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Add option to generate outbound scid alias using intercept namespace - #3839

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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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Add option to generate outbound scid alias using intercept namespace by aylagreystone · Pull Request #3839 · lightningdevkit/rust-lightning · GitHub
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Add option to generate outbound scid alias using intercept namespace - #3839

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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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👋 Thanks for assigning @tnull as a reviewer!
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Once they submit their review, I'll check if a second reviewer would be helpful.

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Add option to generate outbound scid alias using intercept namespace by aylagreystone · Pull Request #3839 · lightningdevkit/rust-lightning · GitHub
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Add option to generate outbound scid alias using intercept namespace - #3839

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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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👋 Thanks for assigning @tnull as a reviewer!
I'll wait for their review and will help manage the review process.
Once they submit their review, I'll check if a second reviewer would be helpful.

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

@aylagreystone
aylagreystoneforce-pushed the intercept-alias branch 3 times, most recently from c2cf0b5 to 5b1d52fCompareJune 9, 2025 21:45
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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Add option to generate outbound scid alias using intercept namespace by aylagreystone · Pull Request #3839 · lightningdevkit/rust-lightning · GitHub
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Add option to generate outbound scid alias using intercept namespace - #3839

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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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👋 Thanks for assigning @tnull as a reviewer!
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Once they submit their review, I'll check if a second reviewer would be helpful.

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

☔ View full report in Codecov by Sentry.
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@aylagreystone
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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' Add option to generate outbound scid alias using intercept namespace by aylagreystone · Pull Request #3839 · lightningdevkit/rust-lightning · GitHub
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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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👋 Thanks for assigning @tnull as a reviewer!
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Once they submit their review, I'll check if a second reviewer would be helpful.

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

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aylagreystoneforce-pushed the intercept-alias branch 3 times, most recently from c2cf0b5 to 5b1d52fCompareJune 9, 2025 21:45
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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Add option to generate outbound scid alias using intercept namespace by aylagreystone · Pull Request #3839 · lightningdevkit/rust-lightning · GitHub
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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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👋 Thanks for assigning @tnull as a reviewer!
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Once they submit their review, I'll check if a second reviewer would be helpful.

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

@aylagreystone
aylagreystoneforce-pushed the intercept-alias branch 3 times, most recently from c2cf0b5 to 5b1d52fCompareJune 9, 2025 21:45
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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); })(); Add option to generate outbound scid alias using intercept namespace by aylagreystone · Pull Request #3839 · lightningdevkit/rust-lightning · GitHub
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Add option to generate outbound scid alias using intercept namespace - #3839

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aylagreystone wants to merge 1 commit into
lightningdevkit:mainfrom
aylagreystone:intercept-alias
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Add option to generate outbound scid alias using intercept namespace#3839
aylagreystone wants to merge 1 commit into
lightningdevkit:mainfrom
aylagreystone:intercept-alias

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@aylagreystone

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Introduces a flag on ChannelHandshakeConfig that can be set to enable outbound scid alias generation to use the intercept namespace. This would allow users to selectively enable interception on channels and get HtlcIntercepted events for every payment forwarded on those channels.

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ldk-reviews-bot commented Jun 9, 2025

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👋 Thanks for assigning @tnull as a reviewer!
I'll wait for their review and will help manage the review process.
Once they submit their review, I'll check if a second reviewer would be helpful.

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codecovBot commented Jun 9, 2025

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Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (0848e7a) to head (363cf07).
Report is 57 commits behind head on main.

Files with missing linesPatch %Lines
lightning/src/util/config.rs25.00%1 Missing and 2 partials ⚠️
lightning/src/ln/channelmanager.rs94.44%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #3839 +/- ##
==========================================
- Coverage 89.88% 89.84% -0.04% 
==========================================
Files 160 160 Lines 129654 129670 +16 Branches 129654 129670 +16 ==========================================
- Hits 116534 116507 -27 - Misses 10425 10458 +33 - Partials 2695 2705 +10 

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@aylagreystone
aylagreystoneforce-pushed the intercept-alias branch 3 times, most recently from c2cf0b5 to 5b1d52fCompareJune 9, 2025 21:45
@tnull
tnull requested review from tnull and removed request for valentinewallaceJune 10, 2025 07:59

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As mentioned on Discord, I don't think we should extend the intercept SCID concept much further. If we want to do generalized HTLC interception (#2855), we should finally do it 'properly', i.e., create an interface (e.g., a trait) that would allow users to intercept all HLTCs and then return an action to be taken. This could for example be similar to what CLN does with its hooks.

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Going ahead and closing this as it has been superseded by the draft at #3843.

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@aylagreystone@ldk-reviews-bot@tnull