@morphism-labs/core-utils

What is this?

@morphism-labs/core-utils contains the Morphism Virtual Machine core utilities.

Getting started

Building and usage

After cloning and switching to the repository, install dependencies:

1$ yarn

Use the following commands to build, use, test, and lint:

1$ yarn build
2$ yarn test
3$ yarn lint

L2 Fees

TxGasLimit can be used to encode and decode the L2 Gas Limit locally.

1import { TxGasLimit } from '@morphism-labs/core-utils'
2import { JsonRpcProvider } from 'ethers'
3
4const L2Provider = new JsonRpcProvider('http://127.0.0.1:9545')
5const L1Provider = new JsonRpcProvider('http://127.0.0.1:8545')
6
7const l2GasLimit = await L2Provider.send('eth_estimateExecutionGas', [tx])
8const l1GasPrice = await L1Provider.getGasPrice()
9
10const encoded = TxGasLimit.encode({
11  data: '0x',
12  l1GasPrice,
13  l2GasLimit,
14  l2GasPrice: 10000000,
15})
16
17const decoded = TxGasLimit.decode(encoded)
18assert(decoded.eq(gasLimit))
19
20const estimate = await L2Provider.estimateGas()
21assert(estimate.eq(encoded))