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handle batched channel opens. infer funding balances in both directions.

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This commit is contained in:
Mononaut
2022-11-21 09:14:06 +09:00
committed by softsimon
parent 35ae672177
commit dc7d5bc94d
2 changed files with 45 additions and 32 deletions
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47
backend/src/tasks/lightning/network-sync.service.ts
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@@ -372,9 +372,12 @@ class NetworkSyncService {
// this input directly spends a channel close output
await this.$attributeChannelBalances(closeChannel, openChannel, input);
} else {
const prevOpenChannel = await channelsApi.$getChannelForensicsByOpeningId(input.txid);
if (prevOpenChannel) {
await this.$attributeChannelBalances(prevOpenChannel, openChannel, input, null, null, true);
const prevOpenChannels = await channelsApi.$getChannelForensicsByOpeningId(input.txid);
if (prevOpenChannels?.length) {
// this input spends a channel open change output
for (const prevOpenChannel of prevOpenChannels) {
await this.$attributeChannelBalances(prevOpenChannel, openChannel, input, null, null, true);
}
} else {
// check if this input spends any swept channel close outputs
await this.$attributeSweptChannelCloses(openChannel, input);
@@ -435,33 +438,33 @@ class NetworkSyncService {
): Promise<void> {
// figure out which node controls the input/output
let openSide;
let closeLocal;
let closeRemote;
let prevLocal;
let prevRemote;
let matched = false;
let ambiguous = false; // if counterparties are the same in both channels, we can't tell them apart
if (openChannel.node1_public_key === prevChannel.node1_public_key) {
openSide = 1;
closeLocal = 1;
closeRemote = 2;
prevLocal = 1;
prevRemote = 2;
matched = true;
} else if (openChannel.node1_public_key === prevChannel.node2_public_key) {
openSide = 1;
closeLocal = 2;
closeRemote = 1;
prevLocal = 2;
prevRemote = 1;
matched = true;
}
if (openChannel.node2_public_key === prevChannel.node1_public_key) {
openSide = 2;
closeLocal = 1;
closeRemote = 2;
prevLocal = 1;
prevRemote = 2;
if (matched) {
ambiguous = true;
}
matched = true;
} else if (openChannel.node2_public_key === prevChannel.node2_public_key) {
openSide = 2;
closeLocal = 2;
closeRemote = 1;
prevLocal = 2;
prevRemote = 1;
if (matched) {
ambiguous = true;
}
@@ -508,7 +511,7 @@ class NetworkSyncService {
}
// attribute outputs to each counterparty, and sum up total known balances
prevChannel.outputs[input.vout].node = closeLocal;
prevChannel.outputs[input.vout].node = prevLocal;
const isPenalty = prevChannel.outputs.filter((out) => out.type === 2 || out.type === 4)?.length > 0;
const normalOutput = [1,3].includes(prevChannel.outputs[input.vout].type);
let localClosingBalance = 0;
@@ -519,7 +522,7 @@ class NetworkSyncService {
localClosingBalance += output.value;
} else if (output.node) {
// this output determinstically linked to one of the counterparties
if (output.node === closeLocal) {
if (output.node === prevLocal) {
localClosingBalance += output.value;
} else {
remoteClosingBalance += output.value;
@@ -529,17 +532,25 @@ class NetworkSyncService {
remoteClosingBalance += output.value;
}
}
prevChannel[`node${closeLocal}_closing_balance`] = localClosingBalance;
prevChannel[`node${closeRemote}_closing_balance`] = remoteClosingBalance;
prevChannel[`node${prevLocal}_closing_balance`] = localClosingBalance;
prevChannel[`node${prevRemote}_closing_balance`] = remoteClosingBalance;
prevChannel.closing_fee = prevChannelTx.fee;
if (initiator && !linkedOpenings) {
const initiatorSide = initiator === 'remote' ? closeRemote : closeLocal;
const initiatorSide = initiator === 'remote' ? prevRemote : prevLocal;
prevChannel.closed_by = prevChannel[`node${initiatorSide}_public_key`];
}
// save changes to the closing channel
await channelsApi.$updateClosingInfo(prevChannel);
} else {
if (prevChannelTx.vin.length <= 1) {
prevChannel[`node${prevLocal}_funding_balance`] = prevChannel.capacity;
prevChannel.single_funded = true;
prevChannel.funding_ratio = 1;
// save changes to the closing channel
await channelsApi.$updateOpeningInfo(prevChannel);
}
}
openChannel[`node${openSide}_funding_balance`] = openChannel[`node${openSide}_funding_balance`] + (openContribution || prevChannelTx?.vout[input.vout]?.value || 0);
}