C4H4

Coin for H4

Overview

C4H4 is a centralized coin for H4 project based on UTXO and git. Voting and multi-signature may be used to decentralize the power of the verifiers, but it is still a kind of centralized implement of digital asset. Although it is a centralized way, all the data is auditable.

The total supply of C4H4 is 1 but the coin has infinite divisibility.

Send your transaction by pull request. The transaction is finished once the commit is merged to master branch.

Current unspent coins will be placed in coin folder. See Coin

Specification

Address

Currently we support the following types of address

• RSA

The following types of address will be supported in the future

• ECDSA
• Schnorr
• BLS

RSA Address Generate

Use the following command to generate a private key of 4096 bits

openssl genrsa -out key.pem 4096

Use the following command to output the public key.

openssl rsa -in key.pem -outform PEM -pubout -out key.pub.pem

The a PEM formatted 4096 bits RSA address is generated

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA50c54B4zoVgFvwUwUu0L
VWSP9z8fDjRYozV/BvaXL+FdffhiIwtvLioe4Iyk9sGtF2HEaQhK/01fEvTMtAeR
JTrB3dlYNGY/JduqmgGvUnEWOMnWsehOWLuYDPgEuvFPgazA606LdCu0qAT2qJJT
46zWpBUeTENQKtWDBM8j89lzNQJmrWPeqbjAauSEt2rjhEa+ZpU/EGz31xKmiMkf
537+nf+YFsgdT+ALshGQZIYG0lFCqWp/y2eIc2/HCUzDDXAWvY5BRS3gpj474x/i
17Ze5515sPtLx7aIuCN0of4AHTH1cOif9k4LuF5CyzKRS5aaZHXt1OMrKcaQft4Y
AgX8bYGDNArD4RSL9KKr12Ly7Pfz2R+ZBClte0nL9Xc4ZttqtIgdw4fCBPQwQOPF
k8L0pamGf6Z3kSPp+MFEo/EfbPOnj+CjrkW3InUKqICoefMUuoQ+1J5HkHu6NtU3
XvepBZoQs60HmHjBXUW03dTi8RTTvJ6Qrdgod92tYCPlrm67LVSoUWS8wuU+5rPh
oQNuDrczfG0XG2opA5Xxdo/OlhwzuRfeb3a4aVtyNJVYQFgo/AEcF4CuhJospV6P
sWucBfdPVYfpvTzxEmduJs/kfVZa7Y1cAX4Ipp2Z5pCgH26cEne1ljDsIKHd9+kg
9ZNEdO0OmrG8KjIQUK1lW6cCAwEAAQ==
-----END PUBLIC KEY-----

Coin

Current unspent coins will be placed in coin folder. Each file represents one unspent coin.

Filename

Filename must be the SHA-512 digest of its content.

The following command can be used to calculate the digest.

openssl dgst -sha512 -

Content

The file is in XML format which follows the DTD file c4h4.dtd in coin folder.

<!ELEMENT h4 (coin, key)>
<!ELEMENT coin (numerator, denominator)>
<!ELEMENT numerator (#PCDATA)>
<!ELEMENT denominator (#PCDATA)>
<!ELEMENT key (#PCDATA)>
<!ATTLIST key type CDATA #REQUIRED>
<!ATTLIST key format CDATA #REQUIRED>

Transfer

Create the Transaction

synchronize the repository

git checkout master
git pull

remove old coins

rm coin/00bf5fcb92bfddb1f41ea9372e6868b9e25466c310f140240c8809710fdb2e0acb525a7f494d5188fb79ba00006770add75a81408cbe914f71449603ee24c785.xml

create new coins and name the file as temp.1.xml, temp.2.xml

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<!DOCTYPE h4 SYSTEM "c4h4.dtd">
<h4>
    <coin>
        <numerator>1</numerator>
        <denominator>2</denominator>
    </coin>
    <key type="rsa" format="pem">
        -----BEGIN PUBLIC KEY-----
        MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAm4VFEKwcbTmMWT1rkubc
        XbzYGscBx+Y+tFqTROKL4SAVLZx4LzcqHFMA7x+FO8A2h1IPiNDcbA/4MAUFsMjn
        6CjG3WafV3Zx4HZSmxcleUIuNYMsTOfProj3Qa9OE4MYOJmPNQy1NG1oeMo1PXzc
        5FcGPeW0EJpBdb7lG7nZSZxmoo2dQVj2NF4S22YaJMWAZa1cXbfxu5WgvJhVxp+R
        PavfhmOz0OpEmqk+jMG2n7c23vMWdsVeg1Mh3RHseEIgF+1+N8Lg+aMQ7KmX2u7f
        eWGGHX11+1UAS/qTjSSVZ2jhB6EG/pPEeLTpgNkdnLWE1F6Mz9/JKvKDRcane9yj
        rMr+PJQSaegfWX76KEHF9mgrRaoQtzhk/ToO7iESGusn7fKdEGQCSN7wqZBvwHVF
        Nuyv5xz6t3C35ntWUF7PH8Grt8LZtYURz4iTScZ4NPsAt7huO9qR0mYAQ5qKkLJD
        JRjERaAD7AyAyQI6uc4QTD7J39grScITCxYw4emoUqa97ENttp9S2R8QyZ6KiN27
        JHB2SmFKV1lzjaEjEjGiLWm+JpFY5gBsK4mYGFweXF+bJk1LvbsK/fQ+2WpVC/LC
        5AO7zbgoH38zzfkpc0PcOokc/fJM0R5kqFuzQuMUAXZmF4lN7/xb2FNDBdVx2vcF
        1tl8dVfMGodhIfpTiidheUcCAwEAAQ==
        -----END PUBLIC KEY-----        
    </key>
</h4>

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<!DOCTYPE h4 SYSTEM "c4h4.dtd">
<h4>
    <coin>
        <numerator>1</numerator>
        <denominator>2</denominator>
    </coin>
    <key type="rsa" format="pem">
        -----BEGIN PUBLIC KEY-----
        MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA50c54B4zoVgFvwUwUu0L
        VWSP9z8fDjRYozV/BvaXL+FdffhiIwtvLioe4Iyk9sGtF2HEaQhK/01fEvTMtAeR
        JTrB3dlYNGY/JduqmgGvUnEWOMnWsehOWLuYDPgEuvFPgazA606LdCu0qAT2qJJT
        46zWpBUeTENQKtWDBM8j89lzNQJmrWPeqbjAauSEt2rjhEa+ZpU/EGz31xKmiMkf
        537+nf+YFsgdT+ALshGQZIYG0lFCqWp/y2eIc2/HCUzDDXAWvY5BRS3gpj474x/i
        17Ze5515sPtLx7aIuCN0of4AHTH1cOif9k4LuF5CyzKRS5aaZHXt1OMrKcaQft4Y
        AgX8bYGDNArD4RSL9KKr12Ly7Pfz2R+ZBClte0nL9Xc4ZttqtIgdw4fCBPQwQOPF
        k8L0pamGf6Z3kSPp+MFEo/EfbPOnj+CjrkW3InUKqICoefMUuoQ+1J5HkHu6NtU3
        XvepBZoQs60HmHjBXUW03dTi8RTTvJ6Qrdgod92tYCPlrm67LVSoUWS8wuU+5rPh
        oQNuDrczfG0XG2opA5Xxdo/OlhwzuRfeb3a4aVtyNJVYQFgo/AEcF4CuhJospV6P
        sWucBfdPVYfpvTzxEmduJs/kfVZa7Y1cAX4Ipp2Z5pCgH26cEne1ljDsIKHd9+kg
        9ZNEdO0OmrG8KjIQUK1lW6cCAwEAAQ==
        -----END PUBLIC KEY-----
    </key>
</h4>

calculate the digest of the new coins and place the new coins to the coin folder

mv temp.1.xml coin/$(openssl dgst -sha512 -r temp.1.xml |cut -d ' ' -f 1).xml
mv temp.2.xml coin/$(openssl dgst -sha512 -r temp.2.xml |cut -d ' ' -f 1).xml

Sign the Transaction

git add the change

git add coin/

create diff.log

git diff --name-status --no-renames --cached > diff.log

sign diff.log by private key key.pem

openssl dgst -sha512 -sign key.pem -out diff.sign diff.log

encode diff.sign to hex format

xxd -p diff.sign diff.sign.enc

commit the change

git commit -F diff.sign.enc

Send the Transaction

push the commit and submit pull request

git push

once the pull request is merged to master branch, the transaction is finished.