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+import os
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+import time
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+
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+import infra.basetest
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+
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+
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+class TestBitcoin(infra.basetest.BRTest):
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+ # infra.basetest.BASIC_TOOLCHAIN_CONFIG cannot be used as it does
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+ # not include BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS
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+ # needed by bitcoin. This config also uses an ext4 rootfs as
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+ # bitcoind needs some free disk space to start (so we avoid having
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+ # a larger initrd in RAM).
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+ config = \
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+ """
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+ BR2_aarch64=y
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+ BR2_TOOLCHAIN_EXTERNAL=y
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+ BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
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+ BR2_LINUX_KERNEL=y
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+ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
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+ BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.1.81"
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+ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
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+ BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
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+ BR2_PACKAGE_BITCOIN=y
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+ BR2_PACKAGE_BITCOIN_WALLET=y
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+ BR2_TARGET_ROOTFS_EXT2=y
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+ BR2_TARGET_ROOTFS_EXT2_4=y
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+ BR2_TARGET_ROOTFS_EXT2_SIZE="256M"
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+ # BR2_TARGET_ROOTFS_TAR is not set
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+ """
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+ # Command prefix for the bitcoin command line interface.
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+ cli_cmd = "bitcoin-cli -regtest"
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+
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+ def create_btc_wallet(self, wallet_name):
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+ """Create an empty wallet."""
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+ cmd = f"{self.cli_cmd} -named createwallet wallet_name={wallet_name}"
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+ self.assertRunOk(cmd)
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+
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+ def gen_btc_address(self, wallet_name):
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+ """Generate an address in a wallet."""
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+ cmd = f"{self.cli_cmd} -rpcwallet={wallet_name} getnewaddress"
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+ out, ret = self.emulator.run(cmd)
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+ self.assertEqual(ret, 0)
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+ return out[0]
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+
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+ def init_wallet(self, wallet_name):
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+ """Create a wallet and generate an address in it."""
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+ self.create_btc_wallet(wallet_name)
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+ return self.gen_btc_address(wallet_name)
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+
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+ def get_wallet_balance(self, wallet):
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+ """Return the (confirmed) balance of a wallet."""
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+ cmd = f"{self.cli_cmd} -rpcwallet={wallet} getbalance"
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+ out, ret = self.emulator.run(cmd)
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+ self.assertEqual(ret, 0)
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+ return float(out[0])
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+
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+ def get_wallet_unconfirmed_balance(self, wallet):
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+ """Return the unconfirmed balance of a wallet."""
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+ cmd = f"{self.cli_cmd} -rpcwallet={wallet} getunconfirmedbalance"
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+ out, ret = self.emulator.run(cmd)
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+ self.assertEqual(ret, 0)
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+ return float(out[0])
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+
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+ def get_block_count(self):
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+ """Returns the height of the most-work fully-validated chain."""
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+ cmd = f"{self.cli_cmd} getblockcount"
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+ out, ret = self.emulator.run(cmd)
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+ self.assertEqual(ret, 0)
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+ return int(out[0])
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+
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+ def test_run(self):
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+ drive = os.path.join(self.builddir, "images", "rootfs.ext4")
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+ kern = os.path.join(self.builddir, "images", "Image")
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+ self.emulator.boot(arch="aarch64",
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+ kernel=kern,
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+ kernel_cmdline=["root=/dev/vda console=ttyAMA0"],
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+ options=["-M", "virt",
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+ "-cpu", "cortex-a53",
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+ "-m", "256M",
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+ "-drive", f"file={drive},if=virtio,format=raw"])
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+ self.emulator.login()
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+
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+ # Values for the test.
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+ wallet1 = "AliceWallet"
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+ wallet2 = "BobWallet"
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+ btc_test_amount = 10
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+ btc_fee = 0.00001
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+ req_blk_count = 101
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+
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+ # Check the binary can execute.
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+ self.assertRunOk("bitcoind --version")
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+
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+ # This cleanup is useful when run-test -k is used. It makes
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+ # this test idempotent. Since the drive storage is preserved
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+ # between reboots, this cleanup will make sure the test always
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+ # starts from a clean state.
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+ cmd = "rm -rf ~/.bitcoin"
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+ self.assertRunOk(cmd)
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+
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+ # The bitcoin daemon is not started. A client ping is expected
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+ # to fail.
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+ ping_cmd = f"{self.cli_cmd} ping"
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+ _, ret = self.emulator.run(ping_cmd)
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+ self.assertNotEqual(ret, 0)
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+
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+ # Start the daemon.
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+ cmd = f"bitcoind -regtest -daemonwait -fallbackfee={btc_fee:f}"
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+ self.assertRunOk(cmd)
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+
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+ time.sleep(2 * self.timeout_multiplier)
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+
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+ # Now the daemon is started, the ping is expected to succeed.
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+ self.assertRunOk(ping_cmd)
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+
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+ # We create two wallets and addresses.
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+ btc_addr1 = self.init_wallet(wallet1)
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+ btc_addr2 = self.init_wallet(wallet2)
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+
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+ # Since the regression test block chain is at its genesis
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+ # block, we expect a height of zero.
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+ cur_blk_cnt = self.get_block_count()
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+ self.assertEqual(cur_blk_cnt, 0)
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+
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+ # We also expect our wallets to be empty.
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+ for wallet in [wallet1, wallet2]:
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+ balance = self.get_wallet_balance(wallet)
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+ self.assertAlmostEqual(balance, 0.0)
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+
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+ # We request the generation of several blocks for address
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+ # #1. We should receive the 50 BTC reward at this address.
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+ cmd = self.cli_cmd
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+ cmd += f" generatetoaddress {req_blk_count} {btc_addr1}"
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+ self.assertRunOk(cmd)
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+
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+ # We should now see the previously created blocks.
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+ cur_blk_cnt = self.get_block_count()
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+ self.assertEqual(cur_blk_cnt, req_blk_count)
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+
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+ # We should also see the 50 BTC reward in the wallet #1.
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+ balance = self.get_wallet_balance(wallet1)
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+ self.assertAlmostEqual(balance, 50.0)
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+
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+ # The wallet #2 should still be empty.
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+ balance = self.get_wallet_balance(wallet2)
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+ self.assertAlmostEqual(balance, 0.0)
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+
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+ # We send an amount from wallet #1 to #2.
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+ cmd = f"{self.cli_cmd} -rpcwallet={wallet1}"
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+ cmd += f" sendtoaddress {btc_addr2} {btc_test_amount}"
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+ self.assertRunOk(cmd)
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+
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+ # The wallet #1 balance is expected to be subtracted by the
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+ # spent amount and the transaction fees.
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+ expected_balance = 50 - btc_test_amount - btc_fee
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+ balance = self.get_wallet_balance(wallet1)
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+ self.assertAlmostEqual(balance, expected_balance, places=4)
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+
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+ # The transaction is sent, but not confirmed yet. So we should
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+ # still see a (confirmed) balance of zero.
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+ balance = self.get_wallet_balance(wallet2)
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+ self.assertAlmostEqual(balance, 0.0)
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+
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+ # We should see the transferred amount in the unconfirmed
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+ # balance.
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+ balance = self.get_wallet_unconfirmed_balance(wallet2)
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+ self.assertAlmostEqual(balance, btc_test_amount)
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+
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+ # We generate 1 block to address #2. This action will confirm
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+ # the previous transaction (but this will not give the 50 BTC
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+ # reward).
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+ cmd = f"{self.cli_cmd} generatetoaddress 1 {btc_addr2}"
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+ self.assertRunOk(cmd)
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+
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+ # We should see one more block.
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+ cur_blk_cnt = self.get_block_count()
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+ self.assertEqual(cur_blk_cnt, req_blk_count + 1)
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+
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+ # We should now see the amount in the confirmed balance.
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+ balance = self.get_wallet_balance(wallet2)
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+ self.assertAlmostEqual(balance, btc_test_amount)
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+
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+ # The unconfirmed balance should now be zero.
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+ balance = self.get_wallet_unconfirmed_balance(wallet2)
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+ self.assertAlmostEqual(balance, 0.0)
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Julien Olivain