How to build and run ==================== Build instructions ------------------ To compile Tezos, you need an OCaml compiler (version 4.06.1) and all the libraries listed in the various ``tezos-*.opam`` files. The best way to install all dependencies is by first installing `OPAM `__, the OCaml package manager. Then, you need to create a new switch alias for Tezos. A switch is your own version of the OPAM configuration, including the OCaml compiler, all packages, and package manager configuration related to your project. This is necessary so that the project doesn’t conflict with other OCaml projects or other versions of Tezos. :: opam update opam switch "tezos" --alias-of 4.06.1 Note that if you previously created a switch named ``tezos`` but with an older OCaml version you need to remove the switch with ``opam switch remove "tezos"``. When the switch is ready, you need to activate it: :: eval `opam config env` Install the libraries which Tezos depends on: :: make build-deps While building the dependencies, ``opam`` is able to handle correctly the OCaml libraries but it is not always able to handle all external C libraries we depend on. On most system, it is able to suggest a call to the system package manager but it currently does not handle version check. At last, compile the project: :: make This should produce three binaries: - ``tezos-node``: the tezos daemon itself; - ``tezos-client``: a minimal command-line client; - ``tezos-protocol-compiler``: a protocol compiler used for developing new version of the economic protocol. Currently Tezos is being developed for Linux only. It should work on mac OS, but it has not been tested recently. A Windows port is in progress. Note that, when executing ``make build-deps``, OPAM will detect if required system dependencies are installed. However, it is not able to detect which versions you actually have. If after a ``git pull``, the build fails (either at ``make build-deps`` or ``make``), you might try to clean up a little bit the opam internal state with the following commands: :: opam update opam pin list -s | xargs opam pin remove make build-deps make Running the node ---------------- So far there is no official Tezos network being run, but you might run a local test network (the development team is running its own testnet, if you’re interested in joining this network, please make a request on our slack channel. We have limited support abilities at the moment but we’ll try to help you best we can). Use the following command to run a node that will accept incoming connections: :: ./tezos-node identity generate 24. This will first generate a new node identity and compute the associated stamp of proof-of-work. Then, the node will listen to connections coming in on ``[::]:9732``. All used data is stored at ``$HOME/.tezos-node/``. For example, the default configuration file is at ``$HOME/.tezos-node/config.json``. To run multiple nodes on the same machine, you can duplicate and edit ``$HOME/.tezos-node/config.json`` while making sure they don’t share paths to the database or any other data file (cf. options ``db.store`` ; ``db.context`` ; ``db.protocol``, ``net.peers-metadata`` and ``net.identity``). You could also let Tezos generate a config file by specifying options on the command line. For instance, if ``$dir/config.json`` does not exist, the following command will generate it and replace the default values with the values from the command line: :: ./tezos-node run --data-dir "$dir" --net-addr localhost:9733 The Tezos server has a built-in mechanism to discover peers on the local network (using UDP packets broadcasted on port 7732). If this mechanism is not sufficient, one can provide Tezos with a list of initial peers, either by editing the option ``net.bootstrap-peers`` in the ``config.json`` file, or by specifying a command line parameter: :: ./tezos-node run \ --data-dir "$dir" --net-addr localhost:2023 \ --peer localhost:2021 --peer localhost:2022 If ``"$dir"/config.json`` exists, the command line options override those read in the config file. By default, Tezos won’t modify the content of an existing ``"$dir"/config.json`` file. But, you may explicit ask the node to reset or to update the file according to the command line parameters with the following commands line: :: ./tezos-node config reset --data-dir "$dir" --net-addr localhost:9733 ./tezos-node config update --data-dir "$dir" --net-addr localhost:9734 Running the node in a sandbox ----------------------------- To run a ‘localhost-only’ instance of a Tezos network, we provide two helper scripts: - ``./src/bin_node/tezos-sandboxed-node.sh`` - ``./src/bin_client/tezos-init-sandboxed-client.sh`` For instance, if you want to run local network with two nodes, in a first terminal, the following command will initialize a node listening for peers on port ``19731`` and listening for RPC on port ``18731``. :: ./src/bin_node/tezos-sandboxed-node.sh 1 This node will store its data in a temporary directory which will be removed when the node is killed. To launch the second node, just run the following command, it will listen on port ``19739`` and ``18739``: :: ./src/bin_node/tezos-sandboxed-node.sh 9 You might replace ``1`` or ``9`` by any number in between if you want to run more than two nodes. But, if you intend to run a single node network, you might remove the spurious “Too few connections” warnings by lowering the number of expected connection, by running the following command instead: :: ./src/bin_node/tezos-sandboxed-node.sh 1 --connections 0 Once your node(s) is/are running, open a new terminal and initialize the “sandboxed” client data: :: eval `./src/bin_client/tezos-init-sandboxed-client.sh 1` It will initialize the client data in a temporary directory. It will also defines in the current shell session an alias ``tezos-client`` preconfigured for communicating the same-numbered node. For instance: :: $ tezos-client rpc call blocks/head/hash { "hash": "BLockGenesisGenesisGenesisGenesisGenesisGeneskvg68z" } When you bootstrap a new network, the network is initialized with a dummy economic protocol, called “genesis”. If you want to run the same protocol than the alphanet, ``init-sandboxed-client`` also defines an alias ``tezos-activate-alpha``, that you need to execute once for activating the whole network. For instance: :: $ tezos-client rpc call blocks/head/protocol { "protocol": "ProtoGenesisGenesisGenesisGenesisGenesisGenesk612im" } $ tezos-activate-alpha Injected BMBcK869jaHQDc $ tezos-client rpc call blocks/head/protocol { "protocol": "ProtoALphaALphaALphaALphaALphaALphaALphaALphaDdp3zK" } Configuration options --------------------- Here is an example configuration file with all parameters specified. Most of the time it uses default values, except for cases where the default is not explanatory enough (i.e. “bootstrap-peers” is an empty list by default). Comments are not allowed in JSON, so this configuration file would not parse. They are just provided here to help writing your own configuration file if needed. :: { /* Location of the data dir on disk. */ "data-dir": "/home/tezos/my_data_dir" /* Configuration of net parameters */ "net": { /* Floating point number between 0 and 256 that represents a difficulty, 24 signifies for example that at least 24 leading zeroes are expected in the hash. */ "expected-proof-of-work": 24.5, /* List of hosts. Tezos can connect to both IPv6 and IPv4 hosts. If the port is not specified, default port 9732 will be assumed. */ "bootstrap-peers": ["::1:10732", "::ffff:192.168.1.3:9733", "mynode.tezos.com"], /* Specify if the network is closed or not. A closed network allows only peers listed in "bootstrap-peers". */ "closed": false, /* Network limits */ "limits": { /* Delay granted to a peer to perform authentication, in seconds. */ "authentication-timeout": 5, /* Strict minimum number of connections (triggers an urgent maintenance). */ "min-connections": 50, /* Targeted number of connections to reach when bootstraping / maintaining. */ "expected-connections": 100, /* Maximum number of connections (exceeding peers are disconnected). */ "max-connections": 200, /* Number above which pending incoming connections are immediately rejected. */ "backlog": 20, /* Maximum allowed number of incoming connections that are pending authentication. */ "max-incoming-connections": 20, /* Max download and upload speeds in KiB/s. */ "max-download-speed": 1024, "max-upload-speed": 1024, /* Size of the buffer passed to read(2). */ "read-buffer-size": 16384, } }, /* Configuration of rpc parameters */ "rpc": { /* Host to listen to. If the port is not specified, the default port 8732 will be assumed. */ "listen-addr": "localhost:8733", /* Cross Origin Resource Sharing parameters, see https://en.wikipedia.org/wiki/Cross-origin_resource_sharing. */ "cors-origin": [], "cors-headers": [], /* Certificate and key files (necessary when TLS is used). */ "crt": "tezos-node.crt", "key": "tezos-node.key" }, /* Configuration of log parameters */ "log": { /* Output for the logging function. Either "stdout", "stderr" or the name of a log file . */ "output": "tezos-node.log", /* Verbosity level: one of 'fatal', 'error', 'warn', 'notice', 'info', 'debug'. */ "level": "info", /* Fine-grained logging instructions. Same format as described in `tezos-node run --help`, DEBUG section. In the example below, sections "net" and all sections starting by "client" will have their messages logged up to the debug level, whereas the rest of log sections will be logged up to the notice level. */ "rules": "client* -> debug, net -> debug, * -> notice", /* Format for the log file, see http://ocsigen.org/lwt/dev/api/Lwt_log_core#2_Logtemplates. */ "template": "$(date) - $(section): $(message)" }, /* Configuration for the validator and mempool parameters */ "shell": { /* The number of peers to synchronize with before declaring the node 'bootstrapped'. */ "bootstrap_threshold": 4 } } Debugging --------- It is possible to set independent log levels for different logging sections in Tezos, as well as specifying an output file for logging. See the description of log parameters above as well as documentation under the DEBUG section displayed by \`tezos-node run –help’. JSON/RPC interface ------------------ The Tezos node provides a JSON/RPC interface. Note that it is an RPC, and it is JSON based, but it does not follow the “JSON-RPC” protocol. It is not active by default and it must be explicitly activated with the ``--rpc-addr`` option. Typically, if you are not trying to run a local network and just want to explore the RPC, you would run: :: ./tezos-node run --rpc-addr localhost The RPC interface is self-documented and the ``tezos-client`` executable is able to pretty-print the RPC API. For instance, to see the API provided by the Tezos Shell: :: ./tezos-client rpc list To get API attached to the “genesis” block, including the remote procedures provided by the associated economic protocol version: :: ./tezos-client rpc list /blocks/genesis/ You might also want the JSON schema describing the expected input and output of a RPC. For instance: :: ./tezos-client rpc schema /blocks/genesis/hash Note: you can get the same information, but as a raw JSON object, with a simple HTTP request: :: wget --post-data '{ "recursive": true }' -O - http://localhost:8732/describe wget --post-data '{ "recursive": true }' -O - http://localhost:8732/describe/blocks/genesis wget -O - http://localhost:8732/describe/blocks/genesis/hash The minimal CLI client ---------------------- Tezos is distributed with two command line tools: a minimal command line wallet ``tezos-client``, and an administration tool ``tezos-admin-client``. Their command line interfaces are described :ref:`here` and :ref:`here`.