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Merge remote-tracking branch 'origin/dart-examples-lsp-fiat-fee' into python-examples

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ruben beck
2023-07-11 20:12:36 +02:00
parent f74705f627 39682c55e4
commit 1ad000c0d1
1 changed files with 32 additions and 15 deletions
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src/guide/receive_onchain.md
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@@ -290,12 +290,30 @@ result, err := sdkServices.Refund(refundable.BitcoinAddress, destinationAddress,
<div slot="title">Dart</div>
<section>
To calculate fees, you'll need to detect if channel opening fees are needed first and then calculate the fee for the amount you'll be receiving.
```dart
int calculateChannelOpeningFee(int amountSats) {
int calculateChannelOpeningFee(int amountSats) async {
bool isChannelOpeningFeeNeeded = await isChannelOpeningFeeNeeded(amountSats);
return isChannelOpeningFeeNeeded ? calculateFeesForAmount(amountSats) : 0;
}
```
How to detect if open channel fees are needed.
```dart
bool isChannelOpeningFeeNeeded(int amountSats) async {
NodeState? nodeState = await getNodeState();
int liquidity = nodeState.inboundLiquidityMsats ~/ 1000;
// Check if we need to open channel
if(amountSats >= liquidity) {
return amountSats >= liquidity;
}
```
How to calculate the fee for a specific amount.
```dart
int calculateFeesForAmount(int amountSats) async {
// We need to open channel so we are calculating the fees for the LSP
String? lspId = await getLspId();
LSPInformation? lspInformation = await fetchLspInfo(lspId!);
@@ -309,7 +327,6 @@ int calculateChannelOpeningFee(int amountSats) {
int channelFeesMsat = (amountSats * setupFee ~/ 100);
// If the proportional fee is smaller than minimum fees, minimum fees is selected.
return max(channelFeesMsat, minFee);
}
}
```
</section>