gulliver/oc-mint
0
0
Fork 0
mirror of https://github.com/OpenCoin/oc-mint-cpp.git synced 2024-12-22 07:39:40 +01:00
Code Issues Packages Projects Releases Wiki Activity

introduced and used bigint datatype
All checks were successful
continuous-integration/drone/push Build is passing
Details

Browse Source
This commit is contained in:
gulliver 2022-12-05 23:39:56 +01:00 committed by gittiver
parent 0d3ffa0e5d
commit 87386e1b65
8 changed files with 341 additions and 132 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
CMakeLists.txt
View File

@ -71,7 +71,7 @@ doxygen_add_docs(
)
# build common library
set(LIB_SOURCES src/model.cpp src/model.hpp)
set(LIB_SOURCES src/model.cpp src/model.hpp src/big_int.hpp src/big_int.cpp)
add_library(oc-mint-lib ${LIB_SOURCES})
target_link_libraries(oc-mint-lib PUBLIC Crow::Crow)
target_include_directories(oc-mint-lib PUBLIC ${expected_SOURCE_DIR}/include src)
@ -80,7 +80,7 @@ add_executable(oc-mint src/main.cpp)
target_link_libraries(oc-mint PRIVATE oc-mint-lib INTERFACE tl::expected::expected)
## these are unittests that can be run on any platform
add_executable(tests test/test.cpp)
add_executable(tests test/test_big_int.cpp test/test.cpp)
target_link_libraries(tests
oc-mint-lib
Catch2::Catch2WithMain)

108
src/big_int.cpp Normal file
View File

@ -0,0 +1,108 @@
#include "big_int.hpp"
#include "tl/expected.hpp"
#include <iostream>
#include <charconv>
#include <vector>
inline uint8_t hex(char c) {
switch(c) {
case '0': return 0;
case '1': return 1;
case '2': return 2;
case '3': return 3;
case '4': return 4;
case '5': return 5;
case '6': return 6;
case '7': return 7;
case '8': return 8;
case '9': return 9;
case 'a': return 10;
case 'b': return 11;
case 'c': return 12;
case 'd': return 13;
case 'e': return 14;
case 'f': return 15;
case 'A': return 10;
case 'B': return 11;
case 'C': return 12;
case 'D': return 13;
case 'E': return 14;
case 'F': return 15;
default:
return 0xff;
}
}
tl::expected<BigInt,BigInt::eError>
BigInt::from_string(const std::string& str) {
BigInt b;
// std::cout << str << std::endl;
uint8_t hval=0;
uint8_t nibble;
size_t i = str.size()+1;
for(auto c : str) {
nibble = hex(c);
if (nibble ==0xFF) {
return tl::make_unexpected(eError::PARSE_ERROR);
}
if (i%2) {
hval = nibble << 4;
} else {
hval |= nibble;
b.data[256 - (i/2)]= hval;
hval = 0;
}
i--;
}
// std::cout << std::hex;
// for (auto b: b.data)
// {
// std::cout << (int)b;
// }
// std::cout << std::dec << std::endl;
return b;
}
BigInt BigInt::from_int(uint64_t value)
{
BigInt b;
b.data[248]=(value >> 56 & 0xff);
b.data[249]=(value >> 48 & 0xff);
b.data[250]=(value >> 40 & 0xff);
b.data[251]=(value >> 32 & 0xff);
b.data[252]=(value >> 24 & 0xff);
b.data[253]=(value >> 16 & 0xff);
b.data[254]=(value >> 8 & 0xff);
b.data[255]=(value & 0xff);
return b;
}
constexpr char hex_char [] = "0123456789abcdef";
std::string BigInt::to_string() const
{
std::string s;
uint8_t b;
uint8_t first_digit = 0;
for (size_t i = 0; i<256;i++) {
b = data[i];
if (first_digit==0) {
if (b==0) {
continue;
} else if (b>0xf) {
s.push_back(hex_char[b >> 4]);
}
s.push_back(hex_char[b & 0xf]);
first_digit = b;
} else {
s.push_back(hex_char[b >> 4]);
s.push_back(hex_char[b & 0xf]);
}
}
return s;
}
bool operator == (const BigInt& rhs, const BigInt& lhs)
{ return rhs.data == lhs.data; }

27
src/big_int.hpp Normal file
View File

@ -0,0 +1,27 @@
#ifndef BIG_INT_HPP
#define BIG_INT_HPP
#include <string>
#include <array>
#include "tl/expected.hpp"
struct BigInt {
BigInt() : data() {}
virtual ~BigInt() {}
enum class eError : uint8_t { PARSE_ERROR };
static tl::expected<BigInt, eError> from_string(const std::string &str);
static BigInt from_int(uint64_t value);
std::string to_string() const;
friend bool operator == (const BigInt& rhs, const BigInt& lhs);
private:
std::array<uint8_t,256> data;
};
bool operator==(const BigInt &rhs, const BigInt &lhs);
#endif // #ifndef #ifndef BIG_INT_HPP

3
src/main.cpp
View File

@ -70,7 +70,8 @@ int main() {
ResponseMint res;
res.message_reference = req->message_reference;
auto minted = model->mint(req->transaction_reference, req->blinds);
/// \todo change argument transaction_reference to bigint
auto minted = model->mint(req->transaction_reference.to_string(), req->blinds);
res.blind_signatures = minted;
res.status_code = crow::status::OK;

82
src/model.cpp
View File

@ -1,7 +1,9 @@
#include "model.hpp"
#include "crow/json.h"
#include "tl/expected.hpp"
#define TO_JSON(name) r[#name]=name
#define BIGINT_TO_JSON(name) r[#name]=name.to_string()
#define TO_JSON_JSON(name) r[#name]=name.to_json()
#define TO_JSON_ARRAY(name) r[#name]=list_to_json(name)
@ -22,8 +24,8 @@ crow::json::wvalue list_to_json(const std::vector<unsigned int> &array) {
crow::json::wvalue PublicKey::to_json() const {
crow::json::wvalue r;
TO_JSON(modulus);
TO_JSON(public_exponent);
BIGINT_TO_JSON(modulus);
BIGINT_TO_JSON(public_exponent);
r["type"]="rsa public key";
return r;
}
@ -48,7 +50,7 @@ crow::json::wvalue CDD::to_json() const {
TO_JSON(currency_divisor);
TO_JSON(currency_name);
TO_JSON_ARRAY(denominations);
TO_JSON(id);
BIGINT_TO_JSON(id);
TO_JSON_ARRAY(info_service);
TO_JSON(issuer_cipher_suite);
TO_JSON_JSON(issuer_public_master_key);
@ -75,8 +77,8 @@ crow::json::wvalue MintKey::to_json() const {
TO_JSON(cdd_serial);
TO_JSON(coins_expiry_date);
TO_JSON(denomination);
TO_JSON(id);
TO_JSON(issuer_id);
BIGINT_TO_JSON(id);
BIGINT_TO_JSON(issuer_id);
TO_JSON_JSON(public_mint_key);
TO_JSON(sign_coins_not_after);
@ -178,7 +180,12 @@ RequestMKCs::from_string(const std::string &str) {
return tl::make_unexpected(eError::JSON_WRONG_REQUEST_TYPE);
} else {
for (auto k: mint_key_ids.lo()) {
r.mint_key_ids.push_back(k.u());
auto kv = BigInt::from_string(k.s());
if (!kv.has_value()) {
return tl::make_unexpected(eError::JSON_PARSE_ERROR);
} else {
r.mint_key_ids.push_back(*kv);
}
}
}
return r;
@ -194,23 +201,37 @@ crow::json::wvalue ResponseMKCs::to_json() const {
crow::json::wvalue Blind::to_json() const {
crow::json::wvalue r;
TO_JSON(blinded_payload_hash);
TO_JSON(mint_key_id);
BIGINT_TO_JSON(blinded_payload_hash);
BIGINT_TO_JSON(mint_key_id);
TO_JSON(reference);
r["type"] = "blinded payload hash";
return r;
}
tl::expected<Blind, eError> Blind::from_json(const crow::json::rvalue &json) {
if (!(json.has("type") && json.has("blinded_payload_hash") &&
json.has("mint_key_id") && json.has("reference"))) {
if (!(json.has("type")
&& json.has("blinded_payload_hash")
&& json.has("mint_key_id")
&& json.has("reference"))) {
return tl::make_unexpected(eError::JSON_ERROR);
} else if (json["type"] != "blinded payload hash") {
return tl::make_unexpected(eError::JSON_ERROR);
} else {
Blind r;
r.blinded_payload_hash = json["blinded_payload_hash"].s();
r.mint_key_id = json["mint_key_id"].s();
auto hash = BigInt::from_string(json["blinded_payload_hash"].s());
if (!hash) {
// std::cout << "invalid hash : " << json["blinded_payload_hash"].s()
// << std::endl;
return tl::make_unexpected(eError::JSON_PARSE_ERROR);
}
r.blinded_payload_hash = hash.value();
auto key_id = BigInt::from_string(json["mint_key_id"].s());
if (!key_id) {
return tl::make_unexpected(eError::JSON_PARSE_ERROR);
}
r.mint_key_id = key_id.value();
r.reference = json["reference"].s();
return r;
}
@ -218,7 +239,7 @@ tl::expected<Blind, eError> Blind::from_json(const crow::json::rvalue &json) {
crow::json::wvalue BlindSignature::to_json() const {
crow::json::wvalue r;
TO_JSON(blind_signature);
BIGINT_TO_JSON(blind_signature);
TO_JSON(reference);
r["type"] = "blind signature";
return r;
@ -239,7 +260,11 @@ RequestMint::from_string(const std::string &str) {
} else {
RequestMint r;
r.message_reference= json["message_reference"].u();
r.transaction_reference = json["transaction_reference"].s();
auto tr = BigInt::from_string(json["transaction_reference"].s());
if (!tr)
return tl::make_unexpected(eError::JSON_PARSE_ERROR);
r.transaction_reference = *tr;
if (json["blinds"].t()!=crow::json::type::List) {
return tl::make_unexpected(eError::JSON_WRONG_VALUE_TYPE);
}
@ -267,10 +292,10 @@ crow::json::wvalue Coin::Payload::to_json() const {
crow::json::wvalue r;
TO_JSON(cdd_location);
TO_JSON(denomination);
TO_JSON(issuer_id);
TO_JSON(mint_key_id);
BIGINT_TO_JSON(issuer_id);
BIGINT_TO_JSON(mint_key_id);
TO_JSON(protocol_version);
TO_JSON(serial);
BIGINT_TO_JSON(serial);
r["type"] = "payload";
return r;
@ -297,10 +322,20 @@ Coin::Payload::from_json(const crow::json::rvalue &json) {
Coin::Payload payload;
payload.cdd_location = json["cdd_location"].s();
payload.denomination = json["denomination"].u();
payload.issuer_id = json["issuer_id"].s();
payload.mint_key_id = json["mint_key_id"].s();
auto id = BigInt::from_string(json["issuer_id"].s());
if (!id)
tl::make_unexpected(eError::JSON_PARSE_ERROR);
payload.issuer_id = *id;
id = BigInt::from_string(json["mint_key_id"].s());
if (!id)
tl::make_unexpected(eError::JSON_PARSE_ERROR);
payload.mint_key_id = *id;
payload.protocol_version = json["protocol_version"].s();
payload.serial = json["serial"].s();
id = BigInt::from_string(json["serial"].s());
if (!id)
tl::make_unexpected(eError::JSON_PARSE_ERROR);
payload.serial = *id;
return payload;
}
}
@ -392,7 +427,10 @@ RequestResume::from_string(const std::string &str) {
} else {
RequestResume r;
r.message_reference = json["message_reference"].u();
r.transaction_reference = json["transaction_reference"].s();
auto tr = BigInt::from_string(json["transaction_reference"].s());
if (!tr)
return tl::make_unexpected(eError::JSON_PARSE_ERROR);
r.transaction_reference = *tr;
return r;
}
}
@ -462,7 +500,7 @@ public:
const std::vector<MintKeyCert>
getMKCs(const std::vector<unsigned int> &denominations,
const std::vector<unsigned int> &mint_key_ids) override {
const std::vector<BigInt> &mint_key_ids) override {
std::vector<MintKeyCert> res;
cout << __FUNCTION__ << endl;
return res;

37
src/model.hpp
View File

@ -9,10 +9,11 @@
#include "crow/json.h"
#include "tl/expected.hpp"
#include "big_int.hpp"
struct PublicKey {
std::string modulus; //: "daaa63ddda38c189b8c49020c8276adbe0a695685a...",
std::string public_exponent; //: 65537,
BigInt modulus; //: "daaa63ddda38c189b8c49020c8276adbe0a695685a...",
BigInt public_exponent;//: 65537,
crow::json::wvalue to_json() const;
};
@ -35,7 +36,8 @@ struct CDD {
size_t currency_divisor;//: 100,
std::string currency_name;//: OpenCent,
std::vector<unsigned> denominations;//: [1, 2, 5],
std::string id; //: 23ed956e629ba35f0002eaf833ea436aea7db5c2,
BigInt id;//: 23ed956e629ba35f0002eaf833ea436aea7db5c2,
std::vector<WeightedUrl> info_service;
/* eCipherSuite*/ std::string issuer_cipher_suite; //: RSA-SHA256-PSS-CHAUM82,
PublicKey
@ -64,8 +66,8 @@ struct MintKey {
unsigned int cdd_serial;
std::string coins_expiry_date; //": "2023-10-30T15:45:53.164685",
unsigned int denomination; //": 1,
std::string id; // "1ceb977bb531c65f133ab8b0d60862b17369d96",
std::string issuer_id; //": "23ed956e629ba35f0002eaf833ea436aea7db5c2",
BigInt id; // "1ceb977bb531c65f133ab8b0d60862b17369d96",
BigInt issuer_id; //": "23ed956e629ba35f0002eaf833ea436aea7db5c2",
PublicKey public_mint_key;
std::string sign_coins_not_after;
@ -128,7 +130,7 @@ struct RequestMKCs {
std::vector<unsigned int> denominations;
unsigned int message_reference; /// Client internal message reference.
/// (Integer)
std::vector<unsigned int> mint_key_ids;
std::vector<BigInt> mint_key_ids;
// "type": "request mint key certificates"
static tl::expected<RequestMKCs, eError> from_string(const std::string &str);
};
@ -140,15 +142,15 @@ struct ResponseMKCs : Response {
};
struct Blind {
std::string blinded_payload_hash; // bigint
std::string mint_key_id; // bigint
BigInt blinded_payload_hash; //bigint
BigInt mint_key_id; //bigint
std::string reference;
crow::json::wvalue to_json() const;
static tl::expected<Blind, eError> from_json(const crow::json::rvalue &json);
};
struct BlindSignature {
std::string blind_signature;
BigInt blind_signature;
std::string reference;
crow::json::wvalue to_json() const;
};
@ -156,7 +158,7 @@ struct BlindSignature {
struct RequestMint {
unsigned int message_reference; /// Client internal message reference.
/// (Integer)
std::string transaction_reference;
BigInt transaction_reference;
std::vector<Blind> blinds;
// "type": "request mint"
static tl::expected<RequestMint, eError> from_string(const std::string &str);
@ -172,14 +174,13 @@ struct Coin {
struct Payload {
std::string cdd_location;
unsigned int denomination;
std::string issuer_id;
std::string mint_key_id;
BigInt issuer_id;
BigInt mint_key_id;
std::string protocol_version;
std::string serial;
BigInt serial;
crow::json::wvalue to_json() const;
static tl::expected<Payload, eError>
from_json(const crow::json::rvalue &json);
static tl::expected<Payload,eError> from_json(const crow::json::rvalue& json);
};
Payload payload;
@ -213,7 +214,7 @@ struct ResponseDelay : Response {
struct RequestResume {
unsigned int message_reference; /// Client internal message reference.
/// (Integer)
std::string transaction_reference;
BigInt transaction_reference;
// "type": "request resume"
static tl::expected<RequestResume, eError>
from_string(const std::string &str);
@ -241,10 +242,10 @@ public:
virtual const std::vector<MintKeyCert>
getMKCs(const std::vector<unsigned int> &denominations,
const std::vector<unsigned int> &mint_key_ids) = 0;
const std::vector<BigInt> &mint_key_ids) = 0;
virtual std::vector<BlindSignature>
mint(const std::string &transaction_reference,
mint(std::string const& transaction_reference,
const std::vector<Blind> &blinds) = 0;
virtual bool redeem(const std::vector<Coin> &coins) = 0;

49
test/test.cpp
View File

@ -3,12 +3,14 @@
#include <catch2/catch_test_macros.hpp>
TEST_CASE( "PublicKey::to_json", "[to_json]" ) {
PublicKey k{"daaa63ddda38c189b8c49020c8276adbe0a695685a...", "65537"};
PublicKey k //{ BigInt::from_string("daaa63ddda38c189b8c49020c8276adbe0a695685a...").value(),
// BigInt::from_int(65537UL) };
;
auto json = k.to_json();
REQUIRE(json["modulus"].dump() == "\"" + k.modulus + "\"");
REQUIRE(json["public_exponent"].dump() == "\"" + k.public_exponent + "\"");
REQUIRE( json["modulus"].dump() == "\"" + k.modulus.to_string() + "\"" );
REQUIRE( json["public_exponent"].dump() == "\"" + k.public_exponent.to_string()+"\"" );
REQUIRE( json["type"].dump() == "\"rsa public key\"" );
REQUIRE( json.keys().size() == 3 );
}
@ -76,15 +78,14 @@ TEST_CASE("RequestCDDC::from_string", "[from_string]") {
TEST_CASE("RequestMKCs::from_string", "[from_string]") {
// good case
auto res =
RequestMKCs::from_string("{"
auto res = RequestMKCs::from_string( "{"
"\"denominations\": [1, 2, 5],"
"\"message_reference\": 100002,"
"\"mint_key_ids\": [],"
"\"type\": \"request mint key certificates\""
"}");
const std::vector<uint32_t> EXPECTED_DENOMINATIONS = {1,2,5};
const std::vector<uint32_t> EXPECTED_MINT_KEY_IDS = {};
const std::vector<BigInt> EXPECTED_MINT_KEY_IDS = {};
REQUIRE(res.has_value() == true);
REQUIRE(res->denominations == EXPECTED_DENOMINATIONS);
@ -129,7 +130,7 @@ TEST_CASE("Blind::from_json", "[from_string]") {
auto good = crow::json::load(
"{"
"\"blinded_payload_hash\": "
"\"924edb672c3345492f38341ff86b57181da4c673ef...\","
"\"924edb672c3345492f38341ff86b57181da4c673efd5fd76c0f64e369974c678f89ffcb1c5f77bf04911a9a63831b52675b70c06548a4d945ec5dd1d825ab08\","
"\"mint_key_id\": \"1ceb977bb531c65f133ab8b0d60862b17369d96\","
"\"reference\": \"a0\","
"\"type\": \"blinded payload hash\""
@ -137,41 +138,38 @@ TEST_CASE("Blind::from_json", "[from_string]") {
auto res = Blind::from_json(good);
REQUIRE(res.has_value()==true);
REQUIRE(res->blinded_payload_hash ==
"924edb672c3345492f38341ff86b57181da4c673ef...");
REQUIRE(res->mint_key_id == "1ceb977bb531c65f133ab8b0d60862b17369d96");
REQUIRE(res->blinded_payload_hash.to_string()==
"924edb672c3345492f38341ff86b57181da4c673efd5fd76c0f64e369974c678f89ffcb1c5f77bf04911a9a63831b52675b70c06548a4d945ec5dd1d825ab08");
REQUIRE(res->mint_key_id.to_string()=="1ceb977bb531c65f133ab8b0d60862b17369d96");
REQUIRE(res->reference=="a0");
// bad cases
// wrong_type["blinded_payload_hash"]=
// "924edb672c3345492f38341ff86b57181da4c673ef..."; wrong_type["mint_key_id"]=
// "1ceb977bb531c65f133ab8b0d60862b17369d96"; wrong_type["reference"] = "a0";
// wrong_type["blinded_payload_hash"]= "924edb672c3345492f38341ff86b57181da4c673ef...";
// wrong_type["mint_key_id"]= "1ceb977bb531c65f133ab8b0d60862b17369d96";
// wrong_type["reference"] = "a0";
// wrong_type["type"]= "wrong type";
// res = Blind::from_json(wrong_type);
}
TEST_CASE("RequestMint::from_string", "[from_string]") {
// good case
auto res = RequestMint::from_string(
"{"
auto res = RequestMint::from_string( "{"
"\"blinds\": ["
"{"
"\"blinded_payload_hash\": "
"\"924edb672c3345492f38341ff86b57181da4c673ef...\","
"\"blinded_payload_hash\": \"924edb672c3345492f38341ff86b57181da4c673efd5fd76c0f64e369974c678f89ffcb1c5f77bf04911a9a63831b52675b70c06548a4d945ec5dd1d825ab08\","
"\"mint_key_id\": \"1ceb977bb531c65f133ab8b0d60862b17369d96\","
"\"reference\": \"a0\","
"\"type\": \"blinded payload hash\""
"},"
"{"
"\"blinded_payload_hash\": "
"\"95db92e1c46ebea5edec5e508a831263de6fb78b4c...\","
"\"blinded_payload_hash\": \"95db92e1c46ebea5edec5e508a831263de6fb78b4cf9187593f6af815b51db9db35ad5eaf2c0c83bd7e13c999df4f0f1af65b367eb7c2b6addb9735dce156b5\","
"\"mint_key_id\": \"f2864e5cd937dbaa4825e73a81062de162143682\","
"\"reference\": \"a1\","
"\"type\": \"blinded payload hash\""
"},"
"{"
"\"blinded_payload_hash\": "
"\"10afac98ac43eb40e996c621d5db4d2238348e3f74...\","
"\"blinded_payload_hash\": \"10afac98ac43eb40e996c621d5db4d2238348e3f74850856d940955da0fd24fa4d3aee79da1e9da24e85cf9cefd96feaca5b26a9353a3d9fcb4bd34145046ce8\","
"\"mint_key_id\": \"897a16bf12bd9ba474ef7be0e3a53553a7b4ece8\","
"\"reference\": \"a2\","
"\"type\": \"blinded payload hash\""
@ -184,7 +182,7 @@ TEST_CASE("RequestMint::from_string", "[from_string]") {
REQUIRE(res.has_value()==true);
REQUIRE(res->message_reference==100003);
REQUIRE(res->transaction_reference == "b2221a58008a05a6c4647159c324c985");
REQUIRE(res->transaction_reference.to_string() == "b2221a58008a05a6c4647159c324c985");
/// \todo check blinds
// bad cases
@ -228,7 +226,7 @@ TEST_CASE("RequestRenew::from_string", "[from_string]") {
" \"blinds\": ["
" {"
" \"blinded_payload_hash\": "
"\"7ed0cda1c1b36f544514b12848b8436974b7b9f6c7...\","
"\"7ed0cda1c1b36f544514b12848b8436974b7b9f6c7231ebcc566678e3478d3279db03872e4710413ad20a55d56ef12fb1800ac187195322535a626e178931cf9\","
" \"mint_key_id\": \"f2864e5cd937dbaa4825e73a81062de162143682\","
" \"reference\": \"b0\","
" \"type\": \"blinded payload hash\""
@ -280,8 +278,7 @@ TEST_CASE("RequestRenew::from_string", "[from_string]") {
TEST_CASE("RequestResume::from_string", "[from_string]") {
// good case
auto res = RequestResume::from_string(
"{"
auto res = RequestResume::from_string( "{"
"\"message_reference\": 100005,"
"\"transaction_reference\": \"ad45f23d3b1a11df587fd2803bab6c39\","
"\"type\": \"request resume\""
@ -289,7 +286,7 @@ TEST_CASE("RequestResume::from_string", "[from_string]") {
REQUIRE(res.has_value()==true);
REQUIRE(res->message_reference==100005);
REQUIRE(res->transaction_reference == "ad45f23d3b1a11df587fd2803bab6c39");
REQUIRE(res->transaction_reference.to_string()=="ad45f23d3b1a11df587fd2803bab6c39");
// bad cases
res = RequestResume::from_string("");

37
test/test_big_int.cpp Normal file
View File

@ -0,0 +1,37 @@
#include "big_int.hpp"
#include <catch2/catch_test_macros.hpp>
TEST_CASE("BigInt::from_string", "[big_int]") {
std::string VALID [] = {
"1",
"12",
"123",
"1234",
"12345",
"123456",
"120456",
"123056",
"120345",
"1234560abc",
"aabbcc",
"abcdef1"
};
for (size_t i= 0; i<sizeof(VALID)/sizeof(VALID[0]);i++) {
auto b = BigInt::from_string(VALID[i]);
REQUIRE(b->to_string() == VALID[i]);
REQUIRE(b.has_value());
}
auto invalid_hex = "aabbcc..";
{
auto b = BigInt::from_string(invalid_hex);
REQUIRE(!b);
}
}
TEST_CASE("BigInt::from_int", "[big_int]") {
auto b = BigInt::from_int(0xaabbccdd);
REQUIRE(b.to_string()=="aabbccdd");
}