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fix wasm erc20 contract #44

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fix wasm erc20 contract #44

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67 changes: 30 additions & 37 deletions example/erc20.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -57,14 +57,14 @@ DEFINE_METHOD(ERC20, mint) {
ctx->error("get totalSupply error");
return;
}

int increaseSupplyint = atoi(increaseSupply.c_str());
int valueint = atoi(value.c_str());
int totalSupplyint = increaseSupplyint + valueint;
char buf[32];
snprintf(buf, 32, "%d", totalSupplyint);
ctx->put_object("totalSupply", buf);
ctx->put_object("totalSupply", buf);

std::string key = BALANCEPRE + caller;
if (!ctx->get_object(key, &value)) {
ctx->error("get caller balance error");
Expand All @@ -73,8 +73,8 @@ DEFINE_METHOD(ERC20, mint) {
valueint = atoi(value.c_str());
int callerint = increaseSupplyint + valueint;
snprintf(buf, 32, "%d", callerint);
ctx->put_object(key, buf);
ctx->put_object(key, buf);

ctx->ok(buf);
}

Expand All @@ -90,12 +90,12 @@ DEFINE_METHOD(ERC20, totalSupply) {

DEFINE_METHOD(ERC20, balance) {
xchain::Context* ctx = self.context();
const std::string& caller = ctx->arg("caller");
const std::string& caller = ctx->initiator();
if (caller.empty()) {
ctx->error("missing caller");
return;
}

std::string key = BALANCEPRE + caller;
std::string value;
if (ctx->get_object(key, &value)) {
Expand All @@ -112,7 +112,7 @@ DEFINE_METHOD(ERC20, allowance) {
ctx->error("missing from");
return;
}

const std::string& to = ctx->arg("to");
if (to.empty()) {
ctx->error("missing to");
Expand All @@ -130,12 +130,8 @@ DEFINE_METHOD(ERC20, allowance) {

DEFINE_METHOD(ERC20, transfer) {
xchain::Context* ctx = self.context();
const std::string& from = ctx->arg("from");
if (from.empty()) {
ctx->error("missing from");
return;
}

const std::string& from = ctx->initiator();

const std::string& to = ctx->arg("to");
if (to.empty()) {
ctx->error("missing to");
Expand All @@ -153,11 +149,11 @@ DEFINE_METHOD(ERC20, transfer) {
std::string value;
int from_balance = 0;
if (ctx->get_object(from_key, &value)) {
from_balance = atoi(value.c_str());
from_balance = atoi(value.c_str());
if (from_balance < token) {
ctx->error("The balance of from not enough");
return;
}
}
} else {
ctx->error("key not found");
return;
Expand All @@ -168,11 +164,11 @@ DEFINE_METHOD(ERC20, transfer) {
if (ctx->get_object(to_key, &value)) {
to_balance = atoi(value.c_str());
}

from_balance = from_balance - token;
to_balance = to_balance + token;
char buf[32];

char buf[32];
snprintf(buf, 32, "%d", from_balance);
ctx->put_object(from_key, buf);
snprintf(buf, 32, "%d", to_balance);
Expand All @@ -188,8 +184,8 @@ DEFINE_METHOD(ERC20, transferFrom) {
ctx->error("missing from");
return;
}
const std::string& caller = ctx->arg("caller");

const std::string& caller = ctx->initiator();
if (caller.empty()) {
ctx->error("missing caller");
return;
Expand All @@ -212,11 +208,11 @@ DEFINE_METHOD(ERC20, transferFrom) {
std::string value;
int allowance_balance = 0;
if (ctx->get_object(allowance_key, &value)) {
allowance_balance = atoi(value.c_str());
allowance_balance = atoi(value.c_str());
if (allowance_balance < token) {
ctx->error("The allowance of from_to not enough");
return;
}
}
} else {
ctx->error("You need to add allowance from_to");
return;
Expand All @@ -225,11 +221,11 @@ DEFINE_METHOD(ERC20, transferFrom) {
std::string from_key = BALANCEPRE + from;
int from_balance = 0;
if (ctx->get_object(from_key, &value)) {
from_balance = atoi(value.c_str());
from_balance = atoi(value.c_str());
if (from_balance < token) {
ctx->error("The balance of from not enough");
return;
}
}
} else {
ctx->error("From no balance");
return;
Expand All @@ -240,12 +236,12 @@ DEFINE_METHOD(ERC20, transferFrom) {
if (ctx->get_object(to_key, &value)) {
to_balance = atoi(value.c_str());
}

from_balance = from_balance - token;
to_balance = to_balance + token;
allowance_balance = allowance_balance - token;

char buf[32];
char buf[32];
snprintf(buf, 32, "%d", from_balance);
ctx->put_object(from_key, buf);
snprintf(buf, 32, "%d", to_balance);
Expand All @@ -258,12 +254,12 @@ DEFINE_METHOD(ERC20, transferFrom) {

DEFINE_METHOD(ERC20, approve) {
xchain::Context* ctx = self.context();
const std::string& from = ctx->arg("from");
const std::string& from = ctx->initiator();
if (from.empty()) {
ctx->error("missing from");
return;
}

const std::string& to = ctx->arg("to");
if (to.empty()) {
ctx->error("missing to");
Expand All @@ -280,11 +276,11 @@ DEFINE_METHOD(ERC20, approve) {
std::string from_key = BALANCEPRE + from;
std::string value;
if (ctx->get_object(from_key, &value)) {
int from_balance = atoi(value.c_str());
int from_balance = atoi(value.c_str());
if (from_balance < token) {
ctx->error("The balance of from not enough");
return;
}
}
} else {
ctx->error("From no balance");
return;
Expand All @@ -293,17 +289,14 @@ DEFINE_METHOD(ERC20, approve) {
std::string allowance_key = ALLOWANCEPRE + from + "_" + to;
int allowance_balance = 0;
if (ctx->get_object(allowance_key, &value)) {
allowance_balance = atoi(value.c_str());
allowance_balance = atoi(value.c_str());
}

allowance_balance = allowance_balance + token;
char buf[32];

char buf[32];
snprintf(buf, 32, "%d", allowance_balance);
ctx->put_object(allowance_key, buf);

ctx->ok("approve success");
}