Enable Liquid discount fees CT

Author: angelix

common/src/commonMain/kotlin/com/blockstream/common/gdk/GdkSession.kt

@@ -676,6 +676,7 @@ class GdkSession constructor(
             proxy = applicationSettings.proxyUrl ?: "",
             spvEnabled = spvEnabled,
             spvMulti = spvMulti,
+            discountFees = true, // Liquid Discount fees CT
             gapLimit = if(electrumUrl.isNotBlank() && network.isSinglesig) applicationSettings.electrumServerGapLimit?.coerceAtLeast(20) else null,
             electrumTls = if(electrumUrl.isNotBlank()) applicationSettings.personalElectrumServerTls else true,
             electrumUrl = electrumUrl,

common/src/commonMain/kotlin/com/blockstream/common/gdk/params/ConnectionParams.kt

@@ -22,6 +22,7 @@ data class ConnectionParams constructor(
     @SerialName("blob_server_url") val blobServerUrl: String? = null,
     @SerialName("blob_server_onion_url") val blobServerOnionUrl: String? = null,
     @SerialName("gap_limit") val gapLimit: Int? = null,
+    @SerialName("discount_fees") val discountFees: Boolean = false,
 ) : GreenJson<ConnectionParams>() {
 
     override fun encodeDefaultsValues() = false