[bug] Bitcoin sendTransfer with the Unisat connector sends 1/100,000,000 of the amount #5822

Link to minimal reproducible example

The bug is in the connector itself and is pinned by the existing unit test, so the repo is its own reproduction:

• Connector:

  appkit/packages/adapters/bitcoin/src/connectors/UnisatConnector/index.ts

  Lines 97 to 100 in 8f9f39f

  	const result = await this.wallet.sendBitcoin(
  	params.recipient,
  	Number(UnitsUtil.parseSatoshis(params.amount, network))

• Test asserting the wrong value:

  appkit/packages/adapters/bitcoin/tests/connectors/UnisatConnector.test.ts

  Lines 139 to 142 in 8f9f39f

  	const txid = await connector.sendTransfer({ amount: '1500', recipient: 'mock_to_address' })
  	expect(txid).toBe('mock_txhash')
  	expect(wallet.sendBitcoin).toHaveBeenCalledWith('mock_to_address', 0.000015)

  (sendTransfer({ amount: '1500' }) expects sendBitcoin('mock_to_address', 0.000015))

Steps to Reproduce

1. Create AppKit with BitcoinAdapter and the bitcoin network.
2. Connect the UniSat extension (also reproduces with Bitget Wallet and Binance Web3 Wallet, which use the same connector).
3. Call sendTransfer on the bip122 provider with an amount in satoshis:

   const provider = appKit.getProvider<BitcoinConnector>('bip122')
   await provider.sendTransfer({ recipient: 'bc1q...', amount: '10000' }) // 10,000 sats

4. UniSat rejects the request ("Amount is expected to be a positive integer"), because it received 0.0001 instead of 10000.

Summary

BitcoinConnector.sendTransfer takes amount in satoshis. LeatherConnector and SatsConnectConnector pass it through as satoshis, and OKXConnector converts it to BTC because OKX's send({ value }) takes BTC.

UnisatConnector converts it the same way as OKX:

this.wallet.sendBitcoin(params.recipient, Number(UnitsUtil.parseSatoshis(params.amount, network)))

Despite its name, UnitsUtil.parseSatoshis divides by 10 ** decimals, so it returns BTC. But UniSat's sendBitcoin(toAddress, satoshis) expects an integer number of satoshis. As a result, the wallet is asked for 1/100,000,000 of the intended amount, and it rejects the request as a non-integer or dust amount. Also, because parseSatoshis formats with Intl.NumberFormat('en-US'), amounts of 1,000 BTC or more become strings like "1,000", and Number("1,000") is NaN.

Expected: sendBitcoin(params.recipient, Number(params.amount)).

Affected connectors: unisat, bitget, binancew3w (all from UNISAT_CONNECTORS). Still present on main and in 1.8.24.

List of related npm package versions

• @reown/appkit 1.8.22 (also checked main @ 8f9f39f and @reown/appkit-adapter-bitcoin 1.8.24)
• @reown/appkit-adapter-bitcoin 1.8.22
• UniSat extension 1.7.22

Node.js Version

v25.9.0

Package Manager

pnpm@9.15.9