BuyShare

BuyShare.js

//update sender's account
const new_sender_balance = new BigNum(sender.balance).sub(lisk_amount).toString();

const new_sender_share = (!sender.asset.share)? this.asset.amount 
                : new BigNum(sender.asset.share).add(this.asset.amount).toString();

const updated_sender = { ...sender, balance: new_sender_balance, asset: { ...sender.asset, share: new_sender_share}};

store.account.set(sender.address, updated_sender);


//update manager's account
const new_manager_balance = new BigNum(Manager.balance).add(lisk_amount).toString();

var new_holders = (!Manager.asset.holders) ? {} : Manager.asset.holders;

new_holders[sender.address] = new_sender_share;

const new_share_supply = (!Manager.asset.shareSupply) ? this.asset.amount 
                  : new BigNum(Manager.asset.shareSupply).add(this.asset.amount).toString();

const updated_manager = {...Manager, balance : new_manager_balance,
                       asset:{...Manager.asset,  holders: new_holders, shareSupply: new_share_supply}};

store.account.set(updated_manager.address, updated_manager);