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import { Request, Response } from 'express'; | ||
import { VerifiableCredential, SignOptions } from '@web5/credentials'; | ||
import { DidKeyMethod, PortableDid } from '@web5/dids'; | ||
import { Ed25519, PrivateKeyJwk } from '@web5/crypto'; | ||
import { VerifiableCredential } from '@web5/credentials'; | ||
import { DidKeyMethod } from '@web5/dids'; | ||
import { paths } from './openapi.js'; | ||
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type Signer = (data: Uint8Array) => Promise<Uint8Array>; | ||
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let _ownDid: PortableDid; | ||
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async function getOwnDid(): Promise<PortableDid> { | ||
if(_ownDid) { | ||
return _ownDid; | ||
} | ||
_ownDid = await DidKeyMethod.create(); | ||
return _ownDid; | ||
} | ||
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export async function credentialIssue(req: Request, res: Response) { | ||
const body: paths["/credentials/issue"]["post"]["requestBody"]["content"]["application/json"] = | ||
req.body; | ||
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const ownDid = await getOwnDid() | ||
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// build signing options | ||
const [signingKeyPair] = ownDid.keySet.verificationMethodKeys!; | ||
const subjectIssuerDid = body.credential.credentialSubject["id"] as string; | ||
const signer = EdDsaSigner(signingKeyPair.privateKeyJwk as PrivateKeyJwk); | ||
const signOptions: SignOptions = { | ||
issuerDid : ownDid.did, | ||
subjectDid : subjectIssuerDid, | ||
kid : '#' + ownDid.did.split(':')[2], | ||
signer : signer | ||
}; | ||
const ownDid = await DidKeyMethod.create(); | ||
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const vc: VerifiableCredential = VerifiableCredential.create({ | ||
type: body.credential.type[body.credential.type.length - 1], | ||
issuer: body.credential.issuer, | ||
subject: subjectIssuerDid, | ||
subject: body.credential.credentialSubject["id"] as string, | ||
data: body.credential.credentialSubject | ||
}); | ||
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const vcJwt: string = await vc.sign(signOptions); | ||
const vcJwt: string = await vc.sign({did: ownDid}); | ||
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const resp: paths["/credentials/issue"]["post"]["responses"]["200"]["content"]["application/json"] = | ||
{ | ||
verifiableCredential: {data: vcJwt} | ||
}; | ||
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res.json(resp); | ||
} | ||
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function EdDsaSigner(privateKey: PrivateKeyJwk): Signer { | ||
return async (data: Uint8Array): Promise<Uint8Array> => { | ||
const signature = await Ed25519.sign({ data, key: privateKey}); | ||
return signature; | ||
}; | ||
} |
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