Invalid private key

Question

I am trying to sign transaction but I got an error and appreciate your support to know the issue here:

chain1: createrawsendfrom "1Ebo8Dos1rKGmZdyZ3Mhy2Dct8KzAPBYDxwJUU" '{"1DuDL9i8gK9AsoufuYWht3bVJAJGL5x3tEz5WT":{"dollar":2}}'                                                                                                                                                                                
{"method":"createrawsendfrom","params":["1Ebo8Dos1rKGmZdyZ3Mhy2Dct8KzAPBYDxwJUU",{"1DuDL9i8gK9AsoufuYWht3bVJAJGL5x3tEz5WT":{"dollar":2}}],"id":1,"chain_name":"chain1"}

0100000001273e245df3d0806fe511a7dd65141d739d5e84669fc88b2eecb4547577ddd8500000000000ffffffff0200000000000000003776a9145f729fa36835fa17be1caf7dab381c514d27313d88ac1c73706b719d5e84669fc88b2eecb4547577ddd85002000000000000007500000000000000003776a914649ff1e0665ab607c2f8a460b0bf15c74f0b0be688ac1c73706b719d5e84669fc88b2eecb4547577ddd85030000000000000007500000000

so the hex blob is generated but I have an error while signing:

chain1: signrawtransaction 0100000001273e245df3d0806fe511a7dd65141d739d5e84669fc88b2eecb4547577ddd8500000000000ffffffff0200000000000000003776a9145f729fa36835fa17be1caf7dab381c514d27313d88ac1c73706b719d5e84669fc88b2eecb4547577ddd85002000000000000007500000000000000003776a914649ff1e0665ab607c2f8a460b0bf15c74f0b0be688ac1c73706b719d5e84669fc88b2eecb4547577ddd85030000000000000007500000000 '[]' '["L5nEhhjBZtCMf6ekEMFcjiB2gqqm4bxobfwzTGzfjR115WNxKatW"]'
{"method":"signrawtransaction","params":["0100000001273e245df3d0806fe511a7dd65141d739d5e84669fc88b2eecb4547577ddd8500000000000ffffffff0200000000000000003776a9145f729fa36835fa17be1caf7dab381c514d27313d88ac1c73706b719d5e84669fc88b2eecb4547577ddd85002000000000000007500000000000000003776a914649ff1e0665ab607c2f8a460b0bf15c74f0b0be688ac1c73706b719d5e84669fc88b2eecb4547577ddd85030000000000000007500000000",[],["L5nEhhjBZtCMf6ekEMFcjiB2gqqm4bxobfwzTGzfjR115WNxKatW"]],"id":1,"chain_name":"chain1"}

error code: -5
error message:
Invalid private key

what is wrong about privkey? and be noted that I used address that generated from validateaddress  0274c09906a88376a85887bc0d3b466dde3998bbca7512fef90eae0484d4bb96ff to import to wallet.

Comments

Where did you get this private key from?

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From online tool (using JS to generate (offline also))that generate public and private key

Answer 1

If you generate a private key or address from a tool designed for bitcoin, they will not work on a MultiChain blockchain created with the default parameters. If you want your MultiChain blockchain to support bitcoin-compatible addressing, you need to change these parameters in params.dat to the values shown, before starting the chain:

address-pubkeyhash-version=00
address-scripthash-version=05
private-key-version=80
address-checksum-value=00000000

Comments

I get the same error while using the mentioned configurations for params.dat and also using HD wallets. Appreciate your advice as below:
Using mcrpc python lib.

address1 = '12z51oYeUSVXK8NEEdmYDxY6HdBinCkpTN'
address2 = '127da59p99E8xDNcZ5VTmkKdnJnpT1cw89'

unsigned_tx = client.createrawsendfrom(address1, {address2: {'coin': 1}})
unsigned_tx
'0100000001b0c97186c7290f6771905a6934bbeb3c5dd873771623447d98c3bdf868d812120000000000ffffffff0200000000000000003776a9140c3926190feb3dd74fd51d0d6d21f5a65243bafb88ac1c73706b71e3ae1807ff12514de2238889a50e3d6b01000000000000007500000000000000003776a91415c32fa9fe7345893a0ad78a071cef7db06a04be88ac1c73706b71e3ae1807ff12514de2238889a50e3d6bf3010000000000007500000000'

privkey = 'xprv9s21ZrQH143K4BSSxN2KG2Jxo79d1w5StZu9fSebzW2nT13x3j3VdZJnUwfrTo4ayDd373WgA2XqYkgL7niCudG65fYsMLowkHm2MkxsJY2'

signed_tx = client.signrawtransaction(unsigned_tx, [], [privkey])
so I got an error as below:
raise RpcError(data['error'].get('message'))
mcrpc.exceptions.RpcError: Invalid private key

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This doesn't look like a regular private key, but rather some extended one, probably related to the HD wallet.

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Yes, It is extended one and related to the HD wallet. So how can I sign transaction using HD wallet ?

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I'm afraid this question is a bit out of our scope here. You would need to understand more about the HD wallet's scheme and features to obtain from it a regular (private key, address) pair, then ensure that address has the appropriate permissions on the blockchain and send a transaction using one of its unspent outputs. MultiChain doesn't currently have any built-in HD support.