Whitepaper - Ethereum Classic With Cover

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Ethereum Classic Documentation, Release 0.1 Ethereum Alarm Clock • Author: Piper Merriam • Website: alarm_main_website. • Documentation: alarm_documentation. A marketplace that facilitates scheduling transactions to occur at a later time. Serves a similar role to things like crontab in unix, or setTimeout in javascript. • Decentralized cron service in Ethereum proposal - by Peter Szilagyi Ethereum Computation Market • Author: Piper Merriam • Website: computation_market_main_website. • Documentation: computation_market_documentation. A marketplace that facilitates verifiable execution of computations off-chain. Allows for very expernsive computations to be used within the EVM without having to actually pay the high gas costs of executing them on-chain. BTCRelay BTCrelay • More information (about ETH/BTC 2-way peg without modifying bitcoin code). • BTCrelay audit RANDAO Random number * https://www.reddit.com/r/ethereum/comments/49yld7/eli5_how_does_a_service_like_szabodice_grab_a/ The EVM The Ethereum Virtual Machine (EVM) is the runtime environment for smart contracts in Ethereum. It is not only sandboxed, but actually completely isolated, which means that code running inside the EVM has no access to network, filesystem, or other processes. Smart contracts even have limited access to other smart contracts. Contracts live on the blockchain in an Ethereum-specific binary format (EVM bytecode). However, contracts are typically written in an Ethereum high level language, compiled into byte code using an EVM compiler, and finally uploaded on the blockchain using an Ethereum client. 1.7.7 Ethereum Tests Common tests for all clients to test against. The git repo updated regulary with new tests. This section describes basic test concepts and templates which are created by cpp-client. Using Testeth Ethereum cpp-client testeth tool for creation and execution of ethereum tests. To run tests you should open folder (see also Installing and building) 1.7. Contracts and Transactions 99
Ethereum Classic Documentation, Release 0.1 /build/libethereum/test and execute a command ./testeth This will run all test cases automatically. To run a specific test case you could use parameter -t in the command line option: ./testeth -t / Or just the test suite: ./testeth -t You could also use --filltests option to rerun test creation from .json files which are located at ../cpp-ethereum/test/.json ./testeth -t / --filltests By default using --filltests option testeth recreate tests to the ETHEREUM_TEST_PATH folder. You might want to set this variable globally on your system like: nano /etc/environment ETHEREUM_TEST_PATH="/home/user/ethereum/tests" Filler files are test templates which are used to fill initial parameters defined at test specification Ethereum Tests and then create a complete test .json file. You might find filler files very useful when creating your own tests. The --checkstate option adds a BOOST error if the post state of filled test differs from it’s expected section. To specify a concrete test in a TEST_CASE file for filling/running procedure use --singletest option: ./testeth -t / --singletest If you want to debug (note: testeth should be build with VMTRACE=1) a single test within a result test .json file, you might use the following command: ./testeth --log_level=test_suite --run_test=/ --singletest .json --vmtrace --verbosity 12 or ./testeth -t / --singletest --vmtrace --verbosity 12 Some tests may use excessive resources when running, so by default they are disabled. Such tests require specific flag to be set in order to be executed. Like --performance, --inputLimits, --memory, --quadratic. You may also enable all of the tests by setting --all flag. Be careful. Enabled memory tests may stress your system to use 4GB of RAM and more. That’s it for test execution. To read more about command line options you may run testeth with --help option. Now let’s see what test cases are available. Test Cases Almost each test case has it’s filler file available at /webthree-umbrella/libethereum/test 100 Chapter 1. Contents
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