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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
}
}