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Raft RPC API

APIs

raft_cluster

Returns the details of all nodes part of the raft cluster

Parameters

None

Returns

• hostName: DNS name or the host IP address
• nodeActive: true if the node is active in raft cluster else false
• nodeId: enode id of the node
• p2pPort: p2p port
• raftId: raft id of the node
• raftPort: raft port
• role: role of the node in raft quorum. Can be minter/ verifier/ learner. In case there is no leader at network level it will be returned as ""

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_cluster", "id":10}' --header "Content-Type: application/json"

// Response
{"jsonrpc":"2.0","id":10,"result":[{"raftId":1,"nodeId":"ac6b1096ca56b9f6d004b779ae3728bf83f8e22453404cc3cef16a3d9b96608bc67c4b30db88e0a5a6c6390213f7acbe1153ff6d23ce57380104288ae19373ef","p2pPort":21000,"raftPort":50401,"hostname":"127.0.0.1","role":"minter","nodeActive":true},{"raftId":3,"nodeId":"579f786d4e2830bbcc02815a27e8a9bacccc9605df4dc6f20bcc1a6eb391e7225fff7cb83e5b4ecd1f3a94d8b733803f2f66b7e871961e7b029e22c155c3a778","p2pPort":21002,"raftPort":50403,"hostname":"127.0.0.1","role":"verifier","nodeActive":true},{"raftId":2,"nodeId":"0ba6b9f606a43a95edc6247cdb1c1e105145817be7bcafd6b2c0ba15d58145f0dc1a194f70ba73cd6f4cdd6864edc7687f311254c7555cc32e4d45aeb1b80416","p2pPort":21001,"raftPort":50402,"hostname":"127.0.0.1","role":"verifier","nodeActive":true}]}

geth console

> raft.cluster
[{
    hostname: "127.0.0.1",
    nodeActive: true,
    nodeId: "0ba6b9f606a43a95edc6247cdb1c1e105145817be7bcafd6b2c0ba15d58145f0dc1a194f70ba73cd6f4cdd6864edc7687f311254c7555cc32e4d45aeb1b80416",
    p2pPort: 21001,
    raftId: 2,
    raftPort: 50402,
    role: "verifier"
}, {
    hostname: "127.0.0.1",
    nodeActive: true,
    nodeId: "579f786d4e2830bbcc02815a27e8a9bacccc9605df4dc6f20bcc1a6eb391e7225fff7cb83e5b4ecd1f3a94d8b733803f2f66b7e871961e7b029e22c155c3a778",
    p2pPort: 21002,
    raftId: 3,
    raftPort: 50403,
    role: "verifier"
}, {
    hostname: "127.0.0.1",
    nodeActive: true,
    nodeId: "ac6b1096ca56b9f6d004b779ae3728bf83f8e22453404cc3cef16a3d9b96608bc67c4b30db88e0a5a6c6390213f7acbe1153ff6d23ce57380104288ae19373ef",
    p2pPort: 21000,
    raftId: 1,
    raftPort: 50401,
    role: "minter"
}]

raft_role

Returns the role of the current node in raft cluster

Parameters

None

Returns

• result: role of the node in raft cluster. Can be minter/ verifier/ learner. In case there is no leader at network level it will be returned as ""

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_role", "id":10}' --header "Content-Type: application/json"

// Response
{"jsonrpc":"2.0","id":10,"result":"verifier"}

geth console

> raft.role
"minter"

raft_leader

Returns enode id of the leader node

Parameters

None

Returns

• result: enode id of the leader

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_leader", "id":10}' --header "Content-Type: application/json"

// Response
{"jsonrpc":"2.0","id":10,"result":"ac6b1096ca56b9f6d004b779ae3728bf83f8e22453404cc3cef16a3d9b96608bc67c4b30db88e0a5a6c6390213f7acbe1153ff6d23ce57380104288ae19373ef"}

geth console

> raft.leader
"ac6b1096ca56b9f6d004b779ae3728bf83f8e22453404cc3cef16a3d9b96608bc67c4b30db88e0a5a6c6390213f7acbe1153ff6d23ce57380104288ae19373ef"

If there is no leader at the network level, the call to the api will result in the following error:

> raft.leader
Error: no leader is currently elected
    at web3.js:3143:20
    at web3.js:6347:15
    at get (web3.js:6247:38)
    at <unknown>

raft_addPeer

API for adding a new peer to the network.

Parameters

• enodeId: enode id of the node to be added to the network

Returns

• result: raft id for the node being added

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_addPeer","params": ["enode://3701f007bfa4cb26512d7df18e6bbd202e8484a6e11d387af6e482b525fa25542d46ff9c99db87bd419b980c24a086117a397f6d8f88e74351b41693880ea0cb@127.0.0.1:21004?discport=0&raftport=50405"], "id":10}' --header "Content-Type: application/json"

// Response
{"jsonrpc":"2.0","id":10,"result":5}

geth console

> raft.addPeer("enode://3701f007bfa4cb26512d7df18e6bbd202e8484a6e11d387af6e482b525fa25542d46ff9c99db87bd419b980c24a086117a397f6d8f88e74351b41693880ea0cb@127.0.0.1:21004?discport=0&raftport=50405")
5

The new node can join the network with geth option of --raftjoinexisting <<raftId>>

If the node being added is already part of the network the of the network, the following error is thrown:

> raft.addPeer("enode://3701f007bfa4cb26512d7df18e6bbd202e8484a6e11d387af6e482b525fa25542d46ff9c99db87bd419b980c24a086117a397f6d8f88e74351b41693880ea0cb@127.0.0.1:21004?discport=0&raftport=50405")
Error: node with this enode has already been added to the cluster: f06c06f1e958cb2edf90d8bfb912de287f9b047b4228436e94b5b78e3ee16171
    at web3.js:3143:20
    at web3.js:6347:15
    at web3.js:5081:36
    at <anonymous>:1:1

raft_removePeer

API to remove a node from raft cluster

Parameters

• raftId : raft id of the node to be removed from the cluster

Returns

• result: null

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_removePeer","params": [4], "id":10}' --header "Content-Type: application/json"

// Response
{"jsonrpc":"2.0","id":10,"result":null}

geth console

> raft.removePeer(4)
null

raft_addLearner

API to add a new node to the network as a learner node. The learner node syncs with network and can transact but will not be part of raft quorum and hence will not provide block confirmation to minter node.

Parameters

• enodeId

Returns

• result: raft id for the node being added

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_addLearner","params": ["enode://3701f007bfa4cb26512d7df18e6bbd202e8484a6e11d387af6e482b525fa25542d46ff9c99db87bd419b980c24a086117a397f6d8f88e74351b41693880ea0cb@127.0.0.1:21004?discport=0&raftport=50405"], "id":10}' --header "Content-Type: application/json"

// Response
{"jsonrpc":"2.0","id":10,"result":5}

geth console

> raft.addLearner("enode://3701f007bfa4cb26512d7df18e6bbd202e8484a6e11d387af6e482b525fa25542d46ff9c99db87bd419b980c24a086117a397f6d8f88e74351b41693880ea0cb@127.0.0.1:21004?discport=0&raftport=50405")
5

raft_promoteToPeer

API for promoting a learner node to peer and thus be part of the raft quorum.

Parameters

• raftId: raft id of the node to be promoted

Returns

• result: true or false

Examples

JSON RPC

// Request
curl -X POST http://127.0.0.1:22001 --data '{"jsonrpc":"2.0","method":"raft_promoteToPeer","params": [4], "id":10}' --header "Content-Type: application/json"

// Response
{// Response
 {"jsonrpc":"2.0","id":10,"result":true}

geth console

> raft.promoteToPeer(4)
true