Topic: Try to understand Segwit. I Found it's not easy... (Read 236 times)

So I'm searching for bitcoin segwit wallet.

OK Thanks for the reply. that's awesome.

my next question is

is there any segwit wallet give you address start with 3 and not a multi-sig wallet and give you the private key?
seems electrum's address is not compatible with some other system.
some wallet or exchange may not able transfer to your address?

or
is there any segwit wallet allow you control a segwit paper wallet.

btw shouldn't segwit supposed to reduce tx size?
8ef03ebe095927da7e2d9b51d207424a3079ad045f3a64540a1667d87d5d551d compressed to compressed + compressed = 225 (bytes)
735e692ff8e7334f2d51fa6ec14c83067f35ff387be6c46f6fa42ac511fa9fd1 segwit to segwit + segwit = 247 (bytes)
or the second tx input is from multisig address?

As of version 3.0, released last month, Electrum does support Segwit!  You need to generate a new Electrum wallet for this; and if you select “Segwit wallet”, it will only give you Bech32 addresses.  If you want Bech32 addresses, then your problem is solved.  Bech32 addresses are technically superior to old-style addresses; but they are not backward-compatible, so only people with Segwit support will be able to send you money.  I myself hope to switch to Bech32 in perhaps 6–12 months.  Future viewers of this post will see my signature showing an address which starts with “bc”.

To make Electrum give you a wallet of backward-compatible P2WPKH-nested-in-P2SH “3” addresses like the one you see now in my signature, use the following procedure, which I have tested:  (0) Generate a BIP39 seed by some other means.  I wrote a short C program for this, which I should polish up and post online; BIP 39 itself contains a list of implementations, including the Python reference implementation.  (1) In the new wallet dialogue, tell Electrum that you already have a seed.  (2) In the seed entry dialogue, click the button for more options and tell Electrum you’re using a BIP39 seed.  (3) In the next screen, change the derivation path to m/49'/0'/0'.  The only part which needs to be changed is the “49”.  You may refer to BIP 49 (as to the 49, the “purpose”) and BIP 44 (for the two zeroes, “coin type” and “account”) to confirm that I am not giving you bad instructions which will send your money off into the weeds; I mention that because I’ve seen Internet posts get this part wrong.

to have segwit addresses starting with a 3 in Electrum just follow these simple steps:

1) generate a bip39, 12 words seed on https://iancoleman.io/bip39/ (use it offline for more security)
2) on electrum choose, File -> New/Restore -> Standard Wallet -> I already have a seed -> click on "options" and choose bip39, write the seed then click next
3) on derivation path path use: m/49'/0'/0'/0

that's all. Remember to save in a safe place the seed as electrum will not show it (read below)

some wallet or exchange may not able transfer to your address?

Electrum is one.  There are probably others.  I haven't built a list yet.

One is Electrum.
it's address is start with bc1 yeah it's great and it gave you private keys
BUT. blockchain.info can't search it's transaction.

seems like bc1 address is not compatible with old wallet and system.

1. is an address start with 3 is a multi sign address?

that means you don't have full rights on you coins?

2. is an segwit address need to be a multi sign address?

3. which segwit wallet will give me the full right? (don't need others to approve)

4. if No.3 is no is that means segwit is a system that need someone to approve you transaction?