49 lines
1.1 KiB
Rust
49 lines
1.1 KiB
Rust
// De-facto standard "dust limit" (even though it should change based on the output type)
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const DUST_LIMIT_SATOSHI: u64 = 546;
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// we implement this trait to make sure we don't mess up the comparison with off-by-one like a <
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// instead of a <= etc. The constant value for the dust limit is not public on purpose, to
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// encourage the usage of this trait.
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pub trait IsDust {
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fn is_dust(&self) -> bool;
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}
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impl IsDust for u64 {
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fn is_dust(&self) -> bool {
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*self <= DUST_LIMIT_SATOSHI
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}
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}
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pub struct ChunksIterator<I: Iterator> {
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iter: I,
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size: usize,
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}
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impl<I: Iterator> ChunksIterator<I> {
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pub fn new(iter: I, size: usize) -> Self {
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ChunksIterator { iter, size }
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}
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}
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impl<I: Iterator> Iterator for ChunksIterator<I> {
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type Item = Vec<<I as std::iter::Iterator>::Item>;
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fn next(&mut self) -> Option<Self::Item> {
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let mut v = Vec::new();
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for _ in 0..self.size {
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let e = self.iter.next();
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match e {
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None => break,
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Some(val) => v.push(val),
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}
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}
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if v.is_empty() {
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return None;
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}
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Some(v)
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}
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}
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