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NPMBuild Status

Elliptic curve cryptography functions (ECC)

Private Key, Public Key, Signature, AES, Encryption / Decryption

Import

importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')

Include

  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>

Common API

Table of Contents

wif

Wallet Import Format

Type: string

ecc

initialize

Initialize by running some self-checking code. This should take a second to gather additional CPU entropy used during private key generation.

Initialization happens once even if called multiple times.

Returns Promise

unsafeRandomKey

Does not pause to gather CPU entropy.

Returns Promise<PrivateKey> test key

randomKey

Parameters

  • cpuEntropyBitsnumber gather additional entropy from a CPU mining algorithm. This will already happen once by default. (optional, default 0)

Examples

ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})

Returns Promise<wif>

seedPrivate

Parameters

  • seedstring any length string. This is private. The same seed produces the same private key every time. At least 128 random bits should be used to produce a good private key.

Examples

ecc.seedPrivate('secret')===wif

Returns wif

privateToPublic

Parameters

  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')

Examples

ecc.privateToPublic(wif)===pubkey

Returns pubkey

isValidPublic

Parameters

  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')

Examples

ecc.isValidPublic(pubkey)===true

Returns boolean valid

isValidPrivate

Parameters

Examples

ecc.isValidPrivate(wif)===true

Returns boolean valid

sign

Create a signature using data or a hash.

Parameters

  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')

Examples

ecc.sign('I am alive',wif)

Returns string string signature

signHash

Parameters

  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')

Returns string string signature

verify

Verify signed data.

Parameters

  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)

Examples

ecc.verify(signature,'I am alive',pubkey)===true

Returns boolean

recover

Recover the public key used to create the signature.

Parameters

  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')

Examples

ecc.recover(signature,'I am alive')===pubkey

Returns pubkey

recoverHash

Parameters

  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')

Returns PublicKey

sha256

Parameters

  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')

Examples

ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'

Returns (string | Buffer) Buffer when encoding is null, or string

pubkey

EOSKey..

Type: string

Usage (Object API)

let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()

Browser

git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})

About

Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption

Resources

Readme
Activity
Custom properties

Stars

0 stars

Watchers

3 watching

Forks

0 forks
Report repository

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Contributors

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, '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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Repository files navigation
NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
3 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

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106 Commits
Folders and files
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package-lock.json
package-lock.json
package.json
package.json
Repository files navigation
NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
3 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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
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106 Commits
Folders and files
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Last commit message
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dist
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src
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README.md
README.md
package-lock.json
package-lock.json
package.json
package.json
Repository files navigation
NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
3 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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" + '

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NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
3 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

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Repository files navigation
NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
3 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

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README.md
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package-lock.json
package.json
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Repository files navigation
NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
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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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NPMBuild Status
Elliptic curve cryptography functions (ECC)
Private Key, Public Key, Signature, AES, Encryption / Decryption
Import
importeccfrom'eosjs-ecc'// orconstecc=require('eosjs-ecc')
Include
  • Install with: npm install eosjs-ecc
  • Html script tag, see releases for the correct version and its matching script integrity hash.
<html><head><metacharset="utf-8"><!-- sha512-cL+IQQaQ586s9DrXfGtDheRpj5iDKh2M+xlpfwbhNjRIp4BGQ1fkM/vB4Ta8mc+f51YBW9sJiPcyMDIreJe6gQ== lib/eosjs-ecc.js sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ== lib/eosjs-ecc.min.js sha512-eq1SCoSe38uR1UVuQMwR73VgY8qKTBDc87n2nIiC5WLhn1o2y1U6c5wY8lrigVX7INM8fM0PxDlMX5WvpghKig== lib/eosjs-ecc.min.js.map --><scriptsrc="https://cdn.jsdelivr.net/npm/eosjs-ecc@4.0.4/lib/eosjs-ecc.min.js"
integrity="sha512-dYFDmK/d9r3/NCp6toLtfkwOjSMRBaEzaGAx1tfRItC0nsI0hVLERk05iNBQR7uDNI7ludYhcBI4vUiFHdjsTQ=="
crossorigin="anonymous"></script></head><body>
See console object: eosjs_ecc
</body></html>
Common API
Table of Contents
wif
Wallet Import Format
Type: string
ecc
initialize
Initialize by running some self-checking code. This should take a
second to gather additional CPU entropy used during private key
generation.
Initialization happens once even if called multiple times.
Returns Promise
unsafeRandomKey
Does not pause to gather CPU entropy.
Returns Promise<PrivateKey> test key
randomKey
Parameters
  • cpuEntropyBitsnumber gather additional entropy
from a CPU mining algorithm. This will already happen once by
default. (optional, default 0)
Examples
ecc.randomKey().then(privateKey=>{console.log('Private Key:\t',privateKey)// wifconsole.log('Public Key:\t',ecc.privateToPublic(privateKey))// EOSkey...})
Returns Promise<wif>
seedPrivate
Parameters
  • seedstring any length string. This is private. The same
seed produces the same private key every time. At least 128 random
bits should be used to produce a good private key.
Examples
ecc.seedPrivate('secret')===wif
Returns wif
privateToPublic
Parameters
  • wifwif
  • pubkey_prefixstring public key prefix (optional, default 'EOS')
Examples
ecc.privateToPublic(wif)===pubkey
Returns pubkey
isValidPublic
Parameters
  • pubkeypubkey like EOSKey..
  • pubkey_prefixstring (optional, default 'EOS')
Examples
ecc.isValidPublic(pubkey)===true
Returns boolean valid
isValidPrivate
Parameters
Examples
ecc.isValidPrivate(wif)===true
Returns boolean valid
sign
Create a signature using data or a hash.
Parameters
  • data(string | Buffer)
  • privateKey(wif | PrivateKey)
  • encodingString data encoding (if string) (optional, default 'utf8')
Examples
ecc.sign('I am alive',wif)
Returns string string signature
signHash
Parameters
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or string
  • privateKey(wif | PrivateKey)
  • encodingString dataSha256 encoding (if string) (optional, default 'hex')
Returns string string signature
verify
Verify signed data.
Parameters
  • signature(string | Buffer) buffer or hex string
  • data(string | Buffer)
  • pubkey(pubkey | PublicKey)
  • encoding (optional, default 'utf8')
  • hashDataboolean sha256 hash data before verify (optional, default true)
Examples
ecc.verify(signature,'I am alive',pubkey)===true
Returns boolean
recover
Recover the public key used to create the signature.
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • data(String | Buffer) full data
  • encodingString data encoding (if data is a string) (optional, default 'utf8')
Examples
ecc.recover(signature,'I am alive')===pubkey
Returns pubkey
recoverHash
Parameters
  • signature(String | Buffer) (EOSbase58sig.., Hex, Buffer)
  • dataSha256(String | Buffer) sha256 hash 32 byte buffer or hex string
  • encodingString dataSha256 encoding (if dataSha256 is a string) (optional, default 'hex')
Returns PublicKey
sha256
Parameters
  • data(string | Buffer) always binary, you may need Buffer.from(data, 'hex')
  • resultEncoding (optional, default 'hex')
  • encodingstring result encoding 'hex', 'binary' or 'base64' (optional, default 'hex')
Examples
ecc.sha256('hashme')==='02208b..'
ecc.sha256(Buffer.from('02208b','hex'))==='29a23..'
Returns (string | Buffer) Buffer when encoding is null, or string
pubkey
EOSKey..
Type: string
Usage (Object API)
let{PrivateKey, PublicKey, Signature, Aes, key_utils, config}=require('eosjs-ecc')// Create a new random private keyletprivateWifPrivateKey.randomKey().then(privateKey=>privateWif=privateKey.toWif())// Convert to a public keypubkey=PrivateKey.fromString(privateWif).toPublic().toString()
Browser
git clone https://github.com/EOSIO/eosjs-ecc.git
cd eosjs-ecc
npm install
npm run build_browser
# builds: ./dist/eosjs-ecc.js# Verify release hash
<scriptsrc=eosjs-ecc.js></script>
varecc=eosjs_eccecc.randomKey().then(privateWif=>{varpubkey=ecc.privateToPublic(privateWif)console.log(pubkey)})
About
Elliptic curve cryptography functions: Private Key, Public Key, Signature, AES, Encryption, Decryption
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
3 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages