static TapBranch GetBranchData(ErrorHandle handle, TreeHandle treeHandle)
{
TapBranch branch = new TapBranch();
var ret = NativeMethods.CfdGetTapBranchCount(
handle.GetHandle(), treeHandle.GetHandle(), out uint count);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
TapBranch[] branchList = new TapBranch[count];
ret = NativeMethods.CfdGetBaseTapLeaf(handle.GetHandle(),
treeHandle.GetHandle(), out byte leafVersion,
out IntPtr tapscript, out IntPtr tapLeafHash);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
string tapscriptStr = CCommon.ConvertToString(tapscript);
string tapLeafHashStr = CCommon.ConvertToString(tapLeafHash);
if (count == 0)
{
branch.topHash = new ByteData256(tapLeafHashStr);
}
branch.branches = branchList;
if (tapscriptStr.Length != 0)
{
branch.tapscript = new Script(tapscriptStr);
branch.leafVersion = leafVersion;
branch.targetNodes = new ByteData256[count];
}
branch.UpdateBranchData(handle, treeHandle);
return(branch);
}
internal void Load(ErrorHandle handle, TreeHandle treeHandle)
{
if (handle is null)
{
throw new ArgumentNullException(nameof(handle));
}
if (treeHandle is null)
{
throw new ArgumentNullException(nameof(treeHandle));
}
string nodes = "";
foreach (var node in targetNodes)
{
nodes += node.ToHexString();
}
var ret = NativeMethods.CfdSetScriptTreeFromString(handle.GetHandle(),
treeHandle.GetHandle(), treeString, tapscript.ToHexString(), leafVersion, nodes);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
}
/// <summary>
/// Get taproot data.
/// </summary>
/// <param name="internalPubkey">internal pubkey</param>
/// <returns>taproot data</returns>
public TaprootScriptData GetTaprootData(SchnorrPubkey internalPubkey)
{
if (internalPubkey is null)
{
throw new ArgumentNullException(nameof(internalPubkey));
}
using (var handle = new ErrorHandle())
using (var treeHandle = new TreeHandle(handle))
{
Load(handle, treeHandle);
var ret = NativeMethods.CfdGetTaprootScriptTreeHash(
handle.GetHandle(), treeHandle.GetHandle(), internalPubkey.ToHexString(),
out IntPtr witnessProgram, out IntPtr tapLeafHashPtr, out IntPtr controlBlockStr);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
var witnessProgramStr = CCommon.ConvertToString(witnessProgram);
var tapLeafHash = CCommon.ConvertToString(tapLeafHashPtr);
var controlBlock = CCommon.ConvertToString(controlBlockStr);
return(new TaprootScriptData(
new SchnorrPubkey(witnessProgramStr), new ByteData(controlBlock),
new ByteData256(tapLeafHash), GetTapScript()));
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="controlBlock">control block</param>
/// <param name="tapscript">tapscript</param>
public TaprootScriptTree(ByteData controlBlock, Script tapscript)
{
if (controlBlock is null)
{
throw new ArgumentNullException(nameof(controlBlock));
}
if (tapscript is null)
{
throw new ArgumentNullException(nameof(tapscript));
}
using (var handle = new ErrorHandle())
using (var treeHandle = new TreeHandle(handle))
{
var ret = NativeMethods.CfdSetTapScriptByWitnessStack(handle.GetHandle(),
treeHandle.GetHandle(), controlBlock.ToHexString(), tapscript.ToHexString(),
out IntPtr internalPubkeyPtr);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
internalPubkey = new SchnorrPubkey(CCommon.ConvertToString(internalPubkeyPtr));
GetAllData(handle, treeHandle);
}
}
void UpdateAllData(ErrorHandle handle, TreeHandle treeHandle)
{
var ret = NativeMethods.CfdGetTapBranchCount(
handle.GetHandle(), treeHandle.GetHandle(), out uint count);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
TapBranch[] branchList = new TapBranch[count];
var offset = branches.Length;
for (var index = offset; index < count; ++index)
{
ret = NativeMethods.CfdGetTapBranchHandle(
handle.GetHandle(), treeHandle.GetHandle(), (byte)index,
out IntPtr branchHash, out IntPtr branchTreeHandle);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
CCommon.ConvertToString(branchHash);
using (var branchHandle = new TreeHandle(handle, branchTreeHandle))
{
TapBranch branch = new TapBranch();
branch.GetAllData(handle, branchHandle);
branchList[index] = branch;
}
}
if (count != 0)
{
var newTargetNodes = new ByteData256[count];
for (var index = 0; index < offset; ++index)
{
branchList[index] = branches[index];
newTargetNodes[index] = targetNodes[index];
}
for (var index = offset; index < count; ++index)
{
newTargetNodes[index] = branchList[index].topHash;
}
branches = branchList;
targetNodes = newTargetNodes;
}
UpdateBranchData(handle, treeHandle);
}
void UpdateBranchData(ErrorHandle handle, TreeHandle treeHandle)
{
if (handle is null)
{
throw new ArgumentNullException(nameof(handle));
}
if (treeHandle is null)
{
throw new ArgumentNullException(nameof(treeHandle));
}
var ret = NativeMethods.CfdGetTaprootScriptTreeSrting(handle.GetHandle(),
treeHandle.GetHandle(), out IntPtr treeString);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
this.treeString = CCommon.ConvertToString(treeString);
if (branches.Length != 0)
{
var index = branches.Length - 1;
ret = NativeMethods.CfdGetTapBranchData(handle.GetHandle(),
treeHandle.GetHandle(), (byte)index, true, out IntPtr branchHash,
out _, out IntPtr tempScript, out byte _);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
CCommon.ConvertToString(tempScript);
topHash = new ByteData256(CCommon.ConvertToString(branchHash));
}
else if (topHash.IsEmpty())
{
ret = NativeMethods.CfdGetBaseTapLeaf(handle.GetHandle(),
treeHandle.GetHandle(), out byte _,
out IntPtr tapscript, out IntPtr tapLeafHash);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
CCommon.ConvertToString(tapscript);
string tapLeafHashStr = CCommon.ConvertToString(tapLeafHash);
topHash = new ByteData256(tapLeafHashStr);
}
}
internal void GetAllData(ErrorHandle handle, TreeHandle treeHandle)
{
var tree = GetBranchData(handle, treeHandle);
var count = tree.branches.Length;
TapBranch[] branchList = new TapBranch[count];
ByteData256[] nodeList = new ByteData256[count];
for (var index = 0; index < count; ++index)
{
var ret = NativeMethods.CfdGetTapBranchHandle(
handle.GetHandle(), treeHandle.GetHandle(), (byte)index,
out IntPtr branchHash, out IntPtr branchTreeHandle);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
CCommon.ConvertToString(branchHash);
using (var branchHandle = new TreeHandle(handle, branchTreeHandle))
{
TapBranch branch = new TapBranch();
branch.GetAllData(handle, branchHandle);
branchList[index] = branch;
}
}
if (count != 0)
{
branches = branchList;
}
topHash = tree.topHash;
treeString = tree.treeString;
if (!tree.tapscript.IsEmpty())
{
tapscript = tree.tapscript;
leafVersion = tree.leafVersion;
for (var index = 0; index < count; ++index)
{
nodeList[index] = branchList[index].topHash;
}
targetNodes = nodeList;
}
}
/// <summary>
/// Add branches.
/// </summary>
/// <param name="treeStringList">tree string list</param>
public void AddBranches(string[] treeStringList)
{
if (treeStringList is null)
{
throw new ArgumentNullException(nameof(treeStringList));
}
using (var handle = new ErrorHandle())
using (var treeHandle = new TreeHandle(handle))
{
Load(handle, treeHandle);
foreach (var treeStr in treeStringList)
{
var ret = NativeMethods.CfdAddTapBranchByScriptTreeString(
handle.GetHandle(), treeHandle.GetHandle(), treeStr);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
}
UpdateAllData(handle, treeHandle);
}
}
/// <summary>
/// Get tweaked privkey from internal privkey.
/// </summary>
/// <param name="privkey">internal privkey.</param>
/// <returns>tweaked privkey.</returns>
public Privkey GetTweakedPrivkey(Privkey privkey)
{
if (privkey is null)
{
throw new ArgumentNullException(nameof(privkey));
}
using (var handle = new ErrorHandle())
using (var treeHandle = new TreeHandle(handle))
{
Load(handle, treeHandle);
var ret = NativeMethods.CfdGetTaprootTweakedPrivkey(
handle.GetHandle(), treeHandle.GetHandle(), privkey.ToHexString(),
out IntPtr tweakedPrivkey);
if (ret != CfdErrorCode.Success)
{
handle.ThrowError(ret);
}
var tweakedPrivkeyStr = CCommon.ConvertToString(tweakedPrivkey);
return(new Privkey(tweakedPrivkeyStr));
}
}