ync (config, memo, from = 'bob', to = 'alice') => {
              return api.transact({
                actions: [{
                  account: 'eosio.token',
                  name: 'transfer',
                  authorization: [{
                    actor: from,
                    permission: 'active',
                  }],
                  data: {
                    from,
                    to,
                    quantity: '0.0001 SYS',
                    memo,
                  },
                }]