|
| 1 | +using BitcoinKernel.Core; |
| 2 | +using BitcoinKernel.Core.Abstractions; |
| 3 | +using BitcoinKernel.Core.Exceptions; |
| 4 | +using BitcoinKernel.Core.ScriptVerification; |
| 5 | +using BitcoinKernel.Interop.Enums; |
| 6 | +using BitcoinKernel.TestHandler.Protocol; |
| 7 | + |
| 8 | +namespace BitcoinKernel.TestHandler.Handlers; |
| 9 | + |
| 10 | +/// <summary> |
| 11 | +/// Handles script_pubkey.verify method requests. |
| 12 | +/// </summary> |
| 13 | +public class ScriptVerifyHandler |
| 14 | +{ |
| 15 | + private readonly KernelContext _context; |
| 16 | + |
| 17 | + public ScriptVerifyHandler(KernelContext context) |
| 18 | + { |
| 19 | + _context = context; |
| 20 | + } |
| 21 | + |
| 22 | + /// <summary> |
| 23 | + /// Handles a script verification request. |
| 24 | + /// </summary> |
| 25 | + public Response Handle(string requestId, ScriptVerifyParams parameters) |
| 26 | + { |
| 27 | + try |
| 28 | + { |
| 29 | + // Parse input data |
| 30 | + var scriptPubKey = ScriptPubKey.FromHex(parameters.ScriptPubKeyHex); |
| 31 | + var transaction = Transaction.FromHex(parameters.TxHex); |
| 32 | + |
| 33 | + // Parse spent outputs if provided |
| 34 | + var spentOutputs = new List<TxOut>(); |
| 35 | + if (parameters.SpentOutputs != null && parameters.SpentOutputs.Any()) |
| 36 | + { |
| 37 | + foreach (var output in parameters.SpentOutputs) |
| 38 | + { |
| 39 | + var outputScriptPubKey = ScriptPubKey.FromHex(output.ScriptPubKeyHex); |
| 40 | + spentOutputs.Add(new TxOut(outputScriptPubKey, output.Amount)); |
| 41 | + } |
| 42 | + } |
| 43 | + |
| 44 | + // Parse flags |
| 45 | + var flags = ParseFlags(parameters.Flags); |
| 46 | + |
| 47 | + // Verify the script |
| 48 | + ScriptVerifier.VerifyScript( |
| 49 | + scriptPubKey, |
| 50 | + parameters.Amount, |
| 51 | + transaction, |
| 52 | + parameters.InputIndex, |
| 53 | + spentOutputs, |
| 54 | + flags |
| 55 | + ); |
| 56 | + |
| 57 | + // Success |
| 58 | + return new Response |
| 59 | + { |
| 60 | + Id = requestId, |
| 61 | + Success = new { } |
| 62 | + }; |
| 63 | + } |
| 64 | + catch (ArgumentOutOfRangeException ex) when (ex.ParamName == "inputIndex") |
| 65 | + { |
| 66 | + return new Response |
| 67 | + { |
| 68 | + Id = requestId, |
| 69 | + Error = new ErrorResponse |
| 70 | + { |
| 71 | + Type = "ScriptVerify", |
| 72 | + Variant = "TxInputIndex" |
| 73 | + } |
| 74 | + }; |
| 75 | + } |
| 76 | + catch (ScriptVerificationException ex) |
| 77 | + { |
| 78 | + return new Response |
| 79 | + { |
| 80 | + Id = requestId, |
| 81 | + Error = new ErrorResponse |
| 82 | + { |
| 83 | + Type = "ScriptVerify", |
| 84 | + Variant = MapScriptVerifyStatus(ex.Status) |
| 85 | + } |
| 86 | + }; |
| 87 | + } |
| 88 | + catch (Exception |
| 89 | +#if DEBUG |
| 90 | + ex |
| 91 | +#endif |
| 92 | + ) |
| 93 | + { |
| 94 | + // Log to stderr for debugging (can be disabled in production) |
| 95 | +#if DEBUG |
| 96 | + Console.Error.WriteLine($"Exception: {ex.GetType().Name}: {ex.Message}"); |
| 97 | + Console.Error.WriteLine($"StackTrace: {ex.StackTrace}"); |
| 98 | +#endif |
| 99 | + |
| 100 | + // Generic error for unexpected exceptions |
| 101 | + return new Response |
| 102 | + { |
| 103 | + Id = requestId, |
| 104 | + Error = new ErrorResponse |
| 105 | + { |
| 106 | + Type = "ScriptVerify", |
| 107 | + Variant = "Invalid" |
| 108 | + } |
| 109 | + }; |
| 110 | + } |
| 111 | + } |
| 112 | + |
| 113 | + /// <summary> |
| 114 | + /// Parses flags from either uint or string format. |
| 115 | + /// </summary> |
| 116 | + private ScriptVerificationFlags ParseFlags(object? flags) |
| 117 | + { |
| 118 | + if (flags == null) |
| 119 | + return ScriptVerificationFlags.None; |
| 120 | + |
| 121 | + // Handle numeric flags |
| 122 | + if (flags is uint or int or long) |
| 123 | + { |
| 124 | + return (ScriptVerificationFlags)Convert.ToUInt32(flags); |
| 125 | + } |
| 126 | + |
| 127 | + // Handle System.Text.Json JsonElement |
| 128 | + if (flags.GetType().Name == "JsonElement") |
| 129 | + { |
| 130 | + var jsonElement = (System.Text.Json.JsonElement)flags; |
| 131 | + if (jsonElement.ValueKind == System.Text.Json.JsonValueKind.Number) |
| 132 | + { |
| 133 | + return (ScriptVerificationFlags)jsonElement.GetUInt32(); |
| 134 | + } |
| 135 | + else if (jsonElement.ValueKind == System.Text.Json.JsonValueKind.String) |
| 136 | + { |
| 137 | + return ParseFlagString(jsonElement.GetString() ?? string.Empty); |
| 138 | + } |
| 139 | + } |
| 140 | + |
| 141 | + // Handle string flags |
| 142 | + if (flags is string flagStr) |
| 143 | + { |
| 144 | + return ParseFlagString(flagStr); |
| 145 | + } |
| 146 | + |
| 147 | + return ScriptVerificationFlags.None; |
| 148 | + } |
| 149 | + |
| 150 | + /// <summary> |
| 151 | + /// Parses a string flag name to ScriptVerificationFlags. |
| 152 | + /// </summary> |
| 153 | + private ScriptVerificationFlags ParseFlagString(string flagStr) |
| 154 | + { |
| 155 | + return flagStr.ToUpperInvariant() switch |
| 156 | + { |
| 157 | + "VERIFY_NONE" or "NONE" => ScriptVerificationFlags.None, |
| 158 | + "VERIFY_P2SH" or "P2SH" => ScriptVerificationFlags.P2SH, |
| 159 | + "VERIFY_DERSIG" or "DERSIG" => ScriptVerificationFlags.DerSig, |
| 160 | + "VERIFY_NULLDUMMY" or "NULLDUMMY" => ScriptVerificationFlags.NullDummy, |
| 161 | + "VERIFY_CHECKLOCKTIMEVERIFY" or "CHECKLOCKTIMEVERIFY" => ScriptVerificationFlags.CheckLockTimeVerify, |
| 162 | + "VERIFY_CHECKSEQUENCEVERIFY" or "CHECKSEQUENCEVERIFY" => ScriptVerificationFlags.CheckSequenceVerify, |
| 163 | + "VERIFY_WITNESS" or "WITNESS" => ScriptVerificationFlags.Witness, |
| 164 | + "VERIFY_TAPROOT" or "TAPROOT" => ScriptVerificationFlags.Taproot, |
| 165 | + "VERIFY_ALL" or "ALL" => ScriptVerificationFlags.All, |
| 166 | + "VERIFY_ALL_PRE_TAPROOT" or "ALL_PRE_TAPROOT" => ScriptVerificationFlags.AllPreTaproot, |
| 167 | + _ => throw new ArgumentException($"Unknown flag: {flagStr}") |
| 168 | + }; |
| 169 | + } |
| 170 | + |
| 171 | + /// <summary> |
| 172 | + /// Maps ScriptVerifyStatus to error variant strings. |
| 173 | + /// </summary> |
| 174 | + private string MapScriptVerifyStatus(ScriptVerifyStatus status) |
| 175 | + { |
| 176 | + return status switch |
| 177 | + { |
| 178 | + ScriptVerifyStatus.ERROR_TX_INPUT_INDEX => "TxInputIndex", |
| 179 | + ScriptVerifyStatus.ERROR_INVALID_FLAGS => "InvalidFlags", |
| 180 | + ScriptVerifyStatus.ERROR_INVALID_FLAGS_COMBINATION => "InvalidFlagsCombination", |
| 181 | + ScriptVerifyStatus.ERROR_SPENT_OUTPUTS_MISMATCH => "SpentOutputsMismatch", |
| 182 | + ScriptVerifyStatus.ERROR_SPENT_OUTPUTS_REQUIRED => "SpentOutputsRequired", |
| 183 | + _ => "Invalid" |
| 184 | + }; |
| 185 | + } |
| 186 | +} |
0 commit comments