import { Notareum } from "@notareum/sdk";

const ntm = Notareum({ provider, signer: hsmSigner, contracts });

async function issueDepositNota(userId: string, userAddr: string, chainId: number) {
  const nota = await ntm.nota
    .create({
      type: "address",
      chainId,
      chainName: chainIdToName(chainId),
      identifier: userAddr,
      name: `CoolExchange deposit for ${userId}`,
      description: "Single-use deposit address. Valid 24 hours.",
      resourceMetadata: {
        exchangeUserId: userId,
        validFrom: Math.floor(Date.now() / 1000),
        validUntil: Math.floor(Date.now() / 1000) + 86400,
        depositChainIds: [chainId],
        memoRequired: false,
      },
      issuerName: "CoolExchange",
      issuerEntityType: "organization",
      issuerDid: "did:web:coolexchange.com",
    })
    .validate()
    .sign(hsmSigner);

  return nota.serialize();
}

import { Notareum, VerificationLevel } from "@notareum/sdk";

const ntm = Notareum({ provider, contracts });

async function verifyDepositAddress(notaStr: string) {
  const nota = ntm.nota.parse(notaStr);
  ntm.nota.validate(nota);

  // The signing identity must be a registered, institutional, non-revoked issuer
  const issuerId = ntm.registry.computeIssuerId(nota.signature.signer);
  const issuer = await ntm.registry.getIssuer(issuerId);
  if (!issuer.exists || issuer.isRevoked) {
    throw new Error("Exchange identity not recognized");
  }
  if (VerificationLevel.rank(issuer.level) < VerificationLevel.rank("institutional")) {
    throw new Error("Exchange below required verification level");
  }

  // Validity window
  const now = Math.floor(Date.now() / 1000);
  const { validFrom, validUntil } = nota.resource.resourceMetadata;
  if (now < validFrom || now > validUntil) {
    throw new Error("Deposit address expired. Request a new one.");
  }

  return {
    address: nota.resource.identifier,
    exchange: nota.issuer.name,
    userId: nota.resource.resourceMetadata.exchangeUserId,
    expiresAt: validUntil,
  };
}

{
  "travelRule": {
    "originator": {
      "name": "Alice Chen",
      "vaspId": "vasp:coolexchange",
      "reference": "cx:user:12345"
    },
    "beneficiary": {
      "vaspId": "vasp:otherexchange",
      "reference": "oex:user:67890"
    }
  }
}