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Cashu NUTs (Notation, Usage, and Terminology)

These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.

Specifications

Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.

Mandatory

NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info

Optional

#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-

Wallets:

Mints:

About

Cashu protocol specifications https://cashubtc.github.io/nuts/

Resources

Readme
License

Security policy

Security policy
Activity
Custom properties

Stars

0 stars

Watchers

0 watching

Forks

0 forks
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Contributors

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

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

Skip to content
BranchesTags
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Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

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

Skip to content
BranchesTags
Repository files navigation
Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
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Security policy
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Cashu NUTs (Notation, Usage, and Terminology)
These documents each specify parts of the Cashu protocol. Read the specifications for the legacy API here.
Specifications
Wallets and mints MUST implement all mandatory specs and CAN implement optional specs.
Mandatory
NUT #Description
00Cryptography and Models
01Mint public keys
02Keysets and fees
03Swapping tokens
04Minting tokens
05Melting tokens
06Mint info
Optional
#DescriptionWalletsMints
07Token state checkNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
08Overpaid Lightning feesNutshell, Nutstash, cashu-ts, cdk, Minibits, macadamiaNutshell, cdk-mintd, nutmix
09Signature restoreNutshell, cdk, Cashu.me, Minibits, macadamiaNutshell, cdk-mintd
10Spending conditionsNutshell, cdk, cashu-ts, MinibitsNutshell, cdk-mintd, nutmix
11Pay-To-Pubkey (P2PK)Nutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
12DLEQ proofsNutshell, cdk, cashu-tsNutshell, cdk-mintd, nutmix
13Deterministic secretsNutshell, cashu-ts, cdk, macadamia, Minibits-
14Hashed Timelock Contracts (HTLCs)Nutshell, cdkNutshell, cdk-mintd, nutmix
15Partial multi-path payments (MPP)Nutshell, cdkNutshell, cdk-mintd, nutmix
16Animated QR codesCashu.me, macadamia, Minibits-
17WebSocket subscriptionsNutshell, cdk, Cashu.me, MinibitsNutshell, cdk-mintd, nutmix
18Payment requestsCashu.me, Boardwalk, cdk, Minibits-
19Cached Responses-Nutshell, cdk-mintd
20Signature on Mint Quotecdk, Nutshellcdk-mintd, Nutshell
21Clear authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
22Blind authenticationNutshell, cdkNutshell, cdk-mintd, nutmix
23Payment Method: BOLT11Nutshell, cdkNutshell, cdk-mintd, nutmix
24HTTP 402 Payment Required--
25Payment Method: BOLT12cdk, cashu-tscdk-mintd
26Payment Request Bech32m Encodingcdk-
27Nostr Mint BackupCashu.me, cdk-
Wallets:
Mints:
About
Cashu protocol specifications https://cashubtc.github.io/nuts/
Resources
Readme
License
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors