go-ethereum/docs/interacting-with-geth/rpc/ns-les.md

title	description
les Namespace	Documentation for the JSON-RPC API "les" namespace

The les API is for managing LES server settings, including client parameters and payment settings for prioritized clients. It also provides functions to query checkpoint information in both server and client mode.

les_serverInfo

Get information about currently connected and total/individual allowed connection capacity.

Client	Method invocation
Go	les.ServerInfo() map[string]interface{}
Console	les.serverInfo()
RPC	{"method": "les_serverInfo", "params": []}

Example:

> les.serverInfo
{
  freeClientCapacity: 16000,
  maximumCapacity: 1600000,
  minimumCapacity: 16000,
  priorityConnectedCapacity: 180000,
  totalCapacity: 1600000,
  totalConnectedCapacity: 180000
}

les_clientInfo

Get individual client information (connection, balance, pricing) on the specified list of clients or for all connected clients if the ID list is empty.

Client	Method invocation
Go	les.ClientInfo(ids []enode.ID) map[enode.ID]map[string]interface{}
Console	les.clientInfo([id, ...])
RPC	{"method": "les_clientInfo", "params": [[id, ...]]}

Example:

> les.clientInfo([])
{
  37078bf8ea160a2b3d129bb4f3a930ce002356f83b820f467a07c1fe291531ea: {
    capacity: 16000,
    connectionTime: 11225.335901136,
    isConnected: true,
    pricing/balance: 998266395881,
    pricing/balanceMeta: "",
    pricing/negBalance: 501657912857,
    priority: true
  },
  6a47fe7bb23fd335df52ef1690f37ab44265a537b1d18eb616a3e77f898d9e77: {
    capacity: 100000,
    connectionTime: 9874.839293082,
    isConnected: true,
    pricing/balance: 2908840710198,
    pricing/balanceMeta: "qwerty",
    pricing/negBalance: 206242704507,
    priority: true
  },
  740c78f7d914e5c763731bc751b513fc2388ffa0b47db080ded3e8b305e68c75: {
    capacity: 16000,
    connectionTime: 3089.286712188,
    isConnected: true,
    pricing/balance: 998266400174,
    pricing/balanceMeta: "",
    pricing/negBalance: 55135348863,
    priority: true
  },
  9985ade55b515f79f64274bf2ae440ca8c433cfb0f283fb6010bf46f796b2a3b: {
    capacity: 16000,
    connectionTime: 11479.335479545,
    isConnected: true,
    pricing/balance: 998266452203,
    pricing/balanceMeta: "",
    pricing/negBalance: 564116425655,
    priority: true
  },
  ce65ada2c3e17d6da00cec0b3cc4c8ed5e74428b60f42fa287eaaec8cca62544: {
    capacity: 16000,
    connectionTime: 7095.794385419,
    isConnected: true,
    pricing/balance: 998266448492,
    pricing/balanceMeta: "",
    pricing/negBalance: 214617753229,
    priority: true
  },
  e1495ceb6db842f3ee66428d4bb7f4a124b2b17111dae35d141c3d568b869ef1: {
    capacity: 16000,
    connectionTime: 8614.018237937,
    isConnected: true,
    pricing/balance: 998266391796,
    pricing/balanceMeta: "",
    pricing/negBalance: 185964891797,
    priority: true
  }
}

les_priorityClientInfo

Get individual client information on clients with a positive balance in the specified ID range, start included, stop excluded. If stop is zero then results are returned until the last existing balance entry. maxCount limits the number of returned results. If the count limit is reached but there are more IDs in the range then the first missing ID is included in the result with an empty value assigned to it.

Client	Method invocation
Go	les.PriorityClientInfo(start, stop enode.ID, maxCount int) map[enode.ID]map[string]interface{}
Console	les.priorityClientInfo(id, id, number)
RPC	{"method": "les_priorityClientInfo", "params": [id, id, number]}

Example:

> les.priorityClientInfo("0x0000000000000000000000000000000000000000000000000000000000000000", "0x0000000000000000000000000000000000000000000000000000000000000000", 100)
{
  37078bf8ea160a2b3d129bb4f3a930ce002356f83b820f467a07c1fe291531ea: {
    capacity: 16000,
    connectionTime: 11128.247204027,
    isConnected: true,
    pricing/balance: 999819815030,
    pricing/balanceMeta: "",
    pricing/negBalance: 501657912857,
    priority: true
  },
  6a47fe7bb23fd335df52ef1690f37ab44265a537b1d18eb616a3e77f898d9e77: {
    capacity: 100000,
    connectionTime: 9777.750592047,
    isConnected: true,
    pricing/balance: 2918549830576,
    pricing/balanceMeta: "qwerty",
    pricing/negBalance: 206242704507,
    priority: true
  },
  740c78f7d914e5c763731bc751b513fc2388ffa0b47db080ded3e8b305e68c75: {
    capacity: 16000,
    connectionTime: 2992.198001116,
    isConnected: true,
    pricing/balance: 999819845102,
    pricing/balanceMeta: "",
    pricing/negBalance: 55135348863,
    priority: true
  },
  9985ade55b515f79f64274bf2ae440ca8c433cfb0f283fb6010bf46f796b2a3b: {
    capacity: 16000,
    connectionTime: 11382.246766963,
    isConnected: true,
    pricing/balance: 999819871598,
    pricing/balanceMeta: "",
    pricing/negBalance: 564116425655,
    priority: true
  },
  ce65ada2c3e17d6da00cec0b3cc4c8ed5e74428b60f42fa287eaaec8cca62544: {
    capacity: 16000,
    connectionTime: 6998.705683407,
    isConnected: true,
    pricing/balance: 999819882177,
    pricing/balanceMeta: "",
    pricing/negBalance: 214617753229,
    priority: true
  },
  e1495ceb6db842f3ee66428d4bb7f4a124b2b17111dae35d141c3d568b869ef1: {
    capacity: 16000,
    connectionTime: 8516.929533901,
    isConnected: true,
    pricing/balance: 999819891640,
    pricing/balanceMeta: "",
    pricing/negBalance: 185964891797,
    priority: true
  }
}

> les.priorityClientInfo("0x4000000000000000000000000000000000000000000000000000000000000000", "0xe000000000000000000000000000000000000000000000000000000000000000", 2)
{
  6a47fe7bb23fd335df52ef1690f37ab44265a537b1d18eb616a3e77f898d9e77: {
    capacity: 100000,
    connectionTime: 9842.11178361,
    isConnected: true,
    pricing/balance: 2912113588853,
    pricing/balanceMeta: "qwerty",
    pricing/negBalance: 206242704507,
    priority: true
  },
  740c78f7d914e5c763731bc751b513fc2388ffa0b47db080ded3e8b305e68c75: {
    capacity: 16000,
    connectionTime: 3056.559199029,
    isConnected: true,
    pricing/balance: 998790060237,
    pricing/balanceMeta: "",
    pricing/negBalance: 55135348863,
    priority: true
  },
  9985ade55b515f79f64274bf2ae440ca8c433cfb0f283fb6010bf46f796b2a3b: {}
}

les_addBalance

Add signed value to the token balance of the specified client and update its meta tag. The balance cannot go below zero or over 2^^63-1. The balance values before and after the update are returned. The meta tag can be used to store a sequence number or reference to the last processed incoming payment, token expiration info, balance in other currencies or any application-specific additional information.

Client	Method invocation
Go	les.AddBalance(id enode.ID, value int64, meta string) ([2]uint64, error)}
Console	les.addBalance(id, number, string)
RPC	{"method": "les_addBalance", "params": [id, number, string]}

Example:

> les.addBalance("0x6a47fe7bb23fd335df52ef1690f37ab44265a537b1d18eb616a3e77f898d9e77", 1000000000, "qwerty")
[968379616, 1968379616]

les_setClientParams

Set capacity and pricing factors for the specified list of connected clients or for all connected clients if the ID list is empty.

Client	Method invocation
Go	les.SetClientParams(ids []enode.ID, params map[string]interface{}) error
Console	les.setClientParams([id, ...], {string: value, ...})
RPC	{"method": "les_setClientParams", "params": [[id, ...], {string: value, ...}]}

Example:

> les.setClientParams(["0x6a47fe7bb23fd335df52ef1690f37ab44265a537b1d18eb616a3e77f898d9e77"], {
    "capacity": 100000,
    "pricing/timeFactor": 0,
    "pricing/capacityFactor": 1000000000,
    "pricing/requestCostFactor": 1000000000,
    "pricing/negative/timeFactor": 0,
    "pricing/negative/capacityFactor": 1000000000,
    "pricing/negative/requestCostFactor": 1000000000,
})
null

les_setDefaultParams

Set default pricing factors for subsequently connected clients.

Client	Method invocation
Go	les.SetDefaultParams(params map[string]interface{}) error
Console	les.setDefaultParams({string: value, ...})
RPC	{"method": "les_setDefaultParams", "params": [{string: value, ...}]}

Example:

> les.setDefaultParams({
    "pricing/timeFactor": 0,
    "pricing/capacityFactor": 1000000000,
    "pricing/requestCostFactor": 1000000000,
    "pricing/negative/timeFactor": 0,
    "pricing/negative/capacityFactor": 1000000000,
    "pricing/negative/requestCostFactor": 1000000000,
})
null

les_latestCheckpoint

Get the index and hashes of the latest known checkpoint.

Client	Method invocation
Go	les.LatestCheckpoint() ([4]string, error)
Console	les.latestCheckpoint()
RPC	{"method": "les_latestCheckpoint", "params": []}

Example:

> les.latestCheckpoint
["0x110", "0x6eedf8142d06730b391bfcbd32e9bbc369ab0b46ae226287ed5b29505a376164", "0x191bb2265a69c30201a616ae0d65a4ceb5937c2f0c94b125ff55343d707463e5", "0xf58409088a5cb2425350a59d854d546d37b1e7bef8bbf6afee7fd15f943d626a"]

les_getCheckpoint

Get checkpoint hashes by index.

Client	Method invocation
Go	les.GetCheckpoint(index uint64) ([3]string, error)
Console	les.getCheckpoint(number)
RPC	{"method": "les_getCheckpoint", "params": [number]}

Example:

> les.getCheckpoint(256)
["0x93eb4af0b224b1097e09181c2e51536fe0a3bf3bb4d93e9a69cab9eb3e28c75f", "0x0eb055e384cf58bc72ca20ca5e2b37d8d4115dce80ab4a19b72b776502c4dd5b", "0xda6c02f7c51f9ecc3eca71331a7eaad724e5a0f4f906ce9251a2f59e3115dd6a"]

les_getCheckpointContractAddress

Get the address of the checkpoint oracle contract.

Client	Method invocation
Go	les.GetCheckpointContractAddress() (string, error)
Console	les.checkpointContractAddress()
RPC	{"method": "les_getCheckpointContractAddress", "params": []}

Example:

> les.checkpointContractAddress
"0x9a9070028361F7AAbeB3f2F2Dc07F82C4a98A02a"