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

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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"