How to get the sequence number for an account id?

Question

In the below code, I explicitly gave the sequence number. How can I get the sequence number by giving the public key? Is there a way to get the sequence number of an account?

var StellarSdk = require('stellar-sdk');
StellarSdk.Network.useTestNetwork();
var an_account = new StellarSdk.Account("GCEZWKCA5VLDNRLN3RPRJMRZOX3Z6G5CHCGSNFHEYVXM3XOJMDS674JZ", 46316927324160);

Answer 1

Try this:

var StellarSdk = require('stellar-sdk');
var server = new StellarSdk.Server('https://horizon-testnet.stellar.org'); 
server.loadAccount("GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD")
  .then(function(account) { console.log(account.sequence) })

Returns:

33845557768224768

---

Also try:

server.loadAccount("GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD")
  .then(function(account) { console.log(account) })

Response looks like:

AccountResponse {
  _baseAccount:
   Account {
     _accountId: 'GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD',
     sequence: BigNumber { s: 1, e: 16, c: [Array] } },
  _links:
   { self:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD' },
     transactions:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/transactions{?cursor,limit,order}',
        templated: true },
     operations:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/operations{?cursor,limit,order}',
        templated: true },
     payments:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/payments{?cursor,limit,order}',
        templated: true },
     effects:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/effects{?cursor,limit,order}',
        templated: true },
     offers:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/offers{?cursor,limit,order}',
        templated: true },
     trades:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/trades{?cursor,limit,order}',
        templated: true },
     data:
      { href: 'https://horizon-testnet.stellar.org/accounts/GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD/data/{key}',
        templated: true } },
  id: 'GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD',
  paging_token: '',
  account_id: 'GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD',
  sequence: '33845557768224768',
  subentry_count: 0,
  thresholds: { low_threshold: 0, med_threshold: 0, high_threshold: 0 },
  flags: { auth_required: false, auth_revocable: false },
  balances: [ { balance: '10000.0000000', asset_type: 'native' } ],
  signers:
   [ { public_key: 'GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD',
       weight: 1,
       key: 'GBFXHIQPYKUE7WPIACEVBIR3TRFKSYVO3LNGMQCZWNQQGRGPPGKOV7UD',
       type: 'ed25519_public_key' } ],
  data: [Function],
  self: [Function],
  transactions: [Function],
  operations: [Function],
  payments: [Function],
  effects: [Function],
  offers: [Function],
  trades: [Function],
  data_attr: {} }