I need a js library for these functions, who can help me, thanks
1. build transfer transaction
input: sender's private key, sender's balance info, receiver's public key, and transfer amount, asset info, memo, fee info
output: json data with sender's signed , which can broadcast with API: blockchain_broadcast_transaction
2. build market transaction, bid/ask
input: sender's private key, sender's balance info, bid/ask, price, amount, fee info
output: json data with sender's signed , which can broadcast with API: blockchain_broadcast_transaction
3. decrypt a transfer transaction
input: transaction json data from api blockchain_list_address_balances
output: decrypt memo, and sender's info