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Merge #213

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213: Properly calculate the confirmations for Bitcoin tx r=da-kami a=da-kami

Once the transaction was included into a block it has one confirmation - before inclusion it has zero.
current-block-height - transaction-block-height = zero; but that means one confirmation.
Hence, the confirmation calculation was adapted to: Current-block-height - (transaction-block-height - 1).

I could not think of a more elegant solution - if you have one please comment :)

Co-authored-by: Daniel Karzel <daniel@comit.network>
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bors[bot] 2021-02-21 23:30:17 +00:00 committed by GitHub
commit c4df3fdcbc
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1 changed files with 5 additions and 1 deletions
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6
swap/src/bitcoin/wallet.rs
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@ -273,7 +273,11 @@ impl WaitForTransactionFinality for Wallet {
tracing::debug!("tx_block_height: {:?}", tx_block_height);
let block_height = self.get_block_height().await?;
tracing::debug!("latest_block_height: {:?}", block_height);
if let Some(confirmations) = block_height.checked_sub(tx_block_height) {
if let Some(confirmations) = block_height.checked_sub(
tx_block_height
.checked_sub(BlockHeight::new(1))
.expect("transaction must be included in block with height >= 1"),
) {
tracing::debug!("confirmations: {:?}", confirmations);
if u32::from(confirmations) >= execution_params.bitcoin_finality_confirmations {
break;