It doesn't fit in the API class.

For example: https://github.com/nervosnetwork/ckb-sdk-ruby/pull/13/files#diff-3d60bcb04ee87c3bba4b2cf253fc6db7R23 has PREFIX_MAINNET and prefix property which is totally scoped to address format, but not API module.

hash_type: data2 will be available after hardfork 2023, and the SDK is expected to be updated correspondingly.

Ref: nervosnetwork/ckb#3908

We can add a guard in send_capacity to check whether the capacity is enough to hold the output, in this PR or a new PR.

Originally posted by @doitian in #73 (comment)

For example, if I have only one 100 bytes cell, I want to send 60 bytes to someone else, there are only 40 bytes left for change, which is not enough to hold a cell.

Either leave in the documentation on required Ruby version or consider a ".ruby-version" file that works with most Ruby version managers. The current code seems to require at least 2.4 (?). I was on an older version and got hit with unpack1.

The test code in spec seems like that the length of one arg must be 20B？ How to send args have different lengths?

    it "should build correct hash when args more than one" do
      script = CKB::Types::Script.new(
        code_hash: code_hash,
        args: "0x3954acece65096bfa81258983ddb83915fc56bd83954acece65096bfa81258983ddb83915fc56bd8"
      )
      expect(
        script.compute_hash
      ).to eq api.compute_script_hash(script)
    end
  end

creat a wallet by RPC.new, but when execute puts walleat.block_assembler_config , a mistake has occurred：

[1] pry(main)> privkey = CKB::Key.random_private_key
=> "0x1c4ad8140a2d9cdbfb316bb33781329f6eff4ccdef8796732ea257beddaec198"
[2] pry(main)> rpc = CKB::RPC.new(host:  'http://172.17.0.4:8114')
=> #<RPC@http://172.17.0.4:8114>
[3] pry(main)> wallet = CKB::Wallet.from_hex(rpc, privkey)
=> #<CKB::Wallet:0x000055a17426c788
 @api=#<RPC@http://172.17.0.4:8114>,
 @key=
  #<CKB::Key:0x000055a17426df20
   @address=#<CKB::Address:0x000055a17426c8f0 @blake160="0xfb219548477cdcb97255057fa0cfcddcd585ae95", @prefix="ckt">,
   @privkey="0x1c4ad8140a2d9cdbfb316bb33781329f6eff4ccdef8796732ea257beddaec198",
   @pubkey="0x03e162604c61b1a574de691ebc675fcb3a3fec0cfee682da241ac054e39dcf1f9b">>
[4] pry(main)> wallet.address
=> "ckt1q9gry5zglvse2jz80nwtjuj4q4l6pn7dmn2ctt54fl4sfs"
[5] pry(main)> puts wallet.block_assembler_config
NoMethodError: undefined method `system_script_code_hash' for #<RPC@http://172.17.0.4:8114>
from /ckb-sdk-ruby/lib/ckb/wallet.rb:229:in `lock'

the server in http://172.17.0.4:8114 is created by docker image nervos/ckb:latest

Hi ~

I am wondering if you can add a feature that could get more field that returned from raw RPC for get_transaction ?

e.g. for transaction 0xed2049c21ffccfcd26281d60f8f77ff117adb9df9d3f8cbe5fe86e893c66d359, the raw RPC result shown as below, which contains the reason field say that Resolv failed Deat(OutPoint... :

{
    "jsonrpc":"2.0",
    "result":{
        "transaction":null,
        "tx_status":{
            "block_hash":null,

            // I need this message. 
            "reason":"{\"type\":\"Resolve\",\"description\":\"Resolve failed Dead(OutPoint(0x8dbf552ea6278ee765421e288acbf0489c8d55172954a10d8fec2257a76e713f00000000))\"}",
            "status":"rejected"
        }
    },
    "id":42
}

However, in current Ruby SDK, it only returned a wrapped class CKB::Types::TxStatus, which don't have the reason field. shown as below:

> api = CKB::API.new(host: ENV["CKB_NODE_URL"], timeout_config: { open_timeout: 1, read_timeout: 3, write_timeout: 1 })
=> #<API@http://localhost:8114>

> api.get_transaction '0xed2049c21ffccfcd26281d60f8f77ff117adb9df9d3f8cbe5fe86e893c66d359'
=> #<CKB::Types::TransactionWithStatus:0x000055dc78e945d0 
    @transaction=nil, 
    @tx_status=#<CKB::Types::TxStatus:0x000055dc78e94990 @block_hash=nil, @status="rejected">>

so, please add this field (reason) in the returned result. e.g.

> api.get_transaction '0xed2049c21ffccfcd26281d60f8f77ff117adb9df9d3f8cbe5fe86e893c66d359'
=> #<CKB::Types::TransactionWithStatus:0x000055dc78e945d0 
    @transaction=nil, 
    @tx_status=#<CKB::Types::TxStatus:0x000055dc78e94990 @block_hash=nil, @status="rejected" @reason="Resolve failed Dead(OutPoint(0x8dbf552ea6278ee765421e288acbf0489c8d55172954a10d8fec2257a76e713f00000000))">>

thanks a lot!

• The same tx_hash is generated when consecutive transactions occur
• When sending the same price to the same address continuously, the same tx_hash is generated.
• An error occurs if it is executed several times consecutively.
• It is not clear how much the cost of the attack will be because the fee value has not yet been set. However, it is expected that it will be helpful to prevent the attack and to develop the application by giving priority to the recovery of the continuous transaction.
  This may be a daemon issue or a policy.

[60] pry(main)> send_txHash = sender_wallet.send_capacity(recv_wallet.address, 60 * 10 ** 8 )
=> "0x9f7fff7ce189c5693682eef48a7cf163824e7690c8917d4ff9ebfe0ec4ee0ef0"
[61] pry(main)> send_txHash = sender_wallet.send_capacity(recv_wallet.address, 60 * 10 ** 8 )
=> "0x9f7fff7ce189c5693682eef48a7cf163824e7690c8917d4ff9ebfe0ec4ee0ef0"
[62] pry(main)> send_txHash = sender_wallet.send_capacity(recv_wallet.address, 60 * 10 ** 8 )
=> "0x9f7fff7ce189c5693682eef48a7cf163824e7690c8917d4ff9ebfe0ec4ee0ef0"
[63] pry(main)> send_txHash = sender_wallet.send_capacity(recv_wallet.address, 60 * 10 ** 8 )
=> "0x9f7fff7ce189c5693682eef48a7cf163824e7690c8917d4ff9ebfe0ec4ee0ef0"
[64] pry(main)> send_txHash = sender_wallet.send_capacity(recv_wallet.address, 60 * 10 ** 8 )
CKB::RPCError: jsonrpc error: {:code=>-3, :message=>"UnresolvableTransaction(Dead(OutPoint { cell: Some(CellOutPoint { tx_hash: 0xa4bd28d6342a1e91bc2948d4bb34f40146e04efebda5a8107ec703e0a143e72c, index: 0 }), block_hash: Some(1c2a781b20c643dd0815446c67064647329425e337fdd35484a1c8e1904ad73f) }))"}