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README.md
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README.md
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# Gajumaru Hive Client
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When running tests locally:
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This application is primarily meant to be used by the [GajuMine](https://git.qpq.swiss/QPQ-AG/gajumine)
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application, but can also be run as a headless worker. It can be built either using `rebar3` or
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using [`zx`](https://zxq9.com/projects/zomp/) (recomended).
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`rebar3 shell`
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## Operation
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The `gmhive_client` needs at least a worker public key to operate.
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It first queries the [GajuMining website](https://gajumining.com) to find the address of
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the Gajumaru Hive server, which it then connects to. GajuMining won't provide the address
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unless the public key is a registered worker.
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If connecting to the `testnet` hive:
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`GMMP_CLIENT_CONFIG=gmhc_config-testnet.eterm rebar3 shell`
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## Configuration
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If connecting to a `testnet` hive running locally:
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`GMHC_CONFIG=gmhc_config-testnet-local.eterm rebar3 shell`
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The Hive Client uses a configuration schema ([see below](#json-schema)).
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At a minimum, a value for `"pubkey"` must be provided. All other configuration
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items have usable defaults.
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Examples:
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**.json**:
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```json
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{ "pubkey" : "ak_2NQoybA6uyvhu3cdzWFtZnxCZpZvKE5TxjYB3hB7kMWEquwLVY",
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"extra_pubkeys" : [ "ak_2Dfwyb7ZFhcAELoxgWyMCkVnpZUhwUm6aftKcv6dakagePWyx9" ]
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}
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```
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**.eterm**:
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```erlang
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#{ <<"pubkey">> => <<"ak_2NQoybA6uyvhu3cdzWFtZnxCZpZvKE5TxjYB3hB7kMWEquwLVY">>,
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<<"extra_pubkeys">> : [ <<"ak_2Dfwyb7ZFhcAELoxgWyMCkVnpZUhwUm6aftKcv6dakagePWyx9">> ]
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}.
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```
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Configuration can be provided in a file, where the filename extension defines
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the format: `".json"` for JSON format, `".eterm"` for Erlang term format.
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In the case of Erlang term format, the data should be on "internal JSON form",
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i.e. nested maps, where all strings are of type `binary()`.
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By default, the Hive client looks for a configuration file named
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`"gmhive_client_config.[json|eterm]"` in the current working directory.
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A specific configuration file can be identified using the OS environment
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variable `GMHIVE_CLIENT_CONFIG`.
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On invocation, individual configuration items can be set in one of two ways:
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### OS environment variable overrides
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By creating an OS environment variable with the name `GMHC__<variable_name>`,
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an individual variable can be redefined. The name is composed from the
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configuration key name, converted to uppercase, and with `__` as a delimiter
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for a nested key. The value is coerced into the expected type using the schema.
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Complex values are given in JSON format - be sure to quote it.
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Example:
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```
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GMHC__PUBKEY="ak_2Dfwyb7ZFhcAELoxgWyMCkVnpZUhwUm6aftKcv6dakagePWyx9" zx run uwiger-gmhive_client
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```
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```
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GMHC__WORKERS='[{"executable": "mean29-avx2"}]' zx run ...
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```
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### Command-line arguments
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Arguments on the form `-gmhc Key Value` can be added to the command line.
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The key name is derived from the schema, all lowercase and with `__` as delimiter.
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Example:
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```
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zx run uwiger-gmhive_client -gmhc pubkey ak_2Dfwyb...
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```
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### Considerations
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The values for `pool_admin` and `pool` should be left alone. The `"network"`
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configuration item is special. Its default value is `"mainnet"`, which
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indicates that the client should connect to
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[gajumining.com](https://gajumining.com) to find the hive server, but by
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changing its value to `"testnet"`, (or to other networks in the future,) not
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only does this inform the client of the network for which the client should
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mine, but it also changes what URL the client will use to find the hive
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server. (For `"testnet"` this will be `"test.gajumining.com"`.)
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## JSON Schema
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```json
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{
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"$schema": "http://json-schema.org/draft-04/schema#",
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"additionalProperties": false,
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"properties": {
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"extra_pubkeys": {
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"default": [],
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"description": "Additional worker pubkeys, sharing rewards",
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"items": {
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"pattern": "^ak_[1-9A-HJ-NP-Za-km-z]*$",
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"type": "string"
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},
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"type": "array"
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},
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"network": {
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"default": "mainnet",
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"type": "string"
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},
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"pool": {
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"additionalProperties": false,
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"properties": {
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"host": {
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"default": "127.0.0.1",
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"description": "Hostname of hive server",
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"example": "0.0.0.0",
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"type": "string"
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},
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"id": {
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"description": "Pool contract id",
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"pattern": "^ct_[1-9A-HJ-NP-Za-km-z]*$",
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"type": "string"
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},
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"port": {
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"default": 17888,
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"description": "Hive server listen port",
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"minimum": 1,
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"type": "integer"
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}
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},
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"type": "object"
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},
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"pool_admin": {
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"additionalProperties": false,
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"properties": {
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"default_per_network": {
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"additionalProperties": false,
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"properties": {
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"mainnet": {
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"default": "https://gajumining.com/api/workers/{CLIENT_ID}",
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"type": "string"
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},
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"testnet": {
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"default": "https://test.gajumining.com/api/workers/{CLIENT_ID}",
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"type": "string"
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}
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},
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"type": "object"
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},
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"url": {
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"default": "https://test.gajumining.com/api/workers/{CLIENT_ID}",
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"description": "URL of Eureka worker api",
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"type": "string"
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}
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},
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"type": "object"
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},
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"pubkey": {
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"description": "Primary client pubkey",
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"pattern": "^ak_[1-9A-HJ-NP-Za-km-z]*$",
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"type": "string"
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},
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"type": {
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"default": "worker",
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"description": "monitor mode can be used to see if a pool is alive",
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"enum": [
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"worker",
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"monitor"
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],
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"type": "string"
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},
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"workers": {
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"default": [
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{ "executable": "mean29-generic" }
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],
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"description": "Definitions of workers' configurations. If no worker are configured one worker is used as default, i.e. 'mean29-generic' executable without any extra args.",
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"items": {
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"additionalProperties": false,
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"properties": {
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"executable": {
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"default": "mean29-generic",
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"description": "Executable binary of the worker. Can be a fully qualified path, but the software may apply default logic to locate a plain basename.",
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"type": "string"
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},
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"extra_args": {
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"default": "",
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"description": "Extra arguments to pass to the worker executable binary. The safest choice is specifying no arguments i.e. empty string.",
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"type": "string"
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},
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"hex_encoded_header": {
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"default": false,
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"description": "Hexadecimal encode the header argument that is send to the worker executable. CUDA executables expect hex encoded header.",
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"type": "boolean"
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},
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"instances": {
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"description": "Instances used by the worker in case of Multi-GPU mining. Numbers on the configuration list represent GPU devices that are to be addressed by the worker.",
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"example": [0,1,2,3],
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"items": { "type": "integer" },
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"minItems": 1,
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"type": "array"
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},
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"repeats": {
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"default": 1,
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"description": "Number of tries to do in each worker context - WARNING: it should be set so the worker process runs for 3-5s or else the node risk missing out on new micro blocks.",
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"type": "integer"
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}
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},
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"required": [
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"executable"
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],
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"type": "object"
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},
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"type": "array"
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}
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},
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"type": "object"
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}
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```
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