|
| 1 | +# Closing a Channel |
| 2 | + |
| 3 | +Closing Channel using Custom KeysManager. (Single Fees) |
| 4 | + |
| 5 | +<CodeSwitcher :languages="{rust:'Rust', java:'Java', swift:'Swift'}"> |
| 6 | + <template v-slot:rust> |
| 7 | + |
| 8 | +```rust |
| 9 | +// TODO: Add Rust Code Here |
| 10 | +``` |
| 11 | + |
| 12 | + </template> |
| 13 | + <template v-slot:java> |
| 14 | + |
| 15 | +```java |
| 16 | +// TODO: Add Java Code Here |
| 17 | +``` |
| 18 | + |
| 19 | + </template> |
| 20 | + <template v-slot:swift> |
| 21 | + |
| 22 | +```Swift |
| 23 | +class MyKeysManager { |
| 24 | + let keysManager: KeysManager |
| 25 | + let signerProvider: MySignerProvider // Use signerProvider instead of asSignerProvider() |
| 26 | + let wallet: Wallet |
| 27 | + |
| 28 | + init(seed: [UInt8], startingTimeSecs: UInt64, startingTimeNanos: UInt32, wallet: Wallet) { |
| 29 | + self.keysManager = KeysManager(seed: seed, startingTimeSecs: startingTimeSecs, startingTimeNanos: startingTimeNanos) |
| 30 | + self.wallet = wallet |
| 31 | + signerProvider = MySignerProvider() |
| 32 | + signerProvider.myKeysManager = self |
| 33 | + } |
| 34 | +} |
| 35 | + |
| 36 | +class MySignerProvider: SignerProvider { |
| 37 | + weak var myKeysManager: MyKeysManager? |
| 38 | + override func deriveChannelSigner(channelValueSatoshis: UInt64, channelKeysId: [UInt8]) -> Bindings.WriteableEcdsaChannelSigner { |
| 39 | + return myKeysManager!.keysManager.asSignerProvider().deriveChannelSigner(channelValueSatoshis: channelValueSatoshis, channelKeysId: channelKeysId) |
| 40 | + } |
| 41 | + |
| 42 | + override func generateChannelKeysId(inbound: Bool, channelValueSatoshis: UInt64, userChannelId: [UInt8]) -> [UInt8] { |
| 43 | + return myKeysManager!.keysManager.asSignerProvider().generateChannelKeysId(inbound: inbound, channelValueSatoshis: channelValueSatoshis, userChannelId: userChannelId) |
| 44 | + } |
| 45 | + |
| 46 | + override func readChanSigner(reader: [UInt8]) -> Bindings.Result_WriteableEcdsaChannelSignerDecodeErrorZ { |
| 47 | + return myKeysManager!.keysManager.asSignerProvider().readChanSigner(reader: reader) |
| 48 | + } |
| 49 | + |
| 50 | + override func getDestinationScript() -> [UInt8] { |
| 51 | + do { |
| 52 | + let address = try myKeysManager!.wallet.getAddress(addressIndex: .new) |
| 53 | + return address.address.scriptPubkey().toBytes() |
| 54 | + } catch { |
| 55 | + return myKeysManager!.keysManager.asSignerProvider().getDestinationScript() |
| 56 | + } |
| 57 | + } |
| 58 | + |
| 59 | + override func getShutdownScriptpubkey() -> Bindings.ShutdownScript { |
| 60 | + do { |
| 61 | + let address = try myKeysManager!.wallet.getAddress(addressIndex: .new).address |
| 62 | + let payload = address.payload() |
| 63 | + if case let .witnessProgram(`version`, `program`) = payload { |
| 64 | + let ver: UInt8 |
| 65 | + switch version { |
| 66 | + case .v0: |
| 67 | + ver = 0 |
| 68 | + case .v1: |
| 69 | + ver = 1 |
| 70 | + case .v2: |
| 71 | + ver = 2 |
| 72 | + case .v3: |
| 73 | + ver = 3 |
| 74 | + case .v4: |
| 75 | + ver = 4 |
| 76 | + case .v5: |
| 77 | + ver = 5 |
| 78 | + case .v6: |
| 79 | + ver = 6 |
| 80 | + case .v7: |
| 81 | + ver = 7 |
| 82 | + case .v8: |
| 83 | + ver = 8 |
| 84 | + case .v9: |
| 85 | + ver = 9 |
| 86 | + case .v10: |
| 87 | + ver = 10 |
| 88 | + case .v11: |
| 89 | + ver = 11 |
| 90 | + case .v12: |
| 91 | + ver = 12 |
| 92 | + case .v13: |
| 93 | + ver = 13 |
| 94 | + case .v14: |
| 95 | + ver = 14 |
| 96 | + case .v15: |
| 97 | + ver = 15 |
| 98 | + case .v16: |
| 99 | + ver = 16 |
| 100 | + } |
| 101 | + let res = ShutdownScript.newWitnessProgram(version: ver, program: program) |
| 102 | + if res.isOk() { |
| 103 | + return res.getValue()! |
| 104 | + } |
| 105 | + } |
| 106 | + return myKeysManager!.keysManager.asSignerProvider().getShutdownScriptpubkey() |
| 107 | + } catch { |
| 108 | + return myKeysManager!.keysManager.asSignerProvider().getShutdownScriptpubkey() |
| 109 | + } |
| 110 | + } |
| 111 | +} |
| 112 | +``` |
| 113 | + |
| 114 | + </template> |
| 115 | +</CodeSwitcher> |
| 116 | + |
| 117 | +Closing Channel using Events. (Double Fees) |
| 118 | + |
| 119 | +<CodeSwitcher :languages="{rust:'Rust', java:'Java', swift:'Swift'}"> |
| 120 | + <template v-slot:rust> |
| 121 | + |
| 122 | +```rust |
| 123 | +// TODO: Add Rust Code Here |
| 124 | +``` |
| 125 | + |
| 126 | + </template> |
| 127 | + <template v-slot:java> |
| 128 | + |
| 129 | +```java |
| 130 | +// TODO: Add Java Code Here |
| 131 | +``` |
| 132 | + |
| 133 | + </template> |
| 134 | + <template v-slot:swift> |
| 135 | + |
| 136 | +```Swift |
| 137 | +func handleEvent(event: Event) { |
| 138 | + if let event = event.getValueAsSpendableOutputs() { |
| 139 | + let outputs = event.getOutputs() |
| 140 | + do { |
| 141 | + let address = ldkManager!.bdkManager.getAddress(addressIndex: .new)! |
| 142 | + let script = try Address(address: address).scriptPubkey().toBytes() |
| 143 | + let res = ldkManager?.keysManager?.spendSpendableOutputs(descriptors: outputs, outputs: [], changeDestinationScript: script, feerateSatPer1000Weight: 1000) |
| 144 | + if res!.isOk() { |
| 145 | + ldkManager.broadcaster.broadcastTransaction(tx: res!.getValue()!) |
| 146 | + } |
| 147 | + } catch { |
| 148 | + print(error) |
| 149 | + } |
| 150 | + } |
| 151 | +} |
| 152 | +``` |
| 153 | + |
| 154 | + </template> |
| 155 | + |
| 156 | +</CodeSwitcher> |
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