solana/web3.js/test/connection.test.js

// @flow
import {
  Account,
  Connection,
  SystemProgram,
  sendAndConfirmTransaction,
  LAMPORTS_PER_SOL,
} from '../src';
import {DEFAULT_TICKS_PER_SLOT, NUM_TICKS_PER_SECOND} from '../src/timing';
import {mockRpc, mockRpcEnabled} from './__mocks__/node-fetch';
import {mockGetRecentBlockhash} from './mockrpc/get-recent-blockhash';
import {url} from './url';
import {sleep} from '../src/util/sleep';

if (!mockRpcEnabled) {
  // Testing max commitment level takes around 20s to complete
  jest.setTimeout(30000);
}

const errorMessage = 'Invalid request';
const errorResponse = {
  error: {
    message: errorMessage,
  },
  result: undefined,
};

test('get account info - error', () => {
  const account = new Account();
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getAccountInfo',
      params: [account.publicKey.toBase58()],
    },
    errorResponse,
  ]);

  return expect(connection.getAccountInfo(account.publicKey)).rejects.toThrow(
    errorMessage,
  );
});

test('get program accounts', async () => {
  const connection = new Connection(url, 'recent');
  const account0 = new Account();
  const account1 = new Account();
  const programId = new Account();
  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [
        account0.publicKey.toBase58(),
        LAMPORTS_PER_SOL,
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result:
        '0WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [
        account1.publicKey.toBase58(),
        0.5 * LAMPORTS_PER_SOL,
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result:
        '0WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  await connection.requestAirdrop(account0.publicKey, LAMPORTS_PER_SOL);
  await connection.requestAirdrop(account1.publicKey, 0.5 * LAMPORTS_PER_SOL);

  mockGetRecentBlockhash('recent');
  mockRpc.push([
    url,
    {
      method: 'sendTransaction',
    },
    {
      error: null,
      result:
        '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'getSignatureStatus',
      params: [
        [
          '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
        ],
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result: [
        {
          slot: 0,
          status: {Ok: null},
        },
      ],
    },
  ]);
  let transaction = SystemProgram.assign({
    fromPubkey: account0.publicKey,
    programId: programId.publicKey,
  });
  await sendAndConfirmTransaction(connection, transaction, account0);

  mockRpc.push([
    url,
    {
      method: 'sendTransaction',
    },
    {
      error: null,
      result:
        '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'getSignatureStatus',
      params: [
        [
          '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
        ],
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result: [
        {
          slot: 0,
          status: {Ok: null},
        },
      ],
    },
  ]);
  transaction = SystemProgram.assign({
    fromPubkey: account1.publicKey,
    programId: programId.publicKey,
  });

  await sendAndConfirmTransaction(connection, transaction, account1);

  mockGetRecentBlockhash('recent');
  const {feeCalculator} = await connection.getRecentBlockhash();

  mockRpc.push([
    url,
    {
      method: 'getProgramAccounts',
      params: [programId.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: [
        {
          account: {
            data: '',
            executable: false,
            lamports: LAMPORTS_PER_SOL - feeCalculator.lamportsPerSignature,
            owner: programId.publicKey.toBase58(),
            rentEpoch: 20,
          },
          pubkey: account0.publicKey.toBase58(),
        },
        {
          account: {
            data: '',
            executable: false,
            lamports:
              0.5 * LAMPORTS_PER_SOL - feeCalculator.lamportsPerSignature,
            owner: programId.publicKey.toBase58(),
            rentEpoch: 20,
          },
          pubkey: account1.publicKey.toBase58(),
        },
      ],
    },
  ]);
  const programAccounts = await connection.getProgramAccounts(
    programId.publicKey,
  );
  expect(programAccounts.length).toBe(2);

  programAccounts.forEach(function (element) {
    expect([
      account0.publicKey.toBase58(),
      account1.publicKey.toBase58(),
    ]).toEqual(expect.arrayContaining([element.pubkey]));
    if (element.pubkey == account0.publicKey) {
      expect(element.account.lamports).toBe(
        LAMPORTS_PER_SOL - feeCalculator.lamportsPerSignature,
      );
    } else {
      expect(element.account.lamports).toBe(
        0.5 * LAMPORTS_PER_SOL - feeCalculator.lamportsPerSignature,
      );
    }
  });
});

test('validatorExit', async () => {
  if (!mockRpcEnabled) {
    console.log('validatorExit skipped on live node');
    return;
  }
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'validatorExit',
    },
    {
      error: null,
      result: false,
    },
  ]);

  const result = await connection.validatorExit();
  expect(result).toBe(false);
});

test('get balance', async () => {
  const account = new Account();
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [account.publicKey.toBase58()],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: 0,
      },
    },
  ]);

  const balance = await connection.getBalance(account.publicKey);
  expect(balance).toBeGreaterThanOrEqual(0);
});

test('get inflation', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getInflation',
      params: [],
    },
    {
      error: null,
      result: {
        foundation: 0.05,
        foundationTerm: 7.0,
        initial: 0.15,
        storage: 0.1,
        taper: 0.15,
        terminal: 0.015,
      },
    },
  ]);

  const inflation = await connection.getInflation();

  for (const key of [
    'initial',
    'terminal',
    'taper',
    'foundation',
    'foundationTerm',
    'storage',
  ]) {
    expect(inflation).toHaveProperty(key);
    expect(inflation[key]).toBeGreaterThan(0);
  }
});

test('get epoch info', async () => {
  const connection = new Connection(url, 'recent');

  mockRpc.push([
    url,
    {
      method: 'getEpochInfo',
      params: [{commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        epoch: 0,
        slotIndex: 1,
        slotsInEpoch: 8192,
        absoluteSlot: 1,
      },
    },
  ]);

  const epochInfo = await connection.getEpochInfo();

  for (const key of ['epoch', 'slotIndex', 'slotsInEpoch', 'absoluteSlot']) {
    expect(epochInfo).toHaveProperty(key);
    expect(epochInfo[key]).toBeGreaterThanOrEqual(0);
  }
});

test('get epoch schedule', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getEpochSchedule',
      params: [],
    },
    {
      error: null,
      result: {
        firstNormalEpoch: 8,
        firstNormalSlot: 8160,
        leaderScheduleSlotOffset: 8192,
        slotsPerEpoch: 8192,
        warmup: true,
      },
    },
  ]);

  const epochSchedule = await connection.getEpochSchedule();

  for (const key of [
    'firstNormalEpoch',
    'firstNormalSlot',
    'leaderScheduleSlotOffset',
    'slotsPerEpoch',
  ]) {
    expect(epochSchedule).toHaveProperty('warmup');
    expect(epochSchedule).toHaveProperty(key);
    if (epochSchedule.warmup) {
      expect(epochSchedule[key]).toBeGreaterThan(0);
    }
  }
});

test('get slot', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getSlot',
    },
    {
      error: null,
      result: 123,
    },
  ]);

  const slotLeader = await connection.getSlot();
  if (mockRpcEnabled) {
    expect(slotLeader).toBe(123);
  } else {
    // No idea what the correct slot value should be on a live cluster, so
    // just check the type
    expect(typeof slotLeader).toBe('number');
  }
});

test('get slot leader', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getSlotLeader',
    },
    {
      error: null,
      result: '11111111111111111111111111111111',
    },
  ]);

  const slotLeader = await connection.getSlotLeader();
  if (mockRpcEnabled) {
    expect(slotLeader).toBe('11111111111111111111111111111111');
  } else {
    // No idea what the correct slotLeader value should be on a live cluster, so
    // just check the type
    expect(typeof slotLeader).toBe('string');
  }
});

test('get cluster nodes', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getClusterNodes',
    },
    {
      error: null,
      result: [
        {
          pubkey: '11111111111111111111111111111111',
          gossip: '127.0.0.0:1234',
          tpu: '127.0.0.0:1235',
          rpc: null,
        },
      ],
    },
  ]);

  const clusterNodes = await connection.getClusterNodes();
  if (mockRpcEnabled) {
    expect(clusterNodes).toHaveLength(1);
    expect(clusterNodes[0].pubkey).toBe('11111111111111111111111111111111');
    expect(typeof clusterNodes[0].gossip).toBe('string');
    expect(typeof clusterNodes[0].tpu).toBe('string');
    expect(clusterNodes[0].rpc).toBeNull();
  } else {
    // There should be at least one node (the node that we're talking to)
    expect(clusterNodes.length).toBeGreaterThan(0);
  }
});

test('getVoteAccounts', async () => {
  if (mockRpcEnabled) {
    console.log('non-live test skipped');
    return;
  }

  const connection = new Connection(url);
  const voteAccounts = await connection.getVoteAccounts();
  expect(
    voteAccounts.current.concat(voteAccounts.delinquent).length,
  ).toBeGreaterThan(0);
});

test('confirm transaction - error', async () => {
  const connection = new Connection(url);

  const badTransactionSignature = 'bad transaction signature';

  mockRpc.push([
    url,
    {
      method: 'confirmTransaction',
      params: [badTransactionSignature],
    },
    errorResponse,
  ]);

  await expect(
    connection.confirmTransaction(badTransactionSignature),
  ).rejects.toThrow(errorMessage);

  mockRpc.push([
    url,
    {
      method: 'getSignatureStatus',
      params: [[badTransactionSignature]],
    },
    errorResponse,
  ]);

  await expect(
    connection.getSignatureStatus(badTransactionSignature),
  ).rejects.toThrow(errorMessage);
});

test('get transaction count', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getTransactionCount',
      params: [],
    },
    {
      error: null,
      result: 1000000,
    },
  ]);

  const count = await connection.getTransactionCount();
  expect(count).toBeGreaterThanOrEqual(0);
});

test('get total supply', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getTotalSupply',
      params: [],
    },
    {
      error: null,
      result: 1000000,
    },
  ]);

  const count = await connection.getTotalSupply();
  expect(count).toBeGreaterThanOrEqual(0);
});

test('get minimum balance for rent exemption', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getMinimumBalanceForRentExemption',
      params: [512],
    },
    {
      error: null,
      result: 1000000,
    },
  ]);

  const count = await connection.getMinimumBalanceForRentExemption(512);
  expect(count).toBeGreaterThanOrEqual(0);
});

test('get confirmed block', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getSlot',
      params: [],
    },
    {
      error: null,
      result: 1,
    },
  ]);

  while ((await connection.getSlot()) <= 0) {
    continue;
  }

  mockRpc.push([
    url,
    {
      method: 'getConfirmedBlock',
      params: [0],
    },
    {
      error: null,
      result: {
        blockhash: 'H5nJ91eGag3B5ZSRHZ7zG5ZwXJ6ywCt2hyR8xCsV7xMo',
        previousBlockhash: 'H5nJ91eGag3B5ZSRHZ7zG5ZwXJ6ywCt2hyR8xCsV7xMo',
        parentSlot: 0,
        transactions: [],
      },
    },
  ]);

  // Block 0 never has any transactions in automation localnet
  const block0 = await connection.getConfirmedBlock(0);
  const blockhash0 = block0.blockhash;
  expect(block0.transactions.length).toBe(0);
  expect(blockhash0).not.toBeNull();
  expect(block0.previousBlockhash).not.toBeNull();
  expect(block0.parentSlot).toBe(0);

  mockRpc.push([
    url,
    {
      method: 'getConfirmedBlock',
      params: [1],
    },
    {
      error: null,
      result: {
        blockhash: '57zQNBZBEiHsCZFqsaY6h176ioXy5MsSLmcvHkEyaLGy',
        previousBlockhash: 'H5nJ91eGag3B5ZSRHZ7zG5ZwXJ6ywCt2hyR8xCsV7xMo',
        parentSlot: 0,
        transactions: [
          {
            meta: {
              fee: 10000,
              postBalances: [499260347380, 15298080, 1, 1, 1],
              preBalances: [499260357380, 15298080, 1, 1, 1],
              status: {Ok: null},
            },
            transaction: {
              message: {
                accountKeys: [
                  'va12u4o9DipLEB2z4fuoHszroq1U9NcAB9aooFDPJSf',
                  '57zQNBZBEiHsCZFqsaY6h176ioXy5MsSLmcvHkEyaLGy',
                  'SysvarS1otHashes111111111111111111111111111',
                  'SysvarC1ock11111111111111111111111111111111',
                  'Vote111111111111111111111111111111111111111',
                ],
                header: {
                  numReadonlySignedAccounts: 0,
                  numReadonlyUnsignedAccounts: 3,
                  numRequiredSignatures: 2,
                },
                instructions: [
                  {
                    accounts: [1, 2, 3],
                    data:
                      '37u9WtQpcm6ULa3VtWDFAWoQc1hUvybPrA3dtx99tgHvvcE7pKRZjuGmn7VX2tC3JmYDYGG7',
                    programIdIndex: 4,
                  },
                ],
                recentBlockhash: 'GeyAFFRY3WGpmam2hbgrKw4rbU2RKzfVLm5QLSeZwTZE',
              },
              signatures: [
                'w2Zeq8YkpyB463DttvfzARD7k9ZxGEwbsEw4boEK7jDp3pfoxZbTdLFSsEPhzXhpCcjGi2kHtHFobgX49MMhbWt',
                '4oCEqwGrMdBeMxpzuWiukCYqSfV4DsSKXSiVVCh1iJ6pS772X7y219JZP3mgqBz5PhsvprpKyhzChjYc3VSBQXzG',
              ],
            },
          },
        ],
      },
    },
  ]);

  // Find a block that has a transaction, usually Block 1
  let x = 1;
  while (x < 10) {
    const block1 = await connection.getConfirmedBlock(x);
    if (block1.transactions.length >= 1) {
      expect(block1.previousBlockhash).toBe(blockhash0);
      expect(block1.blockhash).not.toBeNull();
      expect(block1.parentSlot).toBe(0);
      expect(block1.transactions[0].transaction).not.toBeNull();
      break;
    }
    x++;
  }

  mockRpc.push([
    url,
    {
      method: 'getConfirmedBlock',
      params: [Number.MAX_SAFE_INTEGER],
    },
    {
      error: null,
      result: null,
    },
  ]);
  await expect(
    connection.getConfirmedBlock(Number.MAX_SAFE_INTEGER),
  ).rejects.toThrow();
});

test('get recent blockhash', async () => {
  const connection = new Connection(url);

  mockGetRecentBlockhash();

  const {blockhash, feeCalculator} = await connection.getRecentBlockhash();
  expect(blockhash.length).toBeGreaterThanOrEqual(43);
  expect(feeCalculator.lamportsPerSignature).toBeGreaterThanOrEqual(0);
});

test('getVersion', async () => {
  const connection = new Connection(url);

  mockRpc.push([
    url,
    {
      method: 'getVersion',
      params: [],
    },
    {
      error: null,
      result: {'solana-core': '0.20.4'},
    },
  ]);

  const version = await connection.getVersion();
  expect(version['solana-core']).toBeTruthy();
});

test('request airdrop', async () => {
  const account = new Account();
  const connection = new Connection(url, 'recent');

  mockRpc.push([
    url,
    {
      method: 'getMinimumBalanceForRentExemption',
      params: [0, {commitment: 'recent'}],
    },
    {
      error: null,
      result: 50,
    },
  ]);

  const minimumAmount = await connection.getMinimumBalanceForRentExemption(
    0,
    'recent',
  );

  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [
        account.publicKey.toBase58(),
        minimumAmount + 40,
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result:
        '1WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [account.publicKey.toBase58(), 2, {commitment: 'recent'}],
    },
    {
      error: null,
      result:
        '2WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [account.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: minimumAmount + 42,
      },
    },
  ]);

  await connection.requestAirdrop(account.publicKey, minimumAmount + 40);
  await connection.requestAirdrop(account.publicKey, 2);

  const balance = await connection.getBalance(account.publicKey);
  expect(balance).toBe(minimumAmount + 42);

  mockRpc.push([
    url,
    {
      method: 'getAccountInfo',
      params: [account.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: {
          owner: '11111111111111111111111111111111',
          lamports: minimumAmount + 42,
          data: '',
          executable: false,
        },
      },
    },
  ]);

  const accountInfo = await connection.getAccountInfo(account.publicKey);
  expect(accountInfo.lamports).toBe(minimumAmount + 42);
  expect(accountInfo.data).toHaveLength(0);
  expect(accountInfo.owner).toEqual(SystemProgram.programId);
});

// expected to take around 20s
test('request airdrop - max commitment', async () => {
  const account = new Account();
  const connection = new Connection(url, 'max');

  mockRpc.push([
    url,
    {
      method: 'getMinimumBalanceForRentExemption',
      params: [0, {commitment: 'recent'}],
    },
    {
      error: null,
      result: 50,
    },
  ]);

  const minimumAmount = await connection.getMinimumBalanceForRentExemption(
    0,
    'recent',
  );

  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [
        account.publicKey.toBase58(),
        minimumAmount + 40,
        {commitment: 'max'},
      ],
    },
    {
      error: null,
      result:
        '1WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [account.publicKey.toBase58(), {commitment: 'max'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: minimumAmount + 40,
      },
    },
  ]);

  await connection.requestAirdrop(account.publicKey, minimumAmount + 40);
  const balance = await connection.getBalance(account.publicKey);
  expect(balance).toBe(minimumAmount + 40);
});

test('transaction', async () => {
  const accountFrom = new Account();
  const accountTo = new Account();
  const connection = new Connection(url, 'recent');

  mockRpc.push([
    url,
    {
      method: 'getMinimumBalanceForRentExemption',
      params: [0, {commitment: 'recent'}],
    },
    {
      error: null,
      result: 50,
    },
  ]);

  const minimumAmount = await connection.getMinimumBalanceForRentExemption(
    0,
    'recent',
  );

  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [
        accountFrom.publicKey.toBase58(),
        minimumAmount + 100010,
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result:
        '0WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [accountFrom.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: minimumAmount + 100010,
      },
    },
  ]);
  await connection.requestAirdrop(
    accountFrom.publicKey,
    minimumAmount + 100010,
  );
  expect(await connection.getBalance(accountFrom.publicKey)).toBe(
    minimumAmount + 100010,
  );

  mockRpc.push([
    url,
    {
      method: 'requestAirdrop',
      params: [
        accountTo.publicKey.toBase58(),
        minimumAmount + 21,
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result:
        '8WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);
  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [accountTo.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: minimumAmount + 21,
      },
    },
  ]);
  await connection.requestAirdrop(accountTo.publicKey, minimumAmount + 21);
  expect(await connection.getBalance(accountTo.publicKey)).toBe(
    minimumAmount + 21,
  );

  mockGetRecentBlockhash('recent');
  mockRpc.push([
    url,
    {
      method: 'sendTransaction',
    },
    {
      error: null,
      result:
        '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
    },
  ]);

  const transaction = SystemProgram.transfer({
    fromPubkey: accountFrom.publicKey,
    toPubkey: accountTo.publicKey,
    lamports: 10,
  });
  const signature = await connection.sendTransaction(transaction, accountFrom);

  mockRpc.push([
    url,
    {
      method: 'confirmTransaction',
      params: [
        '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: true,
      },
    },
  ]);

  let i = 0;
  for (;;) {
    if (await connection.confirmTransaction(signature)) {
      break;
    }
    console.log('not confirmed', signature);
    expect(mockRpcEnabled).toBe(false);
    expect(++i).toBeLessThan(10);
    await sleep(500);
  }

  mockRpc.push([
    url,
    {
      method: 'getSignatureStatus',
      params: [
        [
          '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
        ],
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result: [
        {
          slot: 0,
          status: {Ok: null},
        },
      ],
    },
  ]);

  const response = await connection.getSignatureStatus(signature);
  if (response !== null) {
    expect(typeof response.slot).toEqual('number');
    expect(response.status).toEqual({Ok: null});
  } else {
    expect(response).not.toBeNull();
  }

  const unprocessedSignature =
    '8WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk';
  mockRpc.push([
    url,
    {
      method: 'getSignatureStatus',
      params: [
        [
          '3WE5w4B7v59x6qjyC4FbG2FEKYKQfvsJwqSxNVmtMjT8TQ31hsZieDHcSgqzxiAoTL56n2w5TncjqEKjLhtF4Vk',
          unprocessedSignature,
        ],
        {commitment: 'recent'},
      ],
    },
    {
      error: null,
      result: [
        {
          slot: 0,
          status: {Ok: null},
        },
        null,
      ],
    },
  ]);

  const responses = await connection.getSignatureStatusBatch([
    signature,
    unprocessedSignature,
  ]);
  expect(responses.length).toEqual(2);
  expect(responses[0]).toEqual(response);
  expect(responses[1]).toBeNull();

  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [accountFrom.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: minimumAmount + 2,
      },
    },
  ]);

  // accountFrom may have less than 100000 due to transaction fees
  const balance = await connection.getBalance(accountFrom.publicKey);
  expect(balance).toBeGreaterThan(0);
  expect(balance).toBeLessThanOrEqual(minimumAmount + 100000);

  mockRpc.push([
    url,
    {
      method: 'getBalance',
      params: [accountTo.publicKey.toBase58(), {commitment: 'recent'}],
    },
    {
      error: null,
      result: {
        context: {
          slot: 11,
        },
        value: minimumAmount + 31,
      },
    },
  ]);
  expect(await connection.getBalance(accountTo.publicKey)).toBe(
    minimumAmount + 31,
  );
});

test('multi-instruction transaction', async () => {
  if (mockRpcEnabled) {
    console.log('non-live test skipped');
    return;
  }

  const accountFrom = new Account();
  const accountTo = new Account();
  const connection = new Connection(url, 'recent');

  await connection.requestAirdrop(accountFrom.publicKey, LAMPORTS_PER_SOL);
  expect(await connection.getBalance(accountFrom.publicKey)).toBe(
    LAMPORTS_PER_SOL,
  );

  const minimumAmount = await connection.getMinimumBalanceForRentExemption(
    0,
    'recent',
  );

  await connection.requestAirdrop(accountTo.publicKey, minimumAmount + 21);
  expect(await connection.getBalance(accountTo.publicKey)).toBe(
    minimumAmount + 21,
  );

  // 1. Move(accountFrom, accountTo)
  // 2. Move(accountTo, accountFrom)
  const transaction = SystemProgram.transfer({
    fromPubkey: accountFrom.publicKey,
    toPubkey: accountTo.publicKey,
    lamports: 100,
  }).add(
    SystemProgram.transfer({
      fromPubkey: accountTo.publicKey,
      toPubkey: accountFrom.publicKey,
      lamports: 100,
    }),
  );
  const signature = await connection.sendTransaction(
    transaction,
    accountFrom,
    accountTo,
  );
  let i = 0;
  for (;;) {
    if (await connection.confirmTransaction(signature)) {
      break;
    }

    expect(mockRpcEnabled).toBe(false);
    expect(++i).toBeLessThan(10);
    await sleep(500);
  }

  const response = await connection.getSignatureStatus(signature);
  if (response !== null) {
    expect(typeof response.slot).toEqual('number');
    expect(response.status).toEqual({Ok: null});
  } else {
    expect(response).not.toBeNull();
  }

  // accountFrom may have less than LAMPORTS_PER_SOL due to transaction fees
  expect(await connection.getBalance(accountFrom.publicKey)).toBeGreaterThan(0);
  expect(
    await connection.getBalance(accountFrom.publicKey),
  ).toBeLessThanOrEqual(LAMPORTS_PER_SOL);

  expect(await connection.getBalance(accountTo.publicKey)).toBe(
    minimumAmount + 21,
  );
});

test('account change notification', async () => {
  if (mockRpcEnabled) {
    console.log('non-live test skipped');
    return;
  }

  const connection = new Connection(url, 'recent');
  const owner = new Account();
  const programAccount = new Account();

  const mockCallback = jest.fn();

  const subscriptionId = connection.onAccountChange(
    programAccount.publicKey,
    mockCallback,
  );

  const balanceNeeded = Math.max(
    await connection.getMinimumBalanceForRentExemption(0),
    1,
  );

  await connection.requestAirdrop(owner.publicKey, LAMPORTS_PER_SOL);
  try {
    let transaction = SystemProgram.transfer({
      fromPubkey: owner.publicKey,
      toPubkey: programAccount.publicKey,
      lamports: balanceNeeded,
    });
    await sendAndConfirmTransaction(connection, transaction, owner);
  } catch (err) {
    await connection.removeAccountChangeListener(subscriptionId);
    throw err;
  }

  // Wait for mockCallback to receive a call
  let i = 0;
  for (;;) {
    if (mockCallback.mock.calls.length > 0) {
      break;
    }

    if (++i === 30) {
      throw new Error('Account change notification not observed');
    }
    // Sleep for a 1/4 of a slot, notifications only occur after a block is
    // processed
    await sleep((250 * DEFAULT_TICKS_PER_SLOT) / NUM_TICKS_PER_SECOND);
  }

  await connection.removeAccountChangeListener(subscriptionId);

  expect(mockCallback.mock.calls[0][0].lamports).toBe(balanceNeeded);
  expect(mockCallback.mock.calls[0][0].owner).toEqual(SystemProgram.programId);
});

test('program account change notification', async () => {
  if (mockRpcEnabled) {
    console.log('non-live test skipped');
    return;
  }

  const connection = new Connection(url, 'recent');
  const owner = new Account();
  const programAccount = new Account();

  // const mockCallback = jest.fn();

  const balanceNeeded = await connection.getMinimumBalanceForRentExemption(0);

  let notified = false;
  const subscriptionId = connection.onProgramAccountChange(
    SystemProgram.programId,
    keyedAccountInfo => {
      if (keyedAccountInfo.accountId !== programAccount.publicKey.toString()) {
        //console.log('Ignoring another account', keyedAccountInfo);
        return;
      }
      expect(keyedAccountInfo.accountInfo.lamports).toBe(balanceNeeded);
      expect(keyedAccountInfo.accountInfo.owner).toEqual(
        SystemProgram.programId,
      );
      notified = true;
    },
  );

  await connection.requestAirdrop(owner.publicKey, LAMPORTS_PER_SOL);
  try {
    let transaction = SystemProgram.transfer({
      fromPubkey: owner.publicKey,
      toPubkey: programAccount.publicKey,
      lamports: balanceNeeded,
    });
    await sendAndConfirmTransaction(connection, transaction, owner);
  } catch (err) {
    await connection.removeProgramAccountChangeListener(subscriptionId);
    throw err;
  }

  // Wait for mockCallback to receive a call
  let i = 0;
  while (!notified) {
    //for (;;) {
    if (++i === 30) {
      throw new Error('Program change notification not observed');
    }
    // Sleep for a 1/4 of a slot, notifications only occur after a block is
    // processed
    await sleep((250 * DEFAULT_TICKS_PER_SLOT) / NUM_TICKS_PER_SECOND);
  }

  await connection.removeProgramAccountChangeListener(subscriptionId);
});

test('slot notification', async () => {
  if (mockRpcEnabled) {
    console.log('non-live test skipped');
    return;
  }

  const connection = new Connection(url, 'recent');

  // let notified = false;
  const subscriptionId = connection.onSlotChange(slotInfo => {
    expect(slotInfo.parent).toBeDefined();
    expect(slotInfo.slot).toBeDefined();
    expect(slotInfo.root).toBeDefined();
    expect(slotInfo.slot).toBeGreaterThan(slotInfo.parent);
    expect(slotInfo.slot).toBeGreaterThanOrEqual(slotInfo.root);
    // notified = true;
  });

  //
  // FIXME: enable this check when slotNotification is live
  //
  // // Wait for mockCallback to receive a call
  // let i = 0;
  // while (!notified) {
  //   //for (;;) {
  //   if (++i === 30) {
  //     throw new Error('Slot change notification not observed');
  //   }
  //   // Sleep for a 1/4 of a slot, notifications only occur after a block is
  //   // processed
  //   await sleep((250 * DEFAULT_TICKS_PER_SLOT) / NUM_TICKS_PER_SECOND);
  // }

  await connection.removeSlotChangeListener(subscriptionId);
});