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# Release Note


## Release Note v5.3.1
- Fix `getBlockRange()` error for range of 1 ([#398](https://github.com/tronprotocol/tronweb/issues/398)).
- Add support for `estimateenergy` in  `TransactionBuilder#deployConstantContract()` API.

## Release Note v5.3.0
There are several changes and new features in this version. First, we upgrade the implementation of elliptic curves algorithm, which means we replace `elliptic` module to `ethereum-cryptography`. Besides, we also bump ethers lib to 6.x which will take a little break changes to several APIs. For example, `fromMnemonic` will not receive a string as the wordlist value but replaced by an `WordList` object. See more in [https://docs.ethers.org/v6/api/wordlists/#Wordlists](https://docs.ethers.org/v6/api/wordlists/#Wordlists). Ethers also imports `BigInt` so you may need to upgrade your browser to a satisfied version. In summary, here is the change log:

- Replace `elliptic` with `ethereum-cryptography/secp256k1` 
- Bump ethers to ^6.6.0
- Optimize argument validation for [createToken](https://tronweb.network/docu/docs/API%20List/transactionBuilder/createToken), [updateToken](https://tronweb.network/docu/docs/API%20List/transactionBuilder/updateToken) and [applyForSR](https://tronweb.network/docu/docs/API%20List/transactionBuilder/applyForSR) 
- callValue and tokenValue can both be 0 when the contract constructor is payable. [createSmartContract](https://tronweb.network/docu/docs/API%20List/transactionBuilder/createSmartContract)
- Support shouldPollResponse to customize poll times ([#368](https://github.com/tronprotocol/tronweb/issues/368))
- Support [Tip541](https://github.com/tronprotocol/tips/issues/541) by `transactionBuilder.cancelUnfreezeBalanceV2`
- Support [Tip542](https://github.com/tronprotocol/tips/issues/542) by adding a parameter in `transactionBuilder.delegateResource`
- Support for estimating the energy used in contract deployment by `transactionBuilder.deployConstantContract`

**Note**:

If you get some issues, please refer to solutions here.

- Error: Cannot find module '@noble/secp256k1'

We are using ethers utils and it has an uncompatible upgrade which causes the problem. To solve this issue, please install @noble/secp256k1@1.7.1 manually:

`npm install @noble/secp256k1@1.7.1`

TronWeb 6.0.0(supporting typescript) beta version has been published on npm and it will become an official version soon. Please install and enjoy it as follows:

`npm install tronweb@beta`

- Package path ./secp256k1 is not exported from package

Solution: add a alias config in your webpack config. 
```
config.resolve.alias = {
    ...config.resolve.alias,
    'ethereum-cryptography/secp256k1': require.resolve('ethereum-cryptography/secp256k1.js')
}
```
- Module not found: Error: Can't resolve 'crypto'

Solution: add a fallback config in your webpack config, and npm install `crypto-browserify`
```
config.resolve.fallback = {
    ...config.resolve.fallback,
    'crypto': require.resolve('crypto-browserify')
}
```
- Module parse failed: Unexpected token

Solution: check your webpack config.

Any other questions please open an issue [here](https://github.com/tronprotocol/tronweb/issues/new).