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tendermint
Advanced tools
A light client for Tendermint blockchains which works in Node.js and browsers.
Supports Tendermint v0.33.
npm install tendermint
Light Node
Requests data over RPC and verifies blockchain headers
let Tendermint = require('tendermint')
// some full node's RPC port
let peer = 'ws://localhost:46657'
// `state` contains a part of the chain we know to be valid. If it's
// too old, we cannot safely verify the chain and need to get a newer
// state out-of-band.
let state = {
// a header, in the same format as returned by RPC
// (see http://localhost:46657/commit, under `"header":`)
header: { ... },
// the valdiator set for this header, in the same format as returned by RPC
// (see http://localhost:46657/validators)
validators: [ ... ],
// the commit (validator signatures) for this header, in the same format as
// returned by RPC (see http://localhost:46657/commit, under `"commit":`)
commit: { ... }
}
// options
let opts = {
// the maximum age of a state to be safely accepted,
// e.g. the unbonding period
// (in seconds)
maxAge: 1728000 // defaults to 30 days
}
// instantiate client. will automatically start syncing to the latest state of
// the blockchain
let node = Tendermint(peer, state, opts)
// make sure to handle errors
node.on('error', (err) => { ... })
// emitted once we have caught up to the current chain tip
node.on('synced', () => { ... })
// emitted every time we have verified a new part of the blockchain
node.on('update', () => { ... })
// returns the height of the most recent header we have verified
node.height()
// returns the state object ({ header, validators, commit }) of the most recently
// verified header, should be stored and used to instantiate the light client
// the next time the user runs the app
node.state()
RPC Client
Simple client to make RPC requests to nodes
let { RpcClient } = require('tendermint')
let client = RpcClient('ws://localhost:46657')
// request a block
client.block({ height: 100 })
.then((res) => console.log(res))
The following RPC methods are available:
- subscribe
- unsubscribe
- status
- netInfo
- dialSeeds
- blockchain
- genesis
- block
- validators
- dumpConsensusState
- broadcastTxCommit
- broadcastTxAsync
- broadcastTxSync
- unconfirmedTxs
- numUnconfirmedTxs
- abciQuery
- abciInfo
- abciProof
- unsafeFlushMempool
- unsafeSetConfig
- unsafeStartCpuProfiler
- unsafeStopCpuProfiler
- unsafeWriteHeapProfile
FAQs
A light client which talks to your Tendermint node over RPC
The npm package tendermint receives a total of 253 weekly downloads. As such, tendermint popularity was classified as not popular.
We found that tendermint demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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