Hermes compatibility

[AlexBHarley]

Just wanted to flag that something in the @cosmjs/stargate package breaks in Hermes. Basically requiring the package yields undefined.

If I find anything I'll update this issue.

[AlexBHarley]

I've nailed it down to this line

export const defaultGasPrice = GasPrice.fromString("0.025ucosm");

In cosmjs/packages/stargate/src/signingstargateclient.ts

[AlexBHarley]

This is the regex it doesn't like, const matchResult = gasPrice.match(/^(?<amount>.+?)(?<denom>[a-z]+)$/); because Hermes doesn't support Regex groups facebook/hermes#89.

[webmaster128]

Thanks for bringing this up. I was not aware of any regex syntax change. I would have expected that TypeScript converts this or errors since our target is es2017. There is a TypeScript bug that describes this problem: microsoft/TypeScript#36132.