A library to interface with the Coinbase/CoinbasePro API

• Introduction
• Dependencies
• Install
• Uninstall
• Usage
• Configuration

• Currently a work in progress.
• I'm using this project to help further my understanding of the C language so there will be many, many changes as I progress, but hopefully there will be something you can take away.
• The src/main.c file is meant as a test implementation.
• If there's anything you want to see added, please let me know!

• openssl
• libcurl

• cJSON - To format and parse the output.

To compile without installing:

git clone https://github.com/cjhead/cbpro.git
cd cbpro
make

To install:

git clone https://github.com/cjhead/cbpro.git
cd cbpro
sudo make install

To create and run a couple simple test programs:

• Note: You may need to modify LD_LIBRARY_PATH

make test
test/bin/get_all_products
test/bin/get_product
test/bin/get_product_book
test/bin/get_product_candles
test/bin/get_product_stats

sudo make uninstall

• The files in test/src/ can be used as simple templates
• When compiling your own programs, you'll need to use these flags: -lcbpro -lcurl

To begin, create a Client:

#include <cbpro.h>

int main(void) {
    struct Client *client = client_create();
}

Not every call requires user authentication. To get you started, you can try something like this:

#include <cbpro.h>

int main(void) {
    // Create the client
    struct Client *client = client_create();

    // Get all available currencies
    get_all_products(client);

    // Print results to stdout
    printf("%s\n", client->data->buffer);

    // Cleanup
    client_cleanup(client);
    curl_global_cleanup();

    return EXIT_SUCCESS;
}

Some API calls will require the user to be authenticated. Simply copy your API credentials to a locally saved file that you supply in your code. The file should look like this:

secret_key ****************
api_key *************
passphrase *********

• NOTE: This is most likely not very secure.

• You should then be able to use the functions requiring authentication.

#include <cbpro.h>

int main(void) {
    // Create the client
    struct Client *client = client_create();

    // Authenticate the client
    const char *cred_file = "creds.txt";
    FILE *fh = fopen(cred_file, "r");
    authorize_client(fh, client);

    authorize_client(cred_file, client);

    // Get all accounts belonging to the user
    get_accounts(client);

    // Print results to stdout
    printf("%s\n", client->data->buffer);

    // Cleanup
    client_cleanup(client);
    curl_global_cleanup();

    return EXIT_SUCCESS;
}

• For the functions that require authorization, you'll need to put your credentials in a text file with a format like to this:

secret_key ****************
api_key *************
passphrase *********