use core::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
use core::{cmp, mem};
use chain::keysinterface::InMemorySigner;
pub struct TestVecWriter(pub Vec<u8>);
impl Writer for TestVecWriter {
use core::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
use core::{cmp, mem};
use chain::keysinterface::InMemorySigner;
pub struct TestVecWriter(pub Vec<u8>);
impl Writer for TestVecWriter {