laconic-sdk/src/txbuilder.ts

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import assert from 'assert';
import {
createTxRawEIP712,
signatureToWeb3Extension,
Chain,
Sender
} from '@tharsis/transactions'
import { Account } from './account';
/**
* Generate a cosmos-sdk transaction.
*/
export const createTransaction = (message: any, account: Account, sender: Sender, chain: Chain) => {
assert(message);
assert(account);
// Sign transaction.
const signature = account.sign(message);
let extension = signatureToWeb3Extension(chain, sender, signature)
// Create the txRaw.
return createTxRawEIP712(message.legacyAmino.body, message.legacyAmino.authInfo, extension)
};