Add eth2_bytes crate
Is passing test vectors
This commit is contained in:
Paul Hauner
parent
8c54e55d99
commit
46673238b6
@ -7,6 +7,7 @@ members = [
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"eth2/types",
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"eth2/utils/bls",
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"eth2/utils/boolean-bitfield",
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"eth2/utils/eth2_bytes",
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"eth2/utils/hashing",
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"eth2/utils/honey-badger-split",
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"eth2/utils/slot_clock",
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12
eth2/utils/eth2_bytes/Cargo.toml
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12
eth2/utils/eth2_bytes/Cargo.toml
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@ -0,0 +1,12 @@
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[package]
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name = "eth2_bytes"
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version = "0.1.0"
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authors = ["Paul Hauner <paul@paulhauner.com>"]
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edition = "2018"
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[dependencies]
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bytes = "0.4"
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[dev-dependencies]
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yaml-rust = "0.4.2"
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hex = "0.3"
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125
eth2/utils/eth2_bytes/src/lib.rs
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125
eth2/utils/eth2_bytes/src/lib.rs
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@ -0,0 +1,125 @@
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use bytes::{BufMut, BytesMut};
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/// Returns `int` as little-endian bytes with a length of 1.
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pub fn int_to_bytes1(int: u8) -> Vec<u8> {
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vec![int]
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}
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/// Returns `int` as little-endian bytes with a length of 2.
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pub fn int_to_bytes2(int: u16) -> Vec<u8> {
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let mut bytes = BytesMut::with_capacity(2);
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bytes.put_u16_le(int);
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bytes.to_vec()
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}
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/// Returns `int` as little-endian bytes with a length of 3.
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///
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/// An `Option` is returned as Rust does not support a native
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/// `u24` type.
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///
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/// The Eth 2.0 specification uses `int.to_bytes(2, 'little')`, which throws an error if `int`
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/// doesn't fit within 3 bytes. The specification relies upon implicit asserts for some validity
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/// conditions, so we ensure the calling function is aware of the error condition as opposed to
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/// hiding it with a modulo.
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pub fn int_to_bytes3(int: u32) -> Option<Vec<u8>> {
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if int < 2_u32.pow(3 * 8) {
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let mut bytes = BytesMut::with_capacity(4);
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bytes.put_u32_le(int);
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Some(bytes[0..3].to_vec())
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} else {
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None
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}
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}
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/// Returns `int` as little-endian bytes with a length of 4.
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pub fn int_to_bytes4(int: u32) -> Vec<u8> {
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let mut bytes = BytesMut::with_capacity(4);
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bytes.put_u32_le(int);
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bytes.to_vec()
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}
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/// Returns `int` as little-endian bytes with a length of 8.
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pub fn int_to_bytes8(int: u64) -> Vec<u8> {
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let mut bytes = BytesMut::with_capacity(8);
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bytes.put_u64_le(int);
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bytes.to_vec()
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}
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/// Returns `int` as little-endian bytes with a length of 32.
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pub fn int_to_bytes32(int: u64) -> Vec<u8> {
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let mut bytes = BytesMut::with_capacity(32);
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bytes.put_u64_le(int);
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bytes.resize(32, 0);
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bytes.to_vec()
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}
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/// Returns `int` as little-endian bytes with a length of 48.
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pub fn int_to_bytes48(int: u64) -> Vec<u8> {
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let mut bytes = BytesMut::with_capacity(48);
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bytes.put_u64_le(int);
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bytes.resize(48, 0);
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bytes.to_vec()
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}
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/// Returns `int` as little-endian bytes with a length of 96.
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pub fn int_to_bytes96(int: u64) -> Vec<u8> {
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let mut bytes = BytesMut::with_capacity(96);
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bytes.put_u64_le(int);
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bytes.resize(96, 0);
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bytes.to_vec()
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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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use hex;
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use std::{fs::File, io::prelude::*, path::PathBuf};
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use yaml_rust::yaml;
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#[test]
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fn int_to_bytes3_returns_none() {
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assert_eq!(int_to_bytes3(2_u32.pow(24)), None);
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}
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#[test]
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fn test_vectors() {
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/*
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* Test vectors are generated here:
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*
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* https://github.com/ethereum/eth2.0-test-generators
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*/
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let mut file = {
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let mut file_path_buf = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
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file_path_buf.push("src/specs/test_vector_int_to_bytes.yml");
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File::open(file_path_buf).unwrap()
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};
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let mut yaml_str = String::new();
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file.read_to_string(&mut yaml_str).unwrap();
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let docs = yaml::YamlLoader::load_from_str(&yaml_str).unwrap();
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let doc = &docs[0];
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let test_cases = doc["test_cases"].as_vec().unwrap();
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for test_case in test_cases {
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let byte_length = test_case["byte_length"].as_i64().unwrap() as u64;
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let int = test_case["int"].as_i64().unwrap() as u64;
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let bytes_string = test_case["bytes"].clone().into_string().unwrap();
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let bytes = hex::decode(bytes_string.replace("0x", "")).unwrap();
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match byte_length {
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1 => assert_eq!(int_to_bytes1(int as u8), bytes),
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2 => assert_eq!(int_to_bytes2(int as u16), bytes),
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3 => assert_eq!(int_to_bytes3(int as u32), Some(bytes)),
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4 => assert_eq!(int_to_bytes4(int as u32), bytes),
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8 => assert_eq!(int_to_bytes8(int), bytes),
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32 => assert_eq!(int_to_bytes32(int), bytes),
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48 => assert_eq!(int_to_bytes48(int), bytes),
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96 => assert_eq!(int_to_bytes96(int), bytes),
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_ => panic!("Unknown byte length in test vector."),
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}
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}
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}
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}
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215
eth2/utils/eth2_bytes/src/specs/test_vector_int_to_bytes.yml
Normal file
215
eth2/utils/eth2_bytes/src/specs/test_vector_int_to_bytes.yml
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@ -0,0 +1,215 @@
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fork: tchaikovsky
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summary: Test vectors for the `int_to_bytes[n]` functions.`
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test_suite: int_to_bytes
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title: int_to_bytes Tests
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version: 1.0
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test_cases:
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- {byte_length: 1, bytes: '0x00', int: 0}
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- {byte_length: 1, bytes: '0x01', int: 1}
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- {byte_length: 1, bytes: '0xff', int: 255}
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- {byte_length: 1, bytes: '0xc0', int: 192}
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- {byte_length: 1, bytes: '0xc7', int: 199}
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- {byte_length: 1, bytes: '0xf2', int: 242}
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- {byte_length: 1, bytes: '0x26', int: 38}
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- {byte_length: 1, bytes: '0xfb', int: 251}
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- {byte_length: 1, bytes: '0xd5', int: 213}
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- {byte_length: 1, bytes: '0x74', int: 116}
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- {byte_length: 1, bytes: '0xa8', int: 168}
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- {byte_length: 1, bytes: '0xc6', int: 198}
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- {byte_length: 1, bytes: '0x3d', int: 61}
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- {byte_length: 1, bytes: '0xc2', int: 194}
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- {byte_length: 1, bytes: '0x68', int: 104}
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- {byte_length: 1, bytes: '0x64', int: 100}
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- {byte_length: 1, bytes: '0xc2', int: 194}
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- {byte_length: 1, bytes: '0x78', int: 120}
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- {byte_length: 1, bytes: '0x33', int: 51}
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- {byte_length: 2, bytes: '0x0000', int: 0}
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- {byte_length: 2, bytes: '0x0100', int: 1}
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- {byte_length: 2, bytes: '0xffff', int: 65535}
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- {byte_length: 2, bytes: '0xedea', int: 60141}
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- {byte_length: 2, bytes: '0x2d93', int: 37677}
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- {byte_length: 2, bytes: '0x611e', int: 7777}
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- {byte_length: 2, bytes: '0x637c', int: 31843}
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- {byte_length: 2, bytes: '0xe370', int: 28899}
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- {byte_length: 2, bytes: '0x96b3', int: 45974}
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- {byte_length: 2, bytes: '0xde44', int: 17630}
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- {byte_length: 2, bytes: '0xa009', int: 2464}
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- {byte_length: 2, bytes: '0xf6ba', int: 47862}
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- {byte_length: 2, bytes: '0xef76', int: 30447}
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- {byte_length: 2, bytes: '0x7e5f', int: 24446}
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- {byte_length: 2, bytes: '0x393d', int: 15673}
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- {byte_length: 2, bytes: '0xc820', int: 8392}
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- {byte_length: 2, bytes: '0x9031', int: 12688}
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- {byte_length: 2, bytes: '0x3963', int: 25401}
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- {byte_length: 2, bytes: '0x033d', int: 15619}
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- {byte_length: 3, bytes: '0x000000', int: 0}
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- {byte_length: 3, bytes: '0x010000', int: 1}
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- {byte_length: 3, bytes: '0xffffff', int: 16777215}
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- {byte_length: 3, bytes: '0x1fdfb2', int: 11722527}
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- {byte_length: 3, bytes: '0x2a7504', int: 292138}
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- {byte_length: 3, bytes: '0x09fb20', int: 2161417}
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- {byte_length: 3, bytes: '0xa4a6b2', int: 11708068}
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- {byte_length: 3, bytes: '0x17feb7', int: 12058135}
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- {byte_length: 3, bytes: '0x3ad0b1', int: 11653178}
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- {byte_length: 3, bytes: '0xbc92c6', int: 13013692}
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- {byte_length: 3, bytes: '0xb6c046', int: 4636854}
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- {byte_length: 3, bytes: '0x937f00', int: 32659}
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- {byte_length: 3, bytes: '0x8266cb', int: 13330050}
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- {byte_length: 3, bytes: '0x8136e9', int: 15283841}
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- {byte_length: 3, bytes: '0xe9e062', int: 6480105}
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- {byte_length: 3, bytes: '0x50d054', int: 5558352}
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- {byte_length: 3, bytes: '0xb95340', int: 4215737}
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- {byte_length: 3, bytes: '0x779f52', int: 5414775}
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- {byte_length: 3, bytes: '0x15aed0', int: 13676053}
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- {byte_length: 4, bytes: '0x00000000', int: 0}
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- {byte_length: 4, bytes: '0x01000000', int: 1}
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- {byte_length: 4, bytes: '0xffffffff', int: 4294967295}
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- {byte_length: 4, bytes: '0x389cd0ca', int: 3402669112}
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- {byte_length: 4, bytes: '0xfb29dc70', int: 1893476859}
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- {byte_length: 4, bytes: '0xf5f5c999', int: 2580149749}
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- {byte_length: 4, bytes: '0xf4f0b8d1', int: 3518558452}
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- {byte_length: 4, bytes: '0x830de883', int: 2213023107}
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- {byte_length: 4, bytes: '0xe3b4e843', int: 1139324131}
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- {byte_length: 4, bytes: '0x4c9ce594', int: 2498075724}
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- {byte_length: 4, bytes: '0xa9826dab', int: 2876080809}
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- {byte_length: 4, bytes: '0xc40aecb7', int: 3085699780}
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- {byte_length: 4, bytes: '0x55490416', int: 369379669}
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- {byte_length: 4, bytes: '0x4f2eedc5', int: 3320655439}
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- {byte_length: 4, bytes: '0xdd07257e', int: 2116356061}
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- {byte_length: 4, bytes: '0x481a57e9', int: 3914799688}
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- {byte_length: 4, bytes: '0x4556a493', int: 2477020741}
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- {byte_length: 4, bytes: '0xccb781ed', int: 3984701388}
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- {byte_length: 4, bytes: '0x6b994065', int: 1698732395}
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- {byte_length: 8, bytes: '0x0000000000000000', int: 0}
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- {byte_length: 8, bytes: '0x0100000000000000', int: 1}
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- {byte_length: 8, bytes: '0xffffffff00000000', int: 4294967295}
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- {byte_length: 8, bytes: '0x77d6e31400000000', int: 350475895}
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- {byte_length: 8, bytes: '0xf3e681bf00000000', int: 3212961523}
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- {byte_length: 8, bytes: '0x62fa7bd800000000', int: 3632003682}
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- {byte_length: 8, bytes: '0x82c67b4500000000', int: 1165739650}
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- {byte_length: 8, bytes: '0x52577fba00000000', int: 3128907602}
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- {byte_length: 8, bytes: '0x5eac939b00000000', int: 2610146398}
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- {byte_length: 8, bytes: '0x12ba143700000000', int: 924105234}
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- {byte_length: 8, bytes: '0x1d3b893a00000000', int: 982072093}
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- {byte_length: 8, bytes: '0x8262153000000000', int: 806707842}
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- {byte_length: 8, bytes: '0xbb9cc58e00000000', int: 2395315387}
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- {byte_length: 8, bytes: '0x76fef6d100000000', int: 3522625142}
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- {byte_length: 8, bytes: '0x0fc3d35700000000', int: 1473495823}
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- {byte_length: 8, bytes: '0xc7f851de00000000', int: 3729914055}
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- {byte_length: 8, bytes: '0x3a1e5cb200000000', int: 2992381498}
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- {byte_length: 8, bytes: '0x3b748e3400000000', int: 881751099}
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- {byte_length: 8, bytes: '0xdc92479600000000', int: 2521273052}
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- {byte_length: 32, bytes: '0x0000000000000000000000000000000000000000000000000000000000000000',
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int: 0}
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- {byte_length: 32, bytes: '0x0100000000000000000000000000000000000000000000000000000000000000',
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int: 1}
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- {byte_length: 32, bytes: '0xffffffff00000000000000000000000000000000000000000000000000000000',
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int: 4294967295}
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- {byte_length: 32, bytes: '0x2395ad4c00000000000000000000000000000000000000000000000000000000',
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int: 1286444323}
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- {byte_length: 32, bytes: '0x38a735b800000000000000000000000000000000000000000000000000000000',
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int: 3090523960}
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- {byte_length: 32, bytes: '0x5a9416e100000000000000000000000000000000000000000000000000000000',
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int: 3776353370}
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- {byte_length: 32, bytes: '0x220f757500000000000000000000000000000000000000000000000000000000',
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int: 1970605858}
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- {byte_length: 32, bytes: '0x65bf635200000000000000000000000000000000000000000000000000000000',
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int: 1382268773}
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- {byte_length: 32, bytes: '0x033f902200000000000000000000000000000000000000000000000000000000',
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int: 579878659}
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- {byte_length: 32, bytes: '0x2b2d58ab00000000000000000000000000000000000000000000000000000000',
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int: 2874682667}
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- {byte_length: 32, bytes: '0x15af31da00000000000000000000000000000000000000000000000000000000',
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int: 3660689173}
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- {byte_length: 32, bytes: '0xd260642e00000000000000000000000000000000000000000000000000000000',
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int: 778330322}
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- {byte_length: 32, bytes: '0xcdf8429700000000000000000000000000000000000000000000000000000000',
|
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int: 2537748685}
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- {byte_length: 32, bytes: '0xc9304b0500000000000000000000000000000000000000000000000000000000',
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int: 88813769}
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- {byte_length: 32, bytes: '0xf7b7ba0200000000000000000000000000000000000000000000000000000000',
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int: 45791223}
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- {byte_length: 32, bytes: '0x1ee262d900000000000000000000000000000000000000000000000000000000',
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int: 3647136286}
|
||||
- {byte_length: 32, bytes: '0xb34b03d300000000000000000000000000000000000000000000000000000000',
|
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int: 3540208563}
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- {byte_length: 32, bytes: '0x3d52db4d00000000000000000000000000000000000000000000000000000000',
|
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int: 1306219069}
|
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- {byte_length: 32, bytes: '0xd86db47900000000000000000000000000000000000000000000000000000000',
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int: 2041867736}
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- {byte_length: 48, bytes: '0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 0}
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||||
- {byte_length: 48, bytes: '0x010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 1}
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- {byte_length: 48, bytes: '0xffffffff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 4294967295}
|
||||
- {byte_length: 48, bytes: '0x61aeae650000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 1705946721}
|
||||
- {byte_length: 48, bytes: '0xd1c08fac0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 2895102161}
|
||||
- {byte_length: 48, bytes: '0x6f36b6c90000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3384161903}
|
||||
- {byte_length: 48, bytes: '0x102f2f3b0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 992947984}
|
||||
- {byte_length: 48, bytes: '0x0f53f9240000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 620319503}
|
||||
- {byte_length: 48, bytes: '0x5c1d46b30000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3007716700}
|
||||
- {byte_length: 48, bytes: '0x955791510000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 1368479637}
|
||||
- {byte_length: 48, bytes: '0xf934170f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 253179129}
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||||
- {byte_length: 48, bytes: '0xc1a8b76f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 1874307265}
|
||||
- {byte_length: 48, bytes: '0xdf3f62c20000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 3261218783}
|
||||
- {byte_length: 48, bytes: '0xbd741bc50000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3306910909}
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||||
- {byte_length: 48, bytes: '0xfe5dc5540000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 1422220798}
|
||||
- {byte_length: 48, bytes: '0x364f10df0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 3742388022}
|
||||
- {byte_length: 48, bytes: '0x4a3909450000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 1158232394}
|
||||
- {byte_length: 48, bytes: '0xe04760380000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 945833952}
|
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- {byte_length: 48, bytes: '0x755c78540000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 1417174133}
|
||||
- {byte_length: 96, bytes: '0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 0}
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||||
- {byte_length: 96, bytes: '0x010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 1}
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- {byte_length: 96, bytes: '0xffffffff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 4294967295}
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- {byte_length: 96, bytes: '0xa3274ee20000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 3796772771}
|
||||
- {byte_length: 96, bytes: '0x1658135c0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
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int: 1544771606}
|
||||
- {byte_length: 96, bytes: '0x2af24fb30000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 3008361002}
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||||
- {byte_length: 96, bytes: '0x9e6bc40a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
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int: 180644766}
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||||
- {byte_length: 96, bytes: '0x0745b3c50000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3316860167}
|
||||
- {byte_length: 96, bytes: '0xe1b59f830000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 2208282081}
|
||||
- {byte_length: 96, bytes: '0x985a9e6e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 1855871640}
|
||||
- {byte_length: 96, bytes: '0x3d4e3a090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 154816061}
|
||||
- {byte_length: 96, bytes: '0x6f5dfb630000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 1677417839}
|
||||
- {byte_length: 96, bytes: '0x383cdecd0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3453893688}
|
||||
- {byte_length: 96, bytes: '0x38f55ceb0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3948737848}
|
||||
- {byte_length: 96, bytes: '0xcd746f5d0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 1567585485}
|
||||
- {byte_length: 96, bytes: '0x3d971e910000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 2434701117}
|
||||
- {byte_length: 96, bytes: '0x3adff0c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3237011258}
|
||||
- {byte_length: 96, bytes: '0x5ed40a710000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 1896535134}
|
||||
- {byte_length: 96, bytes: '0x755d2ed40000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
|
||||
int: 3559808373}
|
||||
Loading…
Reference in New Issue
Block a user