feat: implement gasp sdk

[matusbalascak]

BREAKING CHANGE: This version is not compatible with any older ones

Breaking changes

Types

• MainTokens -> Asset[]
• TokenBalance -> Balance
• TokenId -> string
• Token -> Asset (now missing symbol and balance)

Methods

• getAssetsInfo -> sdk.asset.getAssets
• getAmountOfTokensInPool -> sdk.pool.getTvl
• calculateBuyPrice -> sdk.market.calculateBuyPrice
• getTotalIssuance -> sdk.asset.getIssuance

Working with the node API directly

SDK instance also exports complete node API that users can use to make transactions and fetch queries:

const sdk = await Gasp.create(...);

const result = await sdk.api.query.assetRegistry.metadata.entries();

await sdk.api.tx.market.multiswapAsset(...)

Signing transactions

Instead of calling signTx you now use:

const pk = "...";
const account = "0x.....";
const signer = sdk.signers.ethers.create(pk)

const tx = sdk.tx.create({ account, signer })

const extrinsic = sdk.api.tx.market.mintLiquidity(...);

const events = await tx.signAndSend({ extrinsic }).catch(console.error);
console.log(events)

What's not a part of this PR

• SignTx logic refactor - I've made some minor changes to limit existing bugs that I've found, but it's gonna require some more work to refactor it properly
• Staking functionality - Staking is working with MPL reserves and it's a bit trickier to build as it requires batching of transactions and some other logic depending on how much of the user's assets are in what 'state'. It can be included in the following priorities for the SDK