Javascript client library of the iden3 system.
npm install --save iden3
https://www.npmjs.com/package/iden3
// import iden3js
const iden3 = require('iden3');
// new key container using localStorage
let kc = new iden3.KeyContainer('localstorage');
// unlock the KeyContainer for the next 30 seconds
let passphrase = 'this is a test passphrase';
kc.unlock(passphrase);
// import key into the key container
let keyId = kc.importKey('x'); // keyId is the address that is used to identify the key
// generate new keys
let keys = kc.generateKeysMnemonic();
/*
keys =
{
keys: [
'0x94f1d9fdf01abec15ba9c473dbb87f9931986a86',
'0xa50970867092c1ae769fc24d5f5151c7b87ff715',
'0x1526824c893cb894d18f0cc400c24d96340a4341'
],
mnemonic: 'blanket kick genre rubber better helmet youth slush acid select brick setup'
}
*/
let keyRecover = keys.keys[0];
let keyRevoke = keys.keys[1];
let keyOp = keys.keys[2];
// also we can import an already existing seed
let seed = 'blanket kick genre rubber better helmet youth slush acid select brick setup';
let keys = kc.generateKeysMnemonic(seed);
// import privkey
let key0id = kc.importKey('privKHex');
// key0id is the address of the imported key, will be used as key identifier
// generate key random
let key1id = kc.generateKeyRand();
// key1id is the address of the generated key, will be used as key identifier
// create a new relay object
const relay = new iden3.Relay('http://127.0.0.1:5000');
// create a new id object
let id = new iden3.Id(keyRecover, keyRevoke, keyOp, relay, '');
// create the counterfactoual contract through the relay, get the identity address as response
id.createID().then(res => {
console.log(res);
console.log(id.idaddr); // res == id.idaddr
});
// bind the identity address to a name. Internally, signs the idaddr+name, and sends it to the relay, that will perform an AssignNameClaim vinculating the identity address with the name.
id.bindID(kc, 'username').then(res => {
console.log(res.data);
});
// generate new key that will be the one authorized by the other key
let ksign = kc.generateKey();
let unixtime = Math.round(+new Date()/1000);
// create new AuthorizeKSignClaim, sign it, and send it to the Relay
id.authorizeKSignClaim(kc, key0id, ksign, 'appToAuthName', 'authz', unixtime, unixtime).then(res => {
let proofOfKSign = res.data.proofOfClaim;
});
// create new genericClaim, sign it and send it to the Relay
id.genericClaim(kc, ksign, 'iden3.io', 'default', 'extraindex', 'data').then(res => {
let proofOfClaim = res.data.proofOfClaim;
});
// having a proof of a leaf, we can check it
let verified = iden3.merkleTree.checkProof(rootHex, mpHex, hiHex, htHex, numLevels);
// verified == true
// having a proofOfClaim, let's check it
let verified = iden3.claim.checkProofOfClaim(proofOfClaim, 140);
// verified == true
// centralized authentication
// once have the QR data scanned, or the hex QR data copied
let qrJson = iden3.auth.parseQRhex(qrHex);
let qrKSign = iden3.utils.addrFromSig(qrJson.challenge, qrJson.signature);
// perform the AuthorizeKSignClaim over the qrKSign
id.authorizeKSignClaim(kc, id.keyOperational, qrKSign, 'appToAuthName', 'authz', unixtimeFrom, unixtimeUntil).then(res => {
let ksignProof = res.data.proofOfClaim;
// send the challenge, signature, KSign, and KSignProof to the qr url, that is the url of the backend of the centralized auth
iden3.auth.resolv(qrJson.url, id.keyOperational, qrJson.challenge, qrJson.signature, qrKSign, ksignProof).then(res => {
console.log('centralized auth success, the website will refresh with the jwt');
})
.catch(function (error) {
console.log(error);
});
})
.catch(function (error) {
console.log(error);
});
const iden3 = require('iden3');
// new key container
let kc = new iden3.KeyContainer('localStorage');
// new key container
let kc = new iden3.KeyContainer('teststorage');
Usage:
// unlock the KeyContainer
let passphrase = 'this is a test passphrase';
kc.unlock(passphrase);
// we can generate a new mnemonic just calling:
let keys = kc.generateKeysMnemonic();
/*
this returns:
keys =
{
keys: [ // addresses of the keys
'0x94f1d9fdf01abec15ba9c473dbb87f9931986a86',
'0xa50970867092c1ae769fc24d5f5151c7b87ff715',
'0x1526824c893cb894d18f0cc400c24d96340a4341'
],
mnemonic: 'blanket kick genre rubber better helmet youth slush acid select brick setup'
}
*/
// also we can import an already existing seed
let seed = 'blanket kick genre rubber better helmet youth slush acid select brick setup';
let keys = kc.generateKeysMnemonic(seed);
/*
And we can specify the diferent identity profiles that we want to derivate from that seed.
We can specify which identity profile we want to derivate, and how many keys we want to generate
*/
// for example, for our first identity0, we want 4 different keys, so will call the method specifying that we want the identity profile 0, and 4 keys:
let keys_id0 = kc.generateKeysMnemonic(seed, 0, 4);
// for the idenity1, we want 2 keys:
let keys_id1 = kc.generateKeysMnemonic(seed, 1, 2);
// and for the identity2 we want 5 keys:
let keys_id2 = kc.generateKeysMnemonic(seed, 2, 5);
// by default, if we don't specify the path profile and the number of keys, the function returns 3 keys for the path profile 0.
// import key
let key0id = kc.importKey('privKHex');
// key0id is the address of the imported key, will be used as key identifier
// generate key
let key1id = kc.generateKeyRandom();
// key1id is the address of the generated key, will be used as key identifier
// sign using key0id
let signature = kc.sign(key0id, 'test');
// get an array with the address identifiers of the keys stored in the KeyContainer
let keysList = kc.listKeys();
// new key container
let kc = new iden3.KeyContainer();
// unlock the KeyContainer for the next 30 seconds
let passphrase = 'this is a test passphrase';
kc.unlock(passphrase);
// generate new keys
let keyRecover = kc.generateKey();
let keyRevoke = kc.generateKey();
let keyOp = kc.generateKey();
// new relay
const relay = new iden3.Relay('http://127.0.0.1:5000');
// create key
let id = new iden3.Id(keyRecover, keyRevoke, keyOp, relay, '');
Creates the counterfactual contract through the Relay, and gets the identity address.
id.createID().then(res => {
console.log(res);
});
Output:
{
idaddr : '0x46b57a3f315f99a6de39406310f5bd0db03326c1'
}
Deploys the counterfactual smart contract of identity to the blockchain.
id.deployID().then(res => {
console.log(res.data);
});
Output:
{
idaddr: '0x8435ebb41634c05019be1710be0007fa0d92861f',
tx: '0x403859ccc701eb358d3a25c908c33de733cbb2d0ebc1c7738eed4908cc8cf5c4'
}
Vinculates a name to the identity.
Internally, signs the idaddr+name, and sends it to the Relay, that will perform an AssignNameClaim vinculating the identity address with the name.
id.bindID(kc, name).then(res => {
console.log(res.data);
});
Output:
{
ethID: '0xbc8c480e68d0895f1e410f4e4ea6e2d6b160ca9f',
name: 'username',
signature: '0xeda8b278eae69cd8c4863380f0af5cfe8360481790d8ea5c188705b552bc0d5e1384efb627db5b423d4a163ad02ca23a2f05eea5dc787ac5837789aa95f50f101b'
}
// perform a new AuthorizeKSignClaim, sign it, and post it to the Relay
let keyToAuth = kc.generateKey();
id.authorizeKSignClaim(kc, key0id, keyToAuth, 'appToAuthName', 'authz', 1535208350, 1535208350).then(res => {
//
});
// perform a new genericClaim, sign it, and post it to the Relay
id.genericClaim(kc, ksign, 'iden3.io', 'default', 'extraindex', 'data').then(res => {
//
});
// new GenericClaim
let claim = new iden3.claim.GenericClaim('iden3.io', 'default', 'extra index data', 'extra data');
/*
claim:
{
baseIndex: {
namespace: < Buffer 3 c fc 3 a 1 e db f6 91 31 6 f ec 9 b 75 97 0 f bf b2 b0 e8 d8 ed fc 6 e c7 62 8 d b7 7 c 49 69 40 30 74 > ,
type: < Buffer cf ee 7 c 08 a9 8 f 4 b 56 5 d 12 4 c 7 e 4 e 28 ac c5 2 e 1 b c7 80 e3 88 7 d b0 > ,
indexLength: 66,
version: 0
},
extraIndex: {
data: < Buffer 63 31 >
},
data: < Buffer >
}
*/
// methods of the GenericClaim
claim.bytes(); // claim in Buffer representation
claim.hi(); // Hash of the index of the claim in Buffer representation
claim.ht(); // Hash of the claim in Buffer representation
// parse GenericClaim from Buffer
let claimParsed = iden3.claim.parseGenericClaimBytes(claim.bytes());
// new AuthorizeKSignClaim
let authorizeKSignClaim = new iden3.claim.AuthorizeKSignClaim('0x101d2fa51f8259df207115af9eaa73f3f4e52e60',
'appToAuthName', 'authz', 1535208350, 1535208350);
/*
authorizeKSignClaim:
{
baseIndex: {
namespace: < Buffer 3 c fc 3 a 1 e db f6 91 31 6 f ec 9 b 75 97 0 f bf b2 b0 e8 d8 ed fc 6 e c7 62 8 d b7 7 c 49 69 40 30 74 > ,
type: < Buffer 35 3 f 86 7 e f7 25 41 1 d e0 5 e 3 d 4 b 0 a 01 c3 7 c f7 ad 24 bc c2 13 14 1 a > ,
indexLength: 84,
version: 0
},
extraIndex: {
keyToAuthorize: '0x101d2fa51f8259df207115af9eaa73f3f4e52e60'
},
application: < Buffer 20 77 bb 3 f 04 00 dd 62 42 1 c 97 22 05 36 fd 6 e d2 be 29 22 8 e 8 d b1 31 5 e 8 c 6 d 75 25 f4 bd f4 > ,
applicationAuthz: < Buffer da d9 96 6 a 2 e 73 71 f0 a2 4 b 19 29 ed 76 5 c 0 e 7 a 3 f 2 b 46 65 a7 6 a 19 d5 81 73 30 8 b b3 40 62 > ,
validFrom: 1535208350,
validUntil: 1535208350
}
*/
// methods of the AuthorizeKSignClaim
authorizeKSignClaim.bytes(); // claim in Buffer representation
authorizeKSignClaim.hi(); // Hash of the index of the claim in Buffer representation
authorizeKSignClaim.ht(); // Hash of the index of the claim in Buffer representation
// parse AuthorizeKSignClaim from Buffer
let authorizeKSignClaimParsed = iden3.claim.parseAuthorizeKSignClaim(authorizeKSignClaim.bytes());
Checks the full proof of a claim. This means check the:
Merkle Proof of the claimMerkle Proof of the non revocation claimMerkle Proof of the claim that the Relay have performed over the identity Merkle Root (this kind of claim is the SetRootClaim)Merkle Proof of the non revocation of the SetRootClaimlet proofOfClaimStr = `
{
"ClaimProof": {
"Leaf": "0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c4969403074353f867ef725411de05e3d4b0a01c37cf7ad24bcc213141a0000005400000000970e8128ab834e8eac17ab8e3812f010678cf7912077bb3f0400dd62421c97220536fd6ed2be29228e8db1315e8c6d7525f4bdf4dad9966a2e7371f0a24b1929ed765c0e7a3f2b4665a76a19d58173308bb34062000000005b816b9e000000005b816b9e",
"Proof": "0x00000000000000000000000000000000000000000000000000000000000000052d3cbe677b6e4048e0db5a3d550e5f1bb2252c099a990137ac644ddfff9553dde5d128f57df872a6ab1c768ab3da7fc08faa153d4ac40c33471d25be32b38132",
"Root": "0xb98333b2c502fc156d0ee7779d77aa9063fcbc6ed41e5c3e8b9900f379523101"
},
"SetRootClaimProof": {
"Leaf": "0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c49694030749b9a76a0132a0814192c05c9321efc30c7286f6187f18fc60000005400000003bc8c480e68d0895f1e410f4e4ea6e2d6b160ca9fb98333b2c502fc156d0ee7779d77aa9063fcbc6ed41e5c3e8b9900f379523101",
"Proof": "0x000000000000000000000000000000000000000000000000000000000000000b7d2ff8e70da77ef7559614425aa33021eb88752f63a690911c031a1fae273f9393b3f57a79800ca02cd1ac3a555d9dbb7d5869251d51d34e01d7de4ab811e9753cb6d37abb4eae8eeea11cbae9a96a021e2d157340721884763fc2ac33313ecd",
"Root": "0x33f1e9b3ed86317369938d5bb04ba23e5f5de65da07c3a9368ffe19121e7a6c6"
},
"ClaimNonRevocationProof": {
"Leaf": "0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c4969403074353f867ef725411de05e3d4b0a01c37cf7ad24bcc213141a0000005400000001970e8128ab834e8eac17ab8e3812f010678cf7912077bb3f0400dd62421c97220536fd6ed2be29228e8db1315e8c6d7525f4bdf4dad9966a2e7371f0a24b1929ed765c0e7a3f2b4665a76a19d58173308bb34062000000005b816b9e000000005b816b9e",
"Proof": "0x0000000000000000000000000000000000000000000000000000000000000003df560419165ec6b3299f04ac93510999379987ff25b0799a738ad0d078c9b9d6f912e7e2fab90f745aab5874a5e4f7657921b271378ea05ee9b0f25d69f87a3c",
"Root": "0xb98333b2c502fc156d0ee7779d77aa9063fcbc6ed41e5c3e8b9900f379523101"
},
"SetRootClaimNonRevocationProof": {
"Leaf": "0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c49694030749b9a76a0132a0814192c05c9321efc30c7286f6187f18fc60000005400000004bc8c480e68d0895f1e410f4e4ea6e2d6b160ca9fb98333b2c502fc156d0ee7779d77aa9063fcbc6ed41e5c3e8b9900f379523101",
"Proof": "0x000000000000000000000000000000000000000000000000000000000000000b615fadf56023c4ef72c3d455f0e6b6f9ace467e751e9b8e350fe0401368faf4801d4499dba57c843cd6c64fb07975d506e27b5e68166493618405a4bbf2b256eaf677f70fad9050c9d8e77b727fe6d29187c054cd47cfb3fcc10b2a4cbf08f8c",
"Root": "0x33f1e9b3ed86317369938d5bb04ba23e5f5de65da07c3a9368ffe19121e7a6c6"
},
"Date": 1539008518,
"Signature": "0x19074094d44fc77bc020d6c51c2e3f71fb45ede33b05202553d785cfce7d702411b98a4d0980d35383dfbe1d5b9779ee3b8f6295c27969bcf45156cdf6382b6201"
}
`;
let proofOfClaim = JSON.parse(proofOfClaimStr);
let verified = iden3.claim.checkProofOfClaim(proofOfClaim, 140);
// verified === true
Checks the Merkle Proof of a Leaf.
let verified = iden3.merkleTree.checkProof(rootHex, mpHex, hiHex, htHex, numLevels);
console.log(verified); // true
This function checks the data structure of proofOfClaim and returns true if all the proofs are correct.
Internally, it usees the iden3.merkleTree.checkProof() function, for each one of the proofs that are contained inside proofOfClaim data object.
let verified = iden3.merkleTree.checkProofOfClaim(proofOfClaim, 140);
console.log(verified); // true
// hash Buffer
let hash = iden3.utils.hashBytes(b);
let hex = iden3.utils.bytesToHex(buff); // returns a Hexadecimal representation of a Buffer
let buff = iden3.utils.hexToBytes(hex); // returns a Buffer from a Heximal representation string
// verify signature
let verified = iden3.utils.verifySignature(msgHashHex, signatureHex, addressHex);
// verified: true
Connectors to interact with the relay API REST.
const relay = new iden3.Relay('http://127.0.0.1:5000');
relay.getRelayRoot()
.then(res => {
console.log('res.data', res.data);
});
Response:
{
contractRoot: '0x6e4659fedd8ff00b14e487d6d5f537646f07bde944d935d51bd9de807d6fc1c9',
root: '0x0000000000000000000000000000000000000000000000000000000000000000'
}
relay.getIDRoot(id.kc.addressHex())
.then(res => {
console.log('res.data', res.data);
});
Response:
{
idRoot: '0x0000000000000000000000000000000000000000000000000000000000000000',
idRootProof: '0x0000000000000000000000000000000000000000000000000000000000000000',
root: '0x0000000000000000000000000000000000000000000000000000000000000000'
}
Creates a new AuthorizeKSignClaim, signs it, and sends it to the Relay.
relay.genericClaim(id.kc, ksign, 'iden3.io', 'default', 'data of the claim').then(res => {
// console.log('res.data', res.data);
expect(res.status).to.be.equal(200);
});
Creates a new authorizeKSignClaim, signs it, and sends it to the Relay.
relay.authorizeKSignClaim(id.kc, keyid, kSign.addressHex(), 'appToAuthName', 'authz', 1535208350, 1535208350).then(res => {
// console.log('res.data', res.data);
expect(res.status).to.be.equal(200);
});
Sends to the Relay a signed Claim.
relay.postClaim(idaddr, bytesSignedMsg)
.then(res => {
console.log('res.data', res.data);
});
The response is the ProofOfClaim, same as returned in relay.getClaimByHi().
relay.getClaimByHi(idaddr, hi)
.then(res => {
console.log('res.data', res.data);
});
Response, ProofOfClaim:
{
claimProof: {
Leaf: '0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c4969403074353f867ef725411de05e3d4b0a01c37cf7ad24bcc213141a05ed7726d7932a1f00000000bc8c480e68d0895f1e410f4e4ea6e2d6b160ca9f2077bb3f0400dd62421c97220536fd6ed2be29228e8db1315e8c6d7525f4bdf4dad9966a2e7371f0a24b1929ed765c0e7a3f2b4665a76a19d58173308bb34062000000005b816b9e000000005b816b9e',
Hi: '0x438a26007910a723fedf030efd08fed2d374634eb8866ce595c139ea341daa43',
Proof: '0x0000000000000000000000000000000000000000000000000000000000000000',
Root: '0xd1d3ebd84f46ec73767a2fe89930f33eef96ddf18c35e03faf03a98c8e6bf207'
},
setRootClaimProof: {
Leaf: '0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c49694030749b9a76a0132a0814192c05c9321efc30c7286f6187f18fc6b6858214fe963e0e00000000bc8c480e68d0895f1e410f4e4ea6e2d6b160ca9fd1d3ebd84f46ec73767a2fe89930f33eef96ddf18c35e03faf03a98c8e6bf207',
Hi: '0xbadb12c663dc83678de0709619fb8c67f939b7a2c5c658a6305fa4841e62e392',
Proof: '0x0000000000000000000000000000000000000000000000000000000000000000',
Root: '0xfd89568c4dfe0b22be91c810421dcf02ac7ca42bc005461886a443fb6e0ead78'
},
claimNonRevocationProof: {
Leaf: '0x0000000000000000000000000000000000000000000000000000000000000000',
Hi: '0x1d4221032dae2392d162cf09030f5ad9fb135380a49bb1e8caf549aaea42b53f',
Proof: '0x0000000000000000000000000000000000000000000000000000000000000004ce587b2d039c876de24e8b7fbdeb4cf6b84d542a60cdef47cf0ab29c631fba26',
Root: '0xd1d3ebd84f46ec73767a2fe89930f33eef96ddf18c35e03faf03a98c8e6bf207'
},
setRootClaimNonRevocationProof: {
Leaf: '0x0000000000000000000000000000000000000000000000000000000000000000',
Hi: '0x28f5ee91e756ec1a3d1ea9ca2a68b5dde6ded3ea98effeadcefbff9a352aa434',
Proof: '0x0000000000000000000000000000000000000000000000000000000000000002b8193081f59feef7baab60cd827267371b2e6495cd2efab189370e0e2ea5819c',
Root: '0xfd89568c4dfe0b22be91c810421dcf02ac7ca42bc005461886a443fb6e0ead78'
}
}
relay.getID('0x46b57a3f315f99a6de39406310f5bd0db03326c1')
.then(res => {
console.log('res.data', res.data);
});
Output:
{
IDAddr: '0x46b57a3f315f99a6de39406310f5bd0db03326c1',
LocalDb: {
Operational: '0x970e8128ab834e8eac17ab8e3812f010678cf791',
Relayer: '0xe0fbce58cfaa72812103f003adce3f284fe5fc7c',
Recoverer: '0x970e8128ab834e8eac17ab8e3812f010678cf791',
Revokator: '0x970e8128ab834e8eac17ab8e3812f010678cf791',
Impl: '0x2623ed1533d47d56f912300ae40f83b9370cead6'
},
Onchain: null
}
relay.resolveName('username@iden3.io')
.then(res => {
console.log('res.data', res.data);
});
Output:
{
claim: '0x3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c4969403074b7ae3d3a2056c54f48763999f3ff99caffaaba3bab58cae900000080000000008a440962fb17f0fe928a3d930137743fe63b8f4c0ce5a5da63991310103d9aef3cfc3a1edbf691316fec9b75970fbfb2b0e8d8edfc6ec7628db77c4969403074bc8c480e68d0895f1e410f4e4ea6e2d6b160ca9f',
ethID: '0xbc8c480e68d0895f1e410f4e4ea6e2d6b160ca9f'
}
// once have the QR data scanned, or the hex QR data copied
let qrJson = iden3.auth.parseQRhex(qrHex);
let qrKSign = iden3.utils.addrFromSig(qrJson.challenge, qrJson.signature);
// perform the AuthorizeKSignClaim over the qrKSign
id.authorizeKSignClaim(kc, id.keyOperational, qrKSign, 'appToAuthName', 'authz', unixtimeFrom, unixtimeUntil).then(res => {
let ksignProof = res.data.proofOfClaim;
// send the challenge, signature, KSign, and KSignProof to the qr url, that is the url of the backend of the centralized auth
iden3.auth.resolv(qrJson.url, id.keyOperational, qrJson.challenge, qrJson.signature, qrKSign, ksignProof).then(res => {
alert('centralized auth success, the website will refresh with the jwt');
})
.catch(function (error) {
alert(error);
});
})
.catch(function (error) {
alert(error);
});
The following instructions are for centralized apps, to integrate the iden3 system for authentication.
Once having a centrauth backend running ( https://github.com/iden3/go-iden3 ).
Include the iden3js library:
const iden3 = require('iden3');
Or in the html include:
<script src="iden3js-bundle.js"></script>
Add in the html the div that will contain the QR:
<div id="qrcodediv"></div>
<!-- and optionally, the textarea to place the qr data in hex format -->
<textarea id="qrHex" rows="4" cols="30" readonly="readonly"></textarea>
In the js:
let passphrase = 'this is a test passphrase';
const authurl = 'http://IPcentrauth:5000';
const authwsurl = 'ws://IPcentrauth:5000';
let kc = new iden3.KeyContainer('localstorage');
kc.unlock(passphrase);
let ksign = kc.generateKey();
let auth = new iden3.Auth(kc, ksign, authurl, authwsurl, function(authData) {
// callback that will be called when the websocket gets the token, after the backend checks the authentication (challenge, signature, KSign, KSignProof, etc)
alert('✔️ Logged in');
/*
authData = {
"success": true,
"token": "xxxxxxxx"
}
*/
});
auth.printQr('qrcodediv');
let qrHex = auth.qrHex(); // optional, to show the qr hex data
document.getElementById("qrHex").value = qrHex; // optional, to show the qr hex data
To run all tests, needs to have a running Relay node.
npm test
To generate the browserify bundle:
browserify index.js --standalone iden3 > iden3js-bundle.js
All code here is experimental and WIP
iden3js is part of the iden3 project copyright 2018 0kims association and published with GPL-3 license, please check the LICENSE file for more details.
FAQs
Javascript client library of the iden3 system.
The npm package iden3 receives a total of 1 weekly downloads. As such, iden3 popularity was classified as not popular.
We found that iden3 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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