gl-plugin: Skip JIT channel negotiation when sufficient capacity exists #658
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Before creating an LSPS2 invoice that requires JIT channel negotiation, check if the node already has sufficient incoming capacity to receive the payment directly. When the receivable capacity (with a 5% buffer for fees) exceeds the invoice amount, create a regular invoice instead of negotiating with the LSP. This avoids unnecessary LSP fees and channel opening costs when the node can already receive the payment. The capacity check: - Sums receivable_msat across all CHANNELD_NORMAL channels with connected peers - Applies a 5% buffer to account for routing fees - Falls back to JIT negotiation if capacity is insufficient or for 'any amount' invoices
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Before creating an LSPS2 invoice that requires JIT channel negotiation, check if the node already has sufficient incoming capacity to receive the payment directly.
When the receivable capacity (with a 5% buffer for fees) exceeds the invoice amount, create a regular invoice instead of negotiating with the LSP. This avoids unnecessary LSP fees and channel opening costs when the node can already receive the payment.
The capacity check: