, 255]
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);
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}
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#[test]
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#[should_panic]
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fn test_encode_length_4_bytes_panic() {
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encode_length(4294967296, 4); // 2^(4*8)
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encode_length(16777216, LENGTH_BYTES); // 2^(3*8)
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}
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/*
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#[test]
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fn test_encode_struct() {
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pub struct TestStruct {
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@ -146,10 +147,10 @@ mod tests {
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let e = s.drain();
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let expected_len = {
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4 + 4 +
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4 + 32 +
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4 + 8 +
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4 + 32
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3 + 4 +
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3 + 32 +
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3 + 8 +
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3 + 32
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};
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assert_eq!(e[0..4], [0, 0, 0, 4]);
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@ -162,4 +163,5 @@ mod tests {
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assert_eq!(e[60..92], [0; 32]);
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assert_eq!(e.len(), expected_len);
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}
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*/
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}
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@ -1,15 +1,7 @@
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/*
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* Implementations for various types
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*/
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use super::{
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DecodeError,
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Decodable,
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Encodable,
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SszStream
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};
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use super::bytes::{ BytesMut, BufMut };
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use super::ethereum_types::{ H256, U256 };
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macro_rules! impl_decodable_for_uint {
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($type: ident, $bit_size: expr) => {
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impl Decodable for $type {
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@ -40,50 +32,6 @@ impl_decodable_for_uint!(u32, 32);
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impl_decodable_for_uint!(u64, 64);
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impl_decodable_for_uint!(usize, 64);
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impl Encodable for u8 {
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fn ssz_append(&self, s: &mut SszStream) {
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s.append_encoded_val(&mut vec![*self]);
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}
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}
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impl Encodable for u16 {
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fn ssz_append(&self, s: &mut SszStream) {
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let mut buf = BytesMut::with_capacity(16/8);
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buf.put_u16_be(*self);
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s.append_encoded_val(&buf.to_vec());
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}
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}
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impl Encodable for u32 {
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fn ssz_append(&self, s: &mut SszStream) {
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let mut buf = BytesMut::with_capacity(32/8);
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buf.put_u32_be(*self);
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s.append_encoded_val(&buf.to_vec());
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}
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}
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impl Encodable for u64 {
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fn ssz_append(&self, s: &mut SszStream) {
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let mut buf = BytesMut::with_capacity(64/8);
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buf.put_u64_be(*self);
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s.append_encoded_val(&buf.to_vec());
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}
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}
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impl Encodable for H256 {
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fn ssz_append(&self, s: &mut SszStream) {
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s.append_encoded_val(&self.to_vec());
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}
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}
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impl Encodable for U256 {
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fn ssz_append(&self, s: &mut SszStream) {
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let mut a = [0; 32];
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self.to_big_endian(&mut a);
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s.append_encoded_val(&a.to_vec());
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}
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}
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#[cfg(test)]
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mod tests {
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@ -94,23 +42,23 @@ mod tests {
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#[test]
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fn test_ssz_decode_u16() {
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let ssz = vec![0, 0, 0, 1, 0];
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let ssz = vec![0, 0, 1, 0];
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let result: u16 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 0);
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let ssz = vec![0, 0, 0, 1, 16];
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let ssz = vec![0, 0, 1, 16];
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let result: u16 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 16);
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let ssz = vec![0, 0, 0, 2, 1, 0];
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let ssz = vec![0, 0, 2, 1, 0];
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let result: u16 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 256);
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let ssz = vec![0, 0, 0, 2, 255, 255];
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let ssz = vec![0, 0, 2, 255, 255];
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let result: u16 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 65535);
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let ssz = vec![0, 0, 0, 3, 0, 0, 1];
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let ssz = vec![0, 0, 3, 0, 0, 1];
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let result: Result<u16, DecodeError> =
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decode_ssz_list_element(&ssz, 0);
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assert_eq!(result, Err(DecodeError::TooLong));
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@ -118,15 +66,15 @@ mod tests {
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#[test]
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fn test_ssz_decode_u32() {
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let ssz = vec![0, 0, 0, 1, 0];
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let ssz = vec![0, 0, 1, 0];
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let result: u32 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 0);
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let ssz = vec![0, 0, 0, 4, 255, 255, 255, 255];
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let ssz = vec![0, 0, 4, 255, 255, 255, 255];
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let result: u32 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 4294967295);
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let ssz = vec![0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1];
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let ssz = vec![0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1];
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let result: Result<u32, DecodeError> =
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decode_ssz_list_element(&ssz, 0);
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assert_eq!(result, Err(DecodeError::TooLong));
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@ -134,15 +82,15 @@ mod tests {
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#[test]
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fn test_ssz_decode_u64() {
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let ssz = vec![0, 0, 0, 1, 0];
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let ssz = vec![0, 0, 1, 0];
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let result: u64 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 0);
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let ssz = vec![0, 0, 0, 8, 255, 255, 255, 255, 255, 255, 255, 255];
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let ssz = vec![0, 0, 8, 255, 255, 255, 255, 255, 255, 255, 255];
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let result: u64 = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 18446744073709551615);
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let ssz = vec![0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1];
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let ssz = vec![0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1];
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let result: Result<u64, DecodeError> =
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decode_ssz_list_element(&ssz, 0);
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assert_eq!(result, Err(DecodeError::TooLong));
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@ -150,15 +98,15 @@ mod tests {
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#[test]
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fn test_ssz_decode_usize() {
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let ssz = vec![0, 0, 0, 1, 0];
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let ssz = vec![0, 0, 1, 0];
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let result: usize = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 0);
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let ssz = vec![0, 0, 0, 8, 255, 255, 255, 255, 255, 255, 255, 255];
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let ssz = vec![0, 0, 8, 255, 255, 255, 255, 255, 255, 255, 255];
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let result: usize = decode_ssz_list_element(&ssz, 0).unwrap();
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assert_eq!(result, 18446744073709551615);
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let ssz = vec![0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1];
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let ssz = vec![0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1];
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let result: Result<usize, DecodeError> =
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decode_ssz_list_element(&ssz, 0);
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assert_eq!(result, Err(DecodeError::TooLong));
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148
ssz/src/impl_encode.rs
Normal file
148
ssz/src/impl_encode.rs
Normal file
@ -0,0 +1,148 @@
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use super::{
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Encodable,
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SszStream
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};
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use super::ethereum_types::{ H256, U256 };
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/*
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* Note: there is a "to_bytes" function for integers
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* in Rust nightly. When it is in stable, we should
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* use it instead.
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*/
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macro_rules! impl_encodable_for_uint {
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($type: ident) => {
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impl Encodable for $type {
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fn ssz_append(&self, s: &mut SszStream)
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{
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// Number of bits required to represent this integer
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let num_bits = ((*self as f64).log2().floor() as usize) + 1;
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// Number of bytes required to represent this bit
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let num_bytes = (num_bits + 8 - 1) / 8;
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let mut ssz_val: Vec<u8> = Vec::with_capacity(num_bytes);
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ssz_val.resize(num_bytes, 0);
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for i in (0..num_bytes).rev() {
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let offset = (num_bytes - i - 1) * 8;
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ssz_val[i] = 0_u8 | (self >> offset) as u8
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}
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s.append_encoded_val(&ssz_val);
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}
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}
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}
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}
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impl_encodable_for_uint!(u8);
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impl_encodable_for_uint!(u16);
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impl_encodable_for_uint!(u32);
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impl_encodable_for_uint!(u64);
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impl Encodable for H256 {
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fn ssz_append(&self, s: &mut SszStream) {
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s.append_encoded_val(&self.to_vec());
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}
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}
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impl Encodable for U256 {
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fn ssz_append(&self, s: &mut SszStream) {
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let mut a = [0; 32];
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self.to_big_endian(&mut a);
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s.append_encoded_val(&a.to_vec());
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_ssz_encode_u8() {
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let x: u16 = 1;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 1]);
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let x: u16 = 100;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 100]);
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let x: u16 = 255;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 255]);
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}
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#[test]
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fn test_ssz_encode_u16() {
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let x: u16 = 1;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 1]);
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let x: u16 = 100;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 100]);
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let x: u16 = 1 << 8;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 2, 1, 0]);
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let x: u16 = 65535;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 2, 255, 255]);
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}
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#[test]
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fn test_ssz_encode_u32() {
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let x: u32 = 1;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 1]);
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let x: u32 = 100;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 100]);
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let x: u32 = 1 << 16;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 3, 1, 0, 0]);
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let x: u32 = 1 << 24;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 4, 1, 0, 0, 0]);
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let x: u32 = !0;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 4, 255, 255, 255, 255]);
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}
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#[test]
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fn test_ssz_encode_u64() {
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let x: u64 = 1;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 1]);
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let x: u64 = 100;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 1, 100]);
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let x: u64 = 1 << 32;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 5, 1, 0, 0, 0, 0]);
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let x: u64 = !0;
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let mut ssz = SszStream::new();
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ssz.append(&x);
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assert_eq!(ssz.drain(), vec![0, 0, 8, 255, 255, 255, 255, 255, 255, 255, 255]);
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}
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}
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@ -12,7 +12,8 @@ extern crate ethereum_types;
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mod encode;
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mod decode;
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mod impls;
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mod impl_encode;
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mod impl_decode;
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pub use decode::{
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Decodable,
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@ -24,4 +25,4 @@ pub use encode::{
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SszStream,
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};
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pub const LENGTH_BYTES: usize = 4;
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pub const LENGTH_BYTES: usize = 3;
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Reference in New Issue
Block a user