Build on Ambr

const response = await fetch('https://getamber.dev/api/v1/contracts', {
  method: 'POST',
  headers: {
    'X-API-Key': '<API_KEY>',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    template: 'd1-general-auth',
    parameters: {
      principal_name: 'Acme Analytics Ltd.',
      principal_type: 'corporation',
      principal_registration_number: 'DE-5589021',
      principal_address: '1209 Orange St, Wilmington, DE',
      agent_id: '0x7a3b...9f2e',
      agent_type: 'autonomous',
      scope: 'procurement and vendor payments',
      categories: ['procurement', 'api-calls'],
      spending_limit_per_tx: 2500,
      spending_limit_monthly: 10000,
      duration_months: 12,
      governing_law: 'Delaware',
    },
    principal_declaration: {
      agent_id: '0x7a3b...9f2e',
      principal_name: 'Acme Analytics Ltd.',
      principal_type: 'company',
    },
  }),
});
// response.status → 'draft'
// response.sign_url → '/api/v1/contracts/amb-2026-0001/sign'

const message = [
  'I am signing Ambr contract amb-2026-0001',
  '',
  'Contract SHA-256: <sha256_hash>',
  '',
  'Timestamp: ' + new Date().toISOString(),
].join('\n');

const response = await fetch(
  'https://getamber.dev/api/v1/contracts/amb-2026-0001/sign',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      wallet_address: '0x7a3b...9f2e',
      signature: await wallet.signMessage(message),
      message,
    }),
  }
);
// Bilateral — first sig:  draft → pending_signature
//             second sig: pending_signature → active
// One-sided (p2) — principal's sig: draft → active

const contract = await fetch(
  'https://getamber.dev/api/v1/contracts/amb-2026-0001',
  { headers: { 'X-API-Key': '<API_KEY>' } }
).then(r => r.json());

// contract.status → 'draft' | 'awaiting_principal_approval' | 'handshake'
//                   | 'pending_signature' | 'active' | 'amended'
//                   | 'revoked' | 'expired' | 'terminated'
// contract.sha256_hash → 'a1b2c3...'
// contract.amendment_chain → [{ hash, parent_hash, type }]

const status = await fetch(
  'https://getamber.dev/api/v1/contracts/amb-2026-0001/status'
).then(r => r.json());

// status.status             → 'active'
// status.is_currently_valid → true only while active, not revoked, not expired
// status.is_expired         → true once expiry_date is in the past
// status.revoked_at         → null | ISO timestamp
// status.expiry_date        → null | ISO timestamp

const response = await fetch(
  'https://getamber.dev/api/v1/contracts/amb-2026-0001/revoke',
  {
    method: 'POST',
    headers: {
      'X-API-Key': '<API_KEY>',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({ reason: 'Engagement ended early' }),
  }
);
// Wallet auth instead of API key: send wallet_address + signature + message
// in the body. The signed message must state revocation intent and contain
// the contract SHA-256 hash, e.g.:
//   "I revoke Ambr contract amb-2026-0001 with hash <sha256_hash>"
//
// response.status → 'revoked' (terminal — cannot be undone)
// response.cascade.children_revoked → child delegations revoked with the parent

const response = await fetch(
  'https://getamber.dev/api/v1/contracts/amb-2026-0001/handshake',
  {
    method: 'POST',
    headers: {
      'X-API-Key': '<API_KEY>',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      action: 'accept', // 'accept' | 'reject' | 'request_changes'
      visibility: 'private', // 'private' | 'metadata_only' | 'public' | 'encrypted'
      message: 'Terms accepted. Proceeding to signature.',
    }),
  }
);
// action: accept → draft → pending_signature
// action: request_changes → remains draft with change request attached

const response = await fetch(
  'https://getamber.dev/api/v1/contracts/amb-2026-0001/wallet-auth',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      wallet_address: '0x7a3b...9f2e',
      signature: '0xabcd...1234',
      message: 'Authenticate wallet for contract amb-2026-0001',
    }),
  }
);
// response.access_token → short-lived JWT for contract reads

const response = await fetch(
  'https://getamber.dev/api/v1/dashboard/wallet-auth',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      wallet_address: '0x7a3b...9f2e',
      signature: '0xabcd...1234',
      message: 'Sign in to Ambr Dashboard',
    }),
  }
);
// response.session_token → use in Authorization header for dashboard API

const response = await fetch(
  'https://getamber.dev/api/v1/keys',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      email: 'dev@yourco.com',
      tier: 'developer', // free — or 'startup' ($49 pack) / 'scale' ($199 pack)
      // tx_hash: '0x9876...fedc', // required for paid tiers (Base L2 USDC)
    }),
  }
);
// response.api_key → 'amb_...' — shown once, save it
// response.credits → 25 (developer) | 200 (startup) | 1000 (scale)