Fix isValidBtcAddress function

Pass correct value to the `validate` function from
`bitcoin-address-validation` package. The `toBcoinNetwork` function from
`tbtc-v2.ts` lib returns the network as string expected by the `bcoin`
lib(meaning `main` or `testnet`). The `bitcoin-address-validation`
package expects `mainnet` or `testnet` that match the enumerated
`BitcoinNetwork` values from `tbtc-v2.ts` lib. Here we call `valuesOf`
on the `BitcoinNetwork` enum to get the expected network as string by
the `bitcoin-address-validation` package.

src/threshold-ts/utils/bitcoin.ts

@@ -5,7 +5,6 @@ export {
  createOutputScriptFromAddress,
  createAddressFromOutputScript,
 } from "@keep-network/tbtc-v2.ts/dist/src/bitcoin"
-import { toBcoinNetwork } from "@keep-network/tbtc-v2.ts/dist/src/bitcoin-network"
 import {
  AddressType,
  getAddressInfo,
@@ -19,7 +18,7 @@ export const isValidBtcAddress = (
  address: string,
  network: BitcoinNetwork = BitcoinNetwork.Mainnet
 ): boolean => {
- return validate(address, toBcoinNetwork(network) as Network)
+ return validate(address, network.valueOf() as Network)
 }
 
 // P2PKH, P2WPKH, P2SH, or P2WSH