/// <inheritdoc/>
public async Task <FeeAgreePayload> MultiSigMemberAgreedOnInteropFeeAsync(string requestId, ulong feeAmount, PubKey pubKey)
{
using (await this.asyncLockObject.LockAsync().ConfigureAwait(false))
{
// If this node does not have this conversion request fee, return and wait for the matured blocks sync manager to find it.
InteropConversionRequestFee interopConversionRequestFee = GetInteropConversionRequestFeeLocked(requestId);
if (interopConversionRequestFee == null || (interopConversionRequestFee != null && interopConversionRequestFee.State == InteropFeeState.ProposalInProgress))
{
return(null);
}
// Check if the vote is still in progress and that the incoming node still has to vote on this fee.
if (!HasFeeVoteBeenConcluded(interopConversionRequestFee) && !interopConversionRequestFee.FeeVotes.Any(p => p.PubKey == pubKey.ToHex()))
{
interopConversionRequestFee.FeeVotes.Add(new InterOpFeeToMultisig()
{
BlockHeight = interopConversionRequestFee.BlockHeight, PubKey = pubKey.ToHex(), FeeAmount = feeAmount
});
this.interopRequestKeyValueStore.SaveValueJson(interopConversionRequestFee.RequestId, interopConversionRequestFee, true);
this.logger.LogDebug($"Received conversion request fee vote '{requestId}' from '{pubKey} for a fee of {new Money(feeAmount)}.");
}
// This node would have voted on this if the InteropConversionRequestFee object exists.
InterOpFeeToMultisig myVote = interopConversionRequestFee.FeeVotes.FirstOrDefault(p => p.PubKey == this.federationManager.CurrentFederationKey.PubKey.ToHex());
if (myVote == null)
{
return(null);
}
string signature = this.federationManager.CurrentFederationKey.SignMessage(interopConversionRequestFee.RequestId + myVote.FeeAmount);
return(FeeAgreePayload.Reply(interopConversionRequestFee.RequestId, myVote.FeeAmount, interopConversionRequestFee.BlockHeight, signature));
}
}
private async Task ProcessFeeAgreeAsync(FeeAgreePayload payload)
{
if (!this.federationManager.IsFederationMember)
{
return;
}
// Check that the payload is signed by a multisig federation member.
PubKey pubKey;
try
{
pubKey = PubKey.RecoverFromMessage(payload.RequestId + payload.FeeAmount, payload.Signature);
if (!this.federationManager.IsMultisigMember(pubKey))
{
this.logger.LogWarning("Received unverified fee vote payload for '{0}' from pubkey '{1}'.", payload.RequestId, pubKey?.ToHex());
return;
}
}
catch (Exception)
{
this.logger.LogWarning("Received malformed fee vote payload for '{0}'.", payload.RequestId);
return;
}
// Reply back to the peer with this node's amount.
FeeAgreePayload replyToPayload = await this.conversionRequestFeeService.MultiSigMemberAgreedOnInteropFeeAsync(payload.RequestId, payload.FeeAmount, pubKey).ConfigureAwait(false);
if (payload.IsRequesting && replyToPayload != null)
{
await this.AttachedPeer.SendMessageAsync(replyToPayload).ConfigureAwait(false);
}
}
/// <summary>
/// Submits this node's fee vote. This methods must be called from within <see cref="asyncLockObject"/>.
/// </summary>
/// <param name="interopConversionRequestFee">The request we are currently processing.</param>
/// <returns>The awaited task.</returns>
private async Task AgreeOnInteropFeeForConversionRequestLockedAsync(InteropConversionRequestFee interopConversionRequestFee)
{
if (!HasFeeProposalBeenConcluded(interopConversionRequestFee))
{
this.logger.LogError($"Cannot vote on fee proposal for request id '{interopConversionRequestFee.RequestId}' as it hasn't concluded yet.");
return;
}
// Check if this node has already vote on this fee.
if (!interopConversionRequestFee.FeeVotes.Any(p => p.PubKey == this.federationManager.CurrentFederationKey.PubKey.ToHex()))
{
ulong candidateFee = (ulong)interopConversionRequestFee.FeeProposals.Select(s => Convert.ToInt64(s.FeeAmount)).Average();
var interOpFeeToMultisig = new InterOpFeeToMultisig()
{
BlockHeight = interopConversionRequestFee.BlockHeight, PubKey = this.federationManager.CurrentFederationKey.PubKey.ToHex(), FeeAmount = candidateFee
};
interopConversionRequestFee.FeeVotes.Add(interOpFeeToMultisig);
this.interopRequestKeyValueStore.SaveValueJson(interopConversionRequestFee.RequestId, interopConversionRequestFee, true);
this.logger.LogDebug($"Creating fee vote for conversion request id '{interopConversionRequestFee.RequestId}' with a fee amount of {new Money(candidateFee)}.");
}
this.logger.LogDebug($"{interopConversionRequestFee.FeeVotes.Count} node(s) has voted on a fee for conversion request id '{interopConversionRequestFee.RequestId}'.");
if (HasFeeVoteBeenConcluded(interopConversionRequestFee))
{
ConcludeInteropConversionRequestFee(interopConversionRequestFee);
}
// Broadcast this peer's vote to the federation
InterOpFeeToMultisig myVote = interopConversionRequestFee.FeeVotes.First(p => p.PubKey == this.federationManager.CurrentFederationKey.PubKey.ToHex());
string signature = this.federationManager.CurrentFederationKey.SignMessage(interopConversionRequestFee.RequestId + myVote.FeeAmount);
await this.federatedPegBroadcaster.BroadcastAsync(FeeAgreePayload.Request(interopConversionRequestFee.RequestId, myVote.FeeAmount, interopConversionRequestFee.BlockHeight, signature)).ConfigureAwait(false);
}