/// <summary>
/// Gets the deployment flags to set when the deployment activates.
/// </summary>
/// <param name="deployment">The deployment number.</param>
/// <returns>The deployment flags.</returns>
public override BIP9DeploymentFlags GetFlags(int deployment)
{
// The flags get combined in the caller, so it is ok to make a fresh object here.
var flags = new BIP9DeploymentFlags();
switch (deployment)
{
case ColdStaking:
flags.ScriptFlags = ScriptVerify.CheckColdStakeVerify;
break;
case CSV:
// Start enforcing BIP68 (sequence locks), BIP112 (CHECKSEQUENCEVERIFY) and BIP113 (Median Time Past) using versionbits logic.
flags.ScriptFlags = ScriptVerify.CheckSequenceVerify;
flags.LockTimeFlags = Transaction.LockTimeFlags.VerifySequence | Transaction.LockTimeFlags.MedianTimePast;
break;
case Segwit:
// Start enforcing WITNESS rules using versionbits logic.
flags.ScriptFlags = ScriptVerify.Witness;
break;
}
return(flags);
}
public DeploymentFlags(ChainedHeader nextBlock, ThresholdState[] prevBlockStates, IConsensus chainparams, ConcurrentChain chain)
{
this.EnforceBIP30 = EnforceBIP30ForBlock(nextBlock);
// Once BIP34 activated it was not possible to create new duplicate coinbases and thus other than starting
// with the 2 existing duplicate coinbase pairs, not possible to create overwriting txs. But by the
// time BIP34 activated, in each of the existing pairs the duplicate coinbase had overwritten the first
// before the first had been spent. Since those coinbases are sufficiently buried its no longer possible to create further
// duplicate transactions descending from the known pairs either.
// If we're on the known chain at height greater than where BIP34 activated, we can save the db accesses needed for the BIP30 check.
ChainedHeader bip34HeightChainedHeader = chain.GetBlock(chainparams.BuriedDeployments[BuriedDeployments.BIP34]);
// Only continue to enforce if we're below BIP34 activation height or the block hash at that height doesn't correspond.
this.EnforceBIP30 = this.EnforceBIP30 && ((bip34HeightChainedHeader == null) || !(bip34HeightChainedHeader.HashBlock == chainparams.BIP34Hash));
// BIP16 didn't become active until Apr 1 2012.
DateTimeOffset nBIP16SwitchTime = Utils.UnixTimeToDateTime(1333238400);
bool fStrictPayToScriptHash = (nextBlock.Header.BlockTime >= nBIP16SwitchTime);
this.ScriptFlags = fStrictPayToScriptHash ? ScriptVerify.P2SH : ScriptVerify.None;
// Start enforcing the DERSIG (BIP66) rule.
if (nextBlock.Height >= chainparams.BuriedDeployments[BuriedDeployments.BIP66])
{
this.ScriptFlags |= ScriptVerify.DerSig;
}
// Start enforcing CHECKLOCKTIMEVERIFY, (BIP65) for block.nVersion=4
// blocks, when 75% of the network has upgraded.
if (nextBlock.Height >= chainparams.BuriedDeployments[BuriedDeployments.BIP65])
{
this.ScriptFlags |= ScriptVerify.CheckLockTimeVerify;
}
// Set the relevant flags for active BIP9 deployments.
for (int deployment = 0; deployment < prevBlockStates.Length; deployment++)
{
if (prevBlockStates[deployment] == ThresholdState.Active)
{
BIP9DeploymentFlags flags = chain.Network.Consensus.BIP9Deployments.GetFlags(deployment);
this.ScriptFlags |= flags.ScriptFlags;
this.LockTimeFlags |= flags.LockTimeFlags;
}
}
// Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
if (nextBlock.Height >= chainparams.BuriedDeployments[BuriedDeployments.BIP34])
{
this.EnforceBIP34 = true;
}
}
/// <summary>
/// Gets the deployment flags to set when the deployment activates.
/// </summary>
/// <param name="deployment">The deployment number.</param>
/// <returns>The deployment flags.</returns>
public override BIP9DeploymentFlags GetFlags(int deployment)
{
var flags = new BIP9DeploymentFlags();
switch (deployment)
{
case ColdStaking:
flags.ScriptFlags |= ScriptVerify.CheckColdStakeVerify;
break;
}
return(flags);
}
/// <summary>
/// Gets the deployment flags to set when the deployment activates.
/// </summary>
/// <param name="deployment">The deployment number.</param>
/// <returns>The deployment flags.</returns>
public override BIP9DeploymentFlags GetFlags(int deployment)
{
BIP9DeploymentFlags flags = new BIP9DeploymentFlags();
switch (deployment)
{
case CSV:
// Start enforcing BIP68 (sequence locks), BIP112 (CHECKSEQUENCEVERIFY) and BIP113 (Median Time Past) using versionbits logic.
flags.ScriptFlags = ScriptVerify.CheckSequenceVerify;
flags.LockTimeFlags = Transaction.LockTimeFlags.VerifySequence | Transaction.LockTimeFlags.MedianTimePast;
break;
case Segwit:
// Start enforcing WITNESS rules using versionbits logic.
flags.ScriptFlags = ScriptVerify.Witness;
break;
}
return(flags);
}
public DeploymentFlags(ChainedHeader nextBlock, ThresholdState[] prevBlockStates, IConsensus chainparams, ChainIndexer chainIndexer)
{
this.EnforceBIP30 = EnforceBIP30ForBlock(nextBlock, chainparams, chainIndexer);
// BIP16 didn't become active until Apr 1 2012.
DateTimeOffset nBIP16SwitchTime = Utils.UnixTimeToDateTime(1333238400);
bool fStrictPayToScriptHash = (nextBlock.Header.BlockTime >= nBIP16SwitchTime);
this.ScriptFlags = fStrictPayToScriptHash ? ScriptVerify.P2SH : ScriptVerify.None;
// Start enforcing the DERSIG (BIP66) rule.
if (nextBlock.Height >= chainparams.BuriedDeployments[BuriedDeployments.BIP66])
{
this.ScriptFlags |= ScriptVerify.DerSig;
}
// Start enforcing CHECKLOCKTIMEVERIFY, (BIP65) for block.nVersion=4
// blocks, when 75% of the network has upgraded.
if (nextBlock.Height >= chainparams.BuriedDeployments[BuriedDeployments.BIP65])
{
this.ScriptFlags |= ScriptVerify.CheckLockTimeVerify;
}
// Set the relevant flags for active BIP9 deployments.
for (int deployment = 0; deployment < prevBlockStates.Length; deployment++)
{
if (prevBlockStates[deployment] == ThresholdState.Active)
{
BIP9DeploymentFlags flags = chainIndexer.Network.Consensus.BIP9Deployments.GetFlags(deployment);
this.ScriptFlags |= flags.ScriptFlags;
this.LockTimeFlags |= flags.LockTimeFlags;
}
}
// Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
if (nextBlock.Height >= chainparams.BuriedDeployments[BuriedDeployments.BIP34])
{
this.EnforceBIP34 = true;
}
}
