Evmos TS Wallet

Evmos ts/js wallet to sign and broadcast messages created with evmosjs

Usage

yarn add @hanchon/evmos-ts-wallet

Some constants are exported as helpers but the values may not be updated for the current state of the network:

• MAINNET_FEE
• TESTNET_FEE
• LOCALNET_FEE
• MAINNET_CHAIN
• TESTNET_CHAIN
• LOCALNET_CHAIN

Configuration

The constants for fee and chain should be updated by the user to follow the network upgrade and the fee changes, I'll try to keep it up to date, but probably you want to control this values in your code.

Both getSender and brodcast should set the option parameter called url, this should be pointing to the port 1317 of your node or a public rest endpoint. By default is using localhost:1317.

Both signing functions have the optional parameter broadcastMode that by default is BROADCAST_MODE_BLOCK.

Example using keplr signature

import { Wallet } from '@ethersproject/wallet'
import { createMessageSend } from '@tharsis/transactions'
import {
  broadcast,
  getSender,
  LOCALNET_CHAIN,
  LOCALNET_FEE,
  signTransaction,
} from '@hanchon/evmos-ts-wallet'
;(async () => {
  const privateMnemonic =
    'pluck view carry maid bamboo river major where dutch wood certain oval order wise awkward clerk adult summer because number raven coil crunch hat'
  const wallet = Wallet.fromMnemonic(privateMnemonic)

  const sender = await getSender(wallet)
  const txSimple = createMessageSend(LOCALNET_CHAIN, sender, LOCALNET_FEE, '', {
    destinationAddress: 'evmos1pmk2r32ssqwps42y3c9d4clqlca403yd9wymgr',
    amount: '1',
    denom: 'aevmos',
  })

  const resKeplr = await signTransaction(wallet, txSimple)
  const broadcastRes = await broadcast(resKeplr)
  if (broadcastRes.tx_response.code === 0) {
    console.log('Success')
  } else {
    console.log('Error')
  }
})()

Example using eip712

import { Wallet } from '@ethersproject/wallet'
import { createMessageSend } from '@tharsis/transactions'
import {
  broadcast,
  getSender,
  LOCALNET_CHAIN,
  LOCALNET_FEE,
  signTransactionUsingEIP712,
} from '@hanchon/evmos-ts-wallet'
;(async () => {
  const privateMnemonic =
    'pluck view carry maid bamboo river major where dutch wood certain oval order wise awkward clerk adult summer because number raven coil crunch hat'
  const wallet = Wallet.fromMnemonic(privateMnemonic)
  const sender = await getSender(wallet)

  const txSimple = createMessageSend(LOCALNET_CHAIN, sender, LOCALNET_FEE, '', {
    destinationAddress: 'evmos1pmk2r32ssqwps42y3c9d4clqlca403yd9wymgr',
    amount: '1',
    denom: 'aevmos',
  })

  const resMM = await signTransactionUsingEIP712(
    wallet,
    sender.accountAddress,
    txSimple,
  )

  const broadcastRes = await broadcast(resMM)
  if (broadcastRes.tx_response.code === 0) {
    console.log('Success')
  } else {
    console.log('Error')
  }
})()

NOTE

• If your wallet didn't get any transaction, it won't be registered in the blockchain and the getSender function will throw an error.
• The getSender function should be called before sending each transaction to update the nonce or manually increment the value in the sender object.

Dependencies

• @ethersproject
• @metamask/eth-sig-util
• @creatajs/proto
• @tharsis/transactions
• node-fetch (using v2 that is limited but should work without enforcing ESM. In src/helper.ts there is a basic implementation of fetch and post that can be used to replace node-fetch, in case that lib is not working for your case)