diff --git a/.gitignore b/.gitignore
index c6bba59..815d92b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -128,3 +128,6 @@ dist
 .yarn/build-state.yml
 .yarn/install-state.gz
 .pnp.*
+
+# scratch
+scratch.js
\ No newline at end of file
diff --git a/README.md b/README.md
index b29e96e..9f0f9cc 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,116 @@
-# slp-sdp
\ No newline at end of file
+# slp-sdp
+
+Encode and encrypt SDP data according to the Simple Ledger Session Description Protocol (SLSDP)
+
+## Installation
+
+###  npm
+```shell
+npm install slp-sdp
+```
+
+###  yarn
+```shell
+yarn install slp-sdp
+```
+
+### git
+
+```shell
+git clone https://github.com/badger-cash/slp-sdp.git
+```
+  
+## Usage
+
+```js
+import * as slpsdp from "./index.js";
+
+const sdp = 'v=0\r\n' +
+'o=rtc 1074756789 0 IN IP4 127.0.0.1\r\n' +
+'s=-\r\n' +
+'t=0 0\r\n' +
+'a=group:BUNDLE 0\r\n' +
+'a=msid-semantic:WMS *\r\n' +
+'a=setup:active\r\n' +
+'a=ice-ufrag:7hJ1\r\n' +
+'a=ice-pwd:SYJg4xHfZHfWHHjCMmXIZQ\r\n' +
+'a=ice-options:ice2,trickle\r\n' +
+'a=fingerprint:sha-256 09:5B:9D:35:59:A7:1E:87:24:FF:6B:68:D3:87:E0:B6:C4:B8:4E:CD:0F:5F:76:D3:AA:8E:38:CC:A6:92:DD:D6\r\n' +
+'m=application 59405 UDP/DTLS/SCTP webrtc-datachannel\r\n' +
+'c=IN IP4 192.168.1.119\r\n' +
+'a=mid:0\r\n' +
+'a=sendrecv\r\n' +
+'a=sctp-port:5000\r\n' +
+'a=max-message-size:262144\r\n' +
+'a=candidate:1 1 UDP 2122317823 192.168.1.119 59405 typ host\r\n' +
+'a=candidate:2 1 UDP 1686109951 176.99.247.125 59405 typ srflx raddr 0.0.0.0 rport 0\r\n' +
+'a=end-of-candidates\r\n'
+
+const privateKey = Buffer.from('0551c74103024b39b51f461a55d355d558b147cbfffcc7ae24c3f88ca25d826a', 'hex')
+const publicKey = Buffer.from('0399539c7356d73a9d2e4e37f8f72539e60489f6a4753ffad3f6bf357e01ca47f9', 'hex')
+
+const encryptedSdp = slpsdp.encryptSdp(sdp, publicKey)
+const encryptedHex = encryptedSdp.toString('hex')
+const decryptedSdp = slpsdp.decryptSdp(encryptedSdp, privateKey)
+```
+
+### Produces
+
+```js
+{
+  sdp: 'v=0\r\n' +
+    'o=rtc 1074756789 0 IN IP4 127.0.0.1\r\n' +
+    's=-\r\n' +
+    't=0 0\r\n' +
+    'a=group:BUNDLE 0\r\n' +
+    'a=msid-semantic:WMS *\r\n' +
+    'a=setup:active\r\n' +
+    'a=ice-ufrag:7hJ1\r\n' +
+    'a=ice-pwd:SYJg4xHfZHfWHHjCMmXIZQ\r\n' +
+    'a=ice-options:ice2,trickle\r\n' +
+    'a=fingerprint:sha-256 09:5B:9D:35:59:A7:1E:87:24:FF:6B:68:D3:87:E0:B6:C4:B8:4E:CD:0F:5F:76:D3:AA:8E:38:CC:A6:92:DD:D6\r\n' +
+    'm=application 59405 UDP/DTLS/SCTP webrtc-datachannel\r\n' +
+    'c=IN IP4 192.168.1.119\r\n' +
+    'a=mid:0\r\n' +
+    'a=sendrecv\r\n' +
+    'a=sctp-port:5000\r\n' +
+    'a=max-message-size:262144\r\n' +
+    'a=candidate:1 1 UDP 2122317823 192.168.1.119 59405 typ host\r\n' +
+    'a=candidate:2 1 UDP 1686109951 176.99.247.125 59405 typ srflx raddr 0.0.0.0 rport 0\r\n' +
+    'a=end-of-candidates\r\n',
+  encrypted: '043345aa19d896182fb39b8722f751b560241f9cf295306b7100578147a2263664abf7eb6d1f3cc2f70f5cd62d54c50df1d97460af6fd11c0739a400792f4c6ae2c70926b5cd8bd1f160a9216488c6df8b699f9538de62bf352797078cd256722c9d29837f38c440dd00f4cb890f9e4e99d24ec23fedd9604e124d86f0322a03b40b1872c3fda9d94d599d123d12a514dd7939bff3b3f598e2a717f0653f40e3751ce503887da01b12d65eb09edb2a63b87fe94f4243d9f324365bfe14dda4db3fb24b20c62a9e39a786fd2642503b9595',
+  encryptedLength: 209,
+  decrypted: 'a=setup:active\r\n' +
+    'a=ice-ufrag:7hJ1\r\n' +
+    'a=ice-pwd:SYJg4xHfZHfWHHjCMmXIZQ\r\n' +
+    'a=fingerprint:sha-256 09:5B:9D:35:59:A7:1E:87:24:FF:6B:68:D3:87:E0:B6:C4:B8:4E:CD:0F:5F:76:D3:AA:8E:38:CC:A6:92:DD:D6\r\n' +
+    'm=application 59405 UDP/DTLS/SCTP webrtc-datachannel\r\n' +
+    'a=candidate:1 1 UDP 1686109951 176.99.247.125 59405 typ srflx raddr 0.0.0.0 rport 0\r\n'
+}
+```
+
+
+### License
+
+This software is licensed under the MIT License.
+
+Copyright Fedor Badger, 2024.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to permit
+persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..2b2ed7e
--- /dev/null
+++ b/index.js
@@ -0,0 +1,279 @@
+import * as eccryptoJS from '@vinarmani/eccrypto-js'
+
+const ipToBuffer = (ipString) => {
+    const ipSplit = ipString.split('.')
+    const ipBufArray = ipSplit.map(num => Buffer.alloc(1, parseInt(num)))
+    return Buffer.concat(ipBufArray)
+}
+
+const bufferToIp = (ipBuf) => {
+    const ipArr = [...ipBuf]
+    return ipArr.join('.')
+}
+
+const encodeCandidate = (candidateString) => {
+    const type = candidateString.includes('srflx') ? 1 : 2
+    const bufArr = [Buffer.alloc(1, type)]
+    const candidateSplit = candidateString.split(' ')
+    const priorityBuf = Buffer.alloc(5)
+    priorityBuf.writeUIntLE(candidateSplit[3], 0, 5)
+    const addrBuf = ipToBuffer(candidateSplit[4])
+    const portBuf = Buffer.alloc(2)
+    portBuf.writeUInt16LE(parseInt(candidateSplit[5]))
+    bufArr.push(priorityBuf, addrBuf, portBuf)
+    if (type === 1) {
+        const raddrBuf = ipToBuffer(candidateSplit[9])
+        const rportBuf = Buffer.alloc(2)
+        rportBuf.writeUInt16LE(parseInt(candidateSplit[11]))
+        bufArr.push(raddrBuf, rportBuf)
+    }
+
+    return Buffer.concat(bufArr)
+}
+
+const decodeCandidate = (encodedCandidate) => {
+    let candidateString = '1 1 UDP '
+    let offset = 0
+    const type = encodedCandidate.readUint8(offset) === 1 ? 'srflx' : 'host'
+    offset += 1
+    const priority = encodedCandidate.readUintLE(offset, 5)
+    offset += 5
+    const addr = bufferToIp(encodedCandidate.subarray(offset, offset + 4))
+    offset += 4
+    const port = encodedCandidate.readUint16LE(offset)
+    candidateString += `${priority} ${addr} ${port} typ ${type}`
+    if (type === 'srflx') {
+        offset += 2
+        const raddr = bufferToIp(encodedCandidate.subarray(offset, offset + 4))
+        offset += 4
+        const rport = encodedCandidate.readUint16LE(offset)
+        candidateString += ` raddr ${raddr} rport ${rport}`
+    }
+
+    return candidateString
+}
+
+const encodeSdp = (sdp) => {
+    const encObj = {}
+    const sdpSplit = sdp.split('\r\n')
+    for (let i = 0; i < sdpSplit.length; i++) {
+        const line = sdpSplit[i]
+        const [key, val] = line.split(line.includes('m=application') ? / (.*)/s : /:(.*)/s)
+        encObj[key] = val
+    }
+
+    let setupBuf = Buffer.alloc(1) // active, 1
+    switch (encObj['a=setup']) {
+        case 'active':
+            setupBuf.writeUint8(1)
+            break;
+        case 'passive':
+            setupBuf.writeUint8(2)
+            break;
+        case 'actpass':
+            setupBuf.writeUint8(3)
+            break;
+        default:
+            break
+    }
+
+    const ufragBuf = Buffer.from(encObj['a=ice-ufrag'], 'utf-8')
+    const ufragLenBuf = Buffer.alloc(1)
+    ufragLenBuf.writeUint8(ufragBuf.length)
+    
+    const pwdBuf = Buffer.from(encObj['a=ice-pwd'], 'utf-8')
+    const pwdLenBuf = Buffer.alloc(1)
+    pwdLenBuf.writeUInt8(pwdBuf.length)
+
+    const [, fullFingerprint] = encObj['a=fingerprint'].split(' ')
+    const fingerprint = fullFingerprint.replaceAll(':', '')
+    const fingerprintBuf = Buffer.from(fingerprint, 'hex')
+
+    const [ applicationInt ] = encObj['m=application'].split(' ', 1)
+    const applicationIntBuf = Buffer.alloc(4)
+    applicationIntBuf.writeUint32LE(applicationInt)
+
+    const candidateBuf = encodeCandidate(encObj['a=candidate'])
+
+    const encArr = [
+        setupBuf,
+        ufragLenBuf,
+        ufragBuf,
+        pwdLenBuf,
+        pwdBuf,
+        fingerprintBuf,
+        applicationIntBuf,
+        candidateBuf
+    ]
+
+    const encodedSdp = Buffer.concat(encArr)
+    return encodedSdp
+}
+
+const decimalToHex = (d, padding) => {
+    var hex = Number(d).toString(16);
+    padding = typeof (padding) === "undefined" || padding === null ? padding = 2 : padding;
+
+    while (hex.length < padding) {
+        hex = "0" + hex;
+    }
+
+    return hex;
+}
+
+const decodeSdp = (encodedSdp) => {
+    let offset = 0
+    let sdp = 'a=setup:'
+    switch (encodedSdp.readUint8(offset)) {
+        case 1:
+            sdp += 'active'
+            break;
+        case 2:
+            sdp += 'passive'
+            break;
+        case 3:
+            sdp += 'actpass'
+            break;
+        default:
+            break
+    }
+    
+    sdp += '\r\na=ice-ufrag:'
+    offset += 1
+    const ufragLen = encodedSdp.readUint8(offset)
+    offset += 1
+    sdp += encodedSdp.subarray(offset, offset + ufragLen).toString('utf-8')
+    offset += ufragLen
+
+    sdp += '\r\na=ice-pwd:'
+    const pwdLen = encodedSdp.readUint8(offset)
+    offset += 1
+    sdp += encodedSdp.subarray(offset, offset + pwdLen).toString('utf-8')
+    offset += pwdLen
+
+    sdp += '\r\na=fingerprint:sha-256 '
+    const fingerprintBuf = encodedSdp.subarray(offset, offset + 32)
+    const fingerprintArr = [...fingerprintBuf].map(num => decimalToHex(num).toUpperCase())
+    sdp += fingerprintArr.join(':')
+    offset += 32
+
+    sdp += '\r\nm=application '
+    const applicationInt = encodedSdp.readUint32LE(offset)
+    sdp += applicationInt + ' UDP/DTLS/SCTP webrtc-datachannel'
+    offset += 4
+
+    sdp += '\r\na=candidate:'
+    const encodedCandidate = encodedSdp.subarray(offset)
+    sdp += decodeCandidate(encodedCandidate) + '\r\n'
+
+    return sdp
+
+}
+
+const invalidIpStrings = [
+    '127.0.0.1',
+    '192.168',
+    '169.254',
+    '::'
+]
+
+const extraSdp = [
+    'o=',
+    'c=',
+    's=',
+    'v=',
+    't=',
+    'a=group',
+    'a=msid',
+    'a=ice-options',
+    'a=mid',
+    'a=sendrecv',
+    'a=sctp-port',
+    'a=max-message-size'
+]
+
+const isRemoteIpCandidate = (candidateLine) => {
+    const lineSplit = candidateLine.split(' ')
+    if (lineSplit[2].toUpperCase() !== 'UDP')
+        return false
+    // if (invalidIpStrings.some(sub => lineSplit[4].includes(sub)))
+    //     return false
+    if (lineSplit[7].toUpperCase() !== 'SRFLX')
+        return false
+    return true
+}
+
+// Only use remote candidate
+const filterSdp = (sdp) => {
+    const sdpSplit = sdp.split('\r\n')
+    const filteredSplitSdp = []
+    for (let i = 0; i < sdpSplit.length; i++) {
+        const line = sdpSplit[i]
+        if (extraSdp.some(prop => line.includes(prop)))
+            continue
+        // Only include remote candidates
+        if (line.includes('a=candidate') && !isRemoteIpCandidate(line))
+            continue
+
+        filteredSplitSdp.push(line)
+        // leave after the first remote candidate
+        if (line.includes('a=candidate') && isRemoteIpCandidate(line))
+            break
+    }
+    const filteredSdp = filteredSplitSdp.join('\r\n')
+    return filteredSdp
+}
+
+const convertToEncryptStruct = (encbuf) => {
+    let offset = 0;
+    let tagLength = 32;
+    let pub;
+    switch(encbuf[0]) {
+      case 4:
+        pub = encbuf.slice(0, 65);
+        break;
+      case 3:
+      case 2:
+        pub = encbuf.slice(0, 33);
+        break;
+      default:
+        throw new Error('Invalid type: ' + encbuf[0]);
+    }
+      offset += pub.length;
+  
+    let c = encbuf.slice(offset, encbuf.length - tagLength);
+    let ivbuf = c.slice(0, 128 / 8);
+    let ctbuf = c.slice(128 / 8);
+  
+    let d = encbuf.slice(encbuf.length - tagLength, encbuf.length);
+
+    return {
+        iv: ivbuf,
+        ephemPublicKey: pub,
+        ciphertext: ctbuf,
+        mac: d
+    }
+}
+
+const encryptSdp = (sdp, publicKey) => {
+    const filteredSdp = filterSdp(sdp)
+    const encodedSdp = encodeSdp(filteredSdp)
+    const structuredEj = eccryptoJS.encryptSync(publicKey, encodedSdp)
+    return Buffer.concat([structuredEj.ephemPublicKey, structuredEj.iv, structuredEj.ciphertext, structuredEj.mac])
+}
+
+const decryptSdp = (encryptedSdpBuf, privateKey) => {
+    const encodedSdp = eccryptoJS.decryptSync(privateKey, convertToEncryptStruct(encryptedSdpBuf))
+    return decodeSdp(encodedSdp)
+}
+
+export {
+    filterSdp,
+    isRemoteIpCandidate,
+    encodeSdp,
+    decodeSdp,
+    encodeCandidate,
+    decodeCandidate,
+    encryptSdp,
+    decryptSdp
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..197d99b
--- /dev/null
+++ b/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "slp-sdp",
+  "version": "1.0.0",
+  "description": "Encode and encrypt SDP data according to the Simple Ledger Session Description Protocol (SLSDP)",
+  "main": "index.js",
+  "repository": "https://github.com/badger-cash/slp-sdp.git",
+  "author": "Vin Armani <vin@vinarmani.com>",
+  "license": "MIT",
+  "type": "module",
+  "dependencies": {
+    "@vinarmani/eccrypto-js": "^5.4.1"
+  }
+}
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..5cfe33a
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,288 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@vinarmani/eccrypto-js@^5.4.1":
+  version "5.4.1"
+  resolved "https://registry.yarnpkg.com/@vinarmani/eccrypto-js/-/eccrypto-js-5.4.1.tgz#aabfb4efcc7aa0861dafb428be57e7e46fc914e8"
+  integrity sha512-HO5nDcneLAhKxSQOZzz1D0EwDGwoFxHpOLEy7hTxOO2QZeCv03AsoAnTpGVZ6KzlnuWSOJLOffz2UwcOMLQKkQ==
+  dependencies:
+    aes-js "3.1.2"
+    enc-utils "2.1.0"
+    hash.js "1.1.7"
+    js-sha3 "0.8.0"
+    pbkdf2 "^3.0.17"
+    randombytes "2.1.0"
+    secp256k1 "3.8.0"
+
+aes-js@3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/aes-js/-/aes-js-3.1.2.tgz#db9aabde85d5caabbfc0d4f2a4446960f627146a"
+  integrity sha512-e5pEa2kBnBOgR4Y/p20pskXI74UEz7de8ZGVo58asOtvSVG5YAbJeELPZxOmt+Bnz3rX753YKhfIn4X4l1PPRQ==
+
+bindings@^1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/bindings/-/bindings-1.5.0.tgz#10353c9e945334bc0511a6d90b38fbc7c9c504df"
+  integrity sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==
+  dependencies:
+    file-uri-to-path "1.0.0"
+
+bip66@^1.1.5:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/bip66/-/bip66-1.1.5.tgz#01fa8748785ca70955d5011217d1b3139969ca22"
+  integrity sha512-nemMHz95EmS38a26XbbdxIYj5csHd3RMP3H5bwQknX0WYHF01qhpufP42mLOwVICuH2JmhIhXiWs89MfUGL7Xw==
+  dependencies:
+    safe-buffer "^5.0.1"
+
+bn.js@4.11.8:
+  version "4.11.8"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"
+  integrity sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==
+
+bn.js@^4.11.8, bn.js@^4.11.9:
+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
+
+brorand@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
+  integrity sha512-cKV8tMCEpQs4hK/ik71d6LrPOnpkpGBR0wzxqr68g2m/LB2GxVYQroAjMJZRVM1Y4BCjCKc3vAamxSzOY2RP+w==
+
+browserify-aes@^1.0.6:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/browserify-aes/-/browserify-aes-1.2.0.tgz#326734642f403dabc3003209853bb70ad428ef48"
+  integrity sha512-+7CHXqGuspUn/Sl5aO7Ea0xWGAtETPXNSAjHo48JfLdPWcMng33Xe4znFvQweqc/uzk5zSOI3H52CYnjCfb5hA==
+  dependencies:
+    buffer-xor "^1.0.3"
+    cipher-base "^1.0.0"
+    create-hash "^1.1.0"
+    evp_bytestokey "^1.0.3"
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+buffer-xor@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"
+  integrity sha512-571s0T7nZWK6vB67HI5dyUF7wXiNcfaPPPTl6zYCNApANjIvYJTg7hlud/+cJpdAhS7dVzqMLmfhfHR3rAcOjQ==
+
+cipher-base@^1.0.0, cipher-base@^1.0.1, cipher-base@^1.0.3:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/cipher-base/-/cipher-base-1.0.4.tgz#8760e4ecc272f4c363532f926d874aae2c1397de"
+  integrity sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+create-hash@^1.1.0, create-hash@^1.1.2, create-hash@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/create-hash/-/create-hash-1.2.0.tgz#889078af11a63756bcfb59bd221996be3a9ef196"
+  integrity sha512-z00bCGNHDG8mHAkP7CtT1qVu+bFQUPjYq/4Iv3C3kWjTFV10zIjfSoeqXo9Asws8gwSHDGj/hl2u4OGIjapeCg==
+  dependencies:
+    cipher-base "^1.0.1"
+    inherits "^2.0.1"
+    md5.js "^1.3.4"
+    ripemd160 "^2.0.1"
+    sha.js "^2.4.0"
+
+create-hmac@^1.1.4:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/create-hmac/-/create-hmac-1.1.7.tgz#69170c78b3ab957147b2b8b04572e47ead2243ff"
+  integrity sha512-MJG9liiZ+ogc4TzUwuvbER1JRdgvUFSB5+VR/g5h82fGaIRWMWddtKBHi7/sVhfjQZ6SehlyhvQYrcYkaUIpLg==
+  dependencies:
+    cipher-base "^1.0.3"
+    create-hash "^1.1.0"
+    inherits "^2.0.1"
+    ripemd160 "^2.0.0"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
+drbg.js@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/drbg.js/-/drbg.js-1.0.1.tgz#3e36b6c42b37043823cdbc332d58f31e2445480b"
+  integrity sha512-F4wZ06PvqxYLFEZKkFxTDcns9oFNk34hvmJSEwdzsxVQ8YI5YaxtACgQatkYgv2VI2CFkUd2Y+xosPQnHv809g==
+  dependencies:
+    browserify-aes "^1.0.6"
+    create-hash "^1.1.2"
+    create-hmac "^1.1.4"
+
+elliptic@^6.5.2:
+  version "6.5.5"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.5.tgz#c715e09f78b6923977610d4c2346d6ce22e6dded"
+  integrity sha512-7EjbcmUm17NQFu4Pmgmq2olYMj8nwMnpcddByChSUjArp8F5DQWcIcpriwO4ZToLNAJig0yiyjswfyGNje/ixw==
+  dependencies:
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
+    hash.js "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
+
+enc-utils@2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/enc-utils/-/enc-utils-2.1.0.tgz#f6c28c3d4bb38fb409a93185848cf361f4fde142"
+  integrity sha512-VD0eunGDyzhojePzkORWDnW88gi6tIeGb5Z6QVHugux6mMAPiXyw94fb/7WdDQEWhKMSoYRyzFFUebCqeH20PA==
+  dependencies:
+    bn.js "4.11.8"
+    is-typedarray "1.0.0"
+    typedarray-to-buffer "3.1.5"
+
+evp_bytestokey@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz#7fcbdb198dc71959432efe13842684e0525acb02"
+  integrity sha512-/f2Go4TognH/KvCISP7OUsHn85hT9nUkxxA9BEWxFn+Oj9o8ZNLm/40hdlgSLyuOimsrTKLUMEorQexp/aPQeA==
+  dependencies:
+    md5.js "^1.3.4"
+    safe-buffer "^5.1.1"
+
+file-uri-to-path@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz#553a7b8446ff6f684359c445f1e37a05dacc33dd"
+  integrity sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==
+
+hash-base@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/hash-base/-/hash-base-3.1.0.tgz#55c381d9e06e1d2997a883b4a3fddfe7f0d3af33"
+  integrity sha512-1nmYp/rhMDiE7AYkDw+lLwlAzz0AntGIe51F3RfFfEqyQ3feY2eI/NcwC6umIQVOASPMsWJLJScWKSSvzL9IVA==
+  dependencies:
+    inherits "^2.0.4"
+    readable-stream "^3.6.0"
+    safe-buffer "^5.2.0"
+
+hash.js@1.1.7, hash.js@^1.0.0, hash.js@^1.0.3:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.1.7.tgz#0babca538e8d4ee4a0f8988d68866537a003cf42"
+  integrity sha512-taOaskGt4z4SOANNseOviYDvjEJinIkRgmp7LbKP2YTTmVxWBl87s/uzK9r+44BclBSp2X7K1hqeNfz9JbBeXA==
+  dependencies:
+    inherits "^2.0.3"
+    minimalistic-assert "^1.0.1"
+
+hmac-drbg@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
+  integrity sha512-Tti3gMqLdZfhOQY1Mzf/AanLiqh1WTiJgEj26ZuYQ9fbkLomzGchCws4FyrSd4VkpBfiNhaE1On+lOz894jvXg==
+  dependencies:
+    hash.js "^1.0.3"
+    minimalistic-assert "^1.0.0"
+    minimalistic-crypto-utils "^1.0.1"
+
+inherits@^2.0.1, inherits@^2.0.3, inherits@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
+
+is-typedarray@1.0.0, is-typedarray@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
+  integrity sha512-cyA56iCMHAh5CdzjJIa4aohJyeO1YbwLi3Jc35MmRU6poroFjIGZzUzupGiRPOjgHg9TLu43xbpwXk523fMxKA==
+
+js-sha3@0.8.0:
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/js-sha3/-/js-sha3-0.8.0.tgz#b9b7a5da73afad7dedd0f8c463954cbde6818840"
+  integrity sha512-gF1cRrHhIzNfToc802P800N8PpXS+evLLXfsVpowqmAFR9uwbi89WvXg2QspOmXL8QL86J4T1EpFu+yUkwJY3Q==
+
+md5.js@^1.3.4:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.5.tgz#b5d07b8e3216e3e27cd728d72f70d1e6a342005f"
+  integrity sha512-xitP+WxNPcTTOgnTJcrhM0xvdPepipPSf3I8EIpGKeFLjt3PlJLIDG3u8EX53ZIubkb+5U2+3rELYpEhHhzdkg==
+  dependencies:
+    hash-base "^3.0.0"
+    inherits "^2.0.1"
+    safe-buffer "^5.1.2"
+
+minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
+  integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
+
+minimalistic-crypto-utils@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
+  integrity sha512-JIYlbt6g8i5jKfJ3xz7rF0LXmv2TkDxBLUkiBeZ7bAx4GnnNMr8xFpGnOxn6GhTEHx3SjRrZEoU+j04prX1ktg==
+
+nan@^2.14.0:
+  version "2.19.0"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.19.0.tgz#bb58122ad55a6c5bc973303908d5b16cfdd5a8c0"
+  integrity sha512-nO1xXxfh/RWNxfd/XPfbIfFk5vgLsAxUR9y5O0cHMJu/AW9U95JLXqthYHjEp+8gQ5p96K9jUp8nbVOxCdRbtw==
+
+pbkdf2@^3.0.17:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/pbkdf2/-/pbkdf2-3.1.2.tgz#dd822aa0887580e52f1a039dc3eda108efae3075"
+  integrity sha512-iuh7L6jA7JEGu2WxDwtQP1ddOpaJNC4KlDEFfdQajSGgGPNi4OyDc2R7QnbY2bR9QjBVGwgvTdNJZoE7RaxUMA==
+  dependencies:
+    create-hash "^1.1.2"
+    create-hmac "^1.1.4"
+    ripemd160 "^2.0.1"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
+randombytes@2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/randombytes/-/randombytes-2.1.0.tgz#df6f84372f0270dc65cdf6291349ab7a473d4f2a"
+  integrity sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==
+  dependencies:
+    safe-buffer "^5.1.0"
+
+readable-stream@^3.6.0:
+  version "3.6.2"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.2.tgz#56a9b36ea965c00c5a93ef31eb111a0f11056967"
+  integrity sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==
+  dependencies:
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
+
+ripemd160@^2.0.0, ripemd160@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/ripemd160/-/ripemd160-2.0.2.tgz#a1c1a6f624751577ba5d07914cbc92850585890c"
+  integrity sha512-ii4iagi25WusVoiC4B4lq7pbXfAp3D9v5CwfkY33vffw2+pkDjY1D8GaN7spsxvCSx8dkPqOZCEZyfxcmJG2IA==
+  dependencies:
+    hash-base "^3.0.0"
+    inherits "^2.0.1"
+
+safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2, safe-buffer@^5.2.0, safe-buffer@~5.2.0:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
+
+secp256k1@3.8.0:
+  version "3.8.0"
+  resolved "https://registry.yarnpkg.com/secp256k1/-/secp256k1-3.8.0.tgz#28f59f4b01dbee9575f56a47034b7d2e3b3b352d"
+  integrity sha512-k5ke5avRZbtl9Tqx/SA7CbY3NF6Ro+Sj9cZxezFzuBlLDmyqPiL8hJJ+EmzD8Ig4LUDByHJ3/iPOVoRixs/hmw==
+  dependencies:
+    bindings "^1.5.0"
+    bip66 "^1.1.5"
+    bn.js "^4.11.8"
+    create-hash "^1.2.0"
+    drbg.js "^1.0.1"
+    elliptic "^6.5.2"
+    nan "^2.14.0"
+    safe-buffer "^5.1.2"
+
+sha.js@^2.4.0, sha.js@^2.4.8:
+  version "2.4.11"
+  resolved "https://registry.yarnpkg.com/sha.js/-/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
+  integrity sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+string_decoder@^1.1.1:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.3.0.tgz#42f114594a46cf1a8e30b0a84f56c78c3edac21e"
+  integrity sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==
+  dependencies:
+    safe-buffer "~5.2.0"
+
+typedarray-to-buffer@3.1.5:
+  version "3.1.5"
+  resolved "https://registry.yarnpkg.com/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz#a97ee7a9ff42691b9f783ff1bc5112fe3fca9080"
+  integrity sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==
+  dependencies:
+    is-typedarray "^1.0.0"
+
+util-deprecate@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
+  integrity sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==