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A Kotlin Multiplatform implementation of the Lightning Network
package fr.acinq.lightning
import fr.acinq.bitcoin.ByteVector32
import fr.acinq.bitcoin.ByteVector64
import fr.acinq.bitcoin.KeyPath
import fr.acinq.bitcoin.PrivateKey
import fr.acinq.lightning.utils.secure
import kotlin.experimental.xor
import kotlin.random.Random
object Lightning {
val secureRandom = Random.secure()
fun randomBytes(length: Int): ByteArray {
val buffer = ByteArray(length)
secureRandom.nextBytes(buffer)
return buffer
}
fun randomBytes32(): ByteVector32 = ByteVector32(randomBytes(32))
fun randomBytes64(): ByteVector64 = ByteVector64(randomBytes(64))
fun randomKey(): PrivateKey = PrivateKey(randomBytes32())
/**
* @param baseFee fixed fee
* @param proportionalFee proportional fee (millionths)
* @param paymentAmount payment amount in millisatoshi
* @return the fee that a node should be paid to forward an HTLC of 'paymentAmount' millisatoshis
*/
fun nodeFee(baseFee: MilliSatoshi, proportionalFee: Long, paymentAmount: MilliSatoshi): MilliSatoshi = baseFee + (paymentAmount * proportionalFee) / 1_000_000
}
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