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Admin API

This API can be used for measuring node health and debugging. Note that the Admin API is disabled by default for security reasons. To run a node with the Admin API enabled, use config flag --api-admin-enabled=true.

Format​

This API uses the json 2.0 RPC format. For details, see here.

Endpoint​

/ext/admin

API Methods​

admin.alias​

Assign an API endpoint an alias, a different endpoint for the API. The original endpoint will still work. This change only affects this node; other nodes will not know about this alias.

Signature​

admin.alias({endpoint:string, alias:string}) -> {success:bool}
  • endpoint is the original endpoint of the API. endpoint should only include the part of the endpoint after /ext/.
  • The API being aliased can now be called at ext/alias.
  • alias can be at most 512 characters.

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.alias",
    "params": {
        "alias":"myAlias",
        "endpoint":"bc/X"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}

Now, calls to the X-Chain can be made to either /ext/bc/X or, equivalently, to /ext/myAlias.

admin.aliasChain​

Give a blockchain an alias, a different name that can be used any place the blockchain’s ID is used.

Signature​

admin.aliasChain(
    {
        chain:string,
        alias:string
    }
) -> {success:bool}
  • chain is the blockchain’s ID.
  • alias can now be used in place of the blockchain’s ID (in API endpoints, for example.)

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.aliasChain",
    "params": {
        "chain":"sV6o671RtkGBcno1FiaDbVcFv2sG5aVXMZYzKdP4VQAWmJQnM",
        "alias":"myBlockchainAlias"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}

Now, instead of interacting with the blockchain whose ID is sV6o671RtkGBcno1FiaDbVcFv2sG5aVXMZYzKdP4VQAWmJQnM by making API calls to /ext/bc/sV6o671RtkGBcno1FiaDbVcFv2sG5aVXMZYzKdP4VQAWmJQnM, one can also make calls to ext/bc/myBlockchainAlias.

admin.getChainAliases​

Returns the aliases of the chain

Signature​

admin.getChainAliases(
    {
        chain:string
    }
) -> {aliases:string[]}
  • chain is the blockchain’s ID.

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.getChainAliases",
    "params": {
        "chain":"sV6o671RtkGBcno1FiaDbVcFv2sG5aVXMZYzKdP4VQAWmJQnM"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc": "2.0",
    "result": {
        "aliases": [
            "X",
            "avm",
            "2eNy1mUFdmaxXNj1eQHUe7Np4gju9sJsEtWQ4MX3ToiNKuADed"
        ]
    },
    "id": 1
}

admin.getLoggerLevel​

Returns log and display levels of loggers.

Signature​

admin.getLoggerLevel(
    {
        loggerName:string // optional
    }
) -> {
        loggerLevels: {
            loggerName: {
                    logLevel: string,
                    displayLevel: string
            }
        }
    }
  • loggerName is the name of the logger to be returned. This is an optional argument. If not specified, it returns all possible loggers.

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.getLoggerLevel",
    "params": {
        "loggerName": "C"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc": "2.0",
    "result": {
        "loggerLevels": {
            "C": {
                "logLevel": "DEBUG",
                "displayLevel": "INFO"
            }
        }
    },
    "id": 1
}

admin.loadVMs​

Dynamically loads any virtual machines installed on the node as plugins. See here for more information on how to install a virtual machine on a node.

Signature​

admin.loadVMs() -> {
    newVMs: map[string][]string
    failedVMs: map[string]string,
}
  • failedVMs is only included in the response if at least one virtual machine fails to be loaded.

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.loadVMs",
    "params" :{}
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
  "jsonrpc": "2.0",
  "result": {
    "newVMs": {
      "tGas3T58KzdjLHhBDMnH2TvrddhqTji5iZAMZ3RXs2NLpSnhH": ["foovm"]
    },
    "failedVMs": {
      "rXJsCSEYXg2TehWxCEEGj6JU2PWKTkd6cBdNLjoe2SpsKD9cy": "error message"
    }
  },
  "id": 1
}

admin.lockProfile​

Writes a profile of mutex statistics to lock.profile.

Signature​

admin.lockProfile() -> {success:bool}

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.lockProfile",
    "params" :{}
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}

admin.memoryProfile​

Writes a memory profile of the to mem.profile.

Signature​

admin.memoryProfile() -> {success:bool}

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.memoryProfile",
    "params" :{}
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}

admin.setLoggerLevel​

Sets log and display levels of loggers.

Signature​

admin.setLoggerLevel(
    {
        loggerName: string, // optional
        logLevel: string, // optional
        displayLevel: string, // optional
    }
) -> {success:bool}
  • loggerName is the logger's name to be changed. This is an optional parameter. If not specified, it changes all possible loggers.
  • logLevel is the log level of written logs, can be omitted.
  • displayLevel is the log level of displayed logs, can be omitted.

logLevel and displayLevel cannot be omited at the same time.

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.setLoggerLevel",
    "params": {
        "loggerName": "C",
        "logLevel": "DEBUG",
        "displayLevel": "INFO"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}

admin.startCPUProfiler​

Start profiling the CPU utilization of the node. To stop, call admin.stopCPUProfiler. On stop, writes the profile to cpu.profile.

Signature​

admin.startCPUProfiler() -> {success:bool}

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.startCPUProfiler",
    "params" :{}
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}

admin.stopCPUProfiler​

Stop the CPU profile that was previously started.

Signature​

admin.stopCPUProfiler() -> {success:bool}

Example Call​

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"admin.stopCPUProfiler"
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/admin

Example Response​

{
    "jsonrpc":"2.0",
    "id"     :1,
    "result" :{
        "success":true
    }
}