package com.baidu.xuper;
import java.math.BigInteger;
import java.util.Arrays;
import com.baidu.xuper.Context;
import com.baidu.xuper.Contract;
import com.baidu.xuper.ContractMethod;
import com.baidu.xuper.Driver;
import com.baidu.xuper.Response;
/**
* Erc20
*
*/
public class Erc20 implements Contract
{
static final String BALANCEPRE = "balanceOf_";
static final String ALLOWANCEPRE = "allowanceOf_";
static final String MASTERPRE = "owner";
static final String TOTALSUPPLY = "totalSupply";
@Override
@ContractMethod
public Response initialize(Context ctx) {
String caller = ctx.caller();
if (caller.isEmpty()){
return Response.error("missing caller");
}
byte[] totalSupplyByte = ctx.args().get("totalSupply");
if (totalSupplyByte == null) {
return Response.error("missing totalSupply");
}
String totalSupplyStr = new String(totalSupplyByte);
BigInteger totalSupply = new BigInteger(totalSupplyStr);
if (totalSupply.signum() == -1) {
return Response.error("totalSupply must not be negative");
}
String balanceKey = BALANCEPRE + caller;
ctx.putObject(TOTALSUPPLY.getBytes(), totalSupply.toByteArray());
ctx.putObject(balanceKey.getBytes(), totalSupply.toByteArray());
ctx.putObject(MASTERPRE.getBytes(), caller.getBytes());
return Response.ok("initialize success".getBytes());
}
@ContractMethod
public Response mint(Context ctx) {
String caller = ctx.caller();
if (caller.isEmpty()){
return Response.error("missing caller");
}
byte[] ownerByte = ctx.getObject(MASTERPRE.getBytes());
if (ownerByte == null) {
return Response.error("no owner found");
}
if (!Arrays.equals(caller.getBytes(), ownerByte)){
return Response.error("only the person who created the contract can mint");
}
byte[] increaseSupplyByte = ctx.args().get("amount");
if (increaseSupplyByte == null) {
return Response.error("missing increaseSupply");
}
String increaseSupplyStr = new String(increaseSupplyByte);
BigInteger increaseSupply = new BigInteger(increaseSupplyStr);
if (increaseSupply.signum() == -1) {
return Response.error("amount must not be negative");
}
byte[] totalSupplyByte = ctx.getObject(TOTALSUPPLY.getBytes());
if (totalSupplyByte == null) {
return Response.error("no totalSupply found");
}
BigInteger totalSupply = new BigInteger(totalSupplyByte);
BigInteger totalSupplyNow = totalSupply.add(increaseSupply);
ctx.putObject(TOTALSUPPLY.getBytes(), totalSupplyNow.toByteArray());
String balanceKey = BALANCEPRE + caller;
byte[] callerBalanceByte = ctx.getObject(balanceKey.getBytes());
if (callerBalanceByte == null) {
return Response.error("no caller found");
}
BigInteger callerBalance = new BigInteger(callerBalanceByte);
BigInteger callerBalanceNow = callerBalance.add(increaseSupply);
ctx.putObject(balanceKey.getBytes(), callerBalanceNow.toByteArray());
return Response.ok("mint success".getBytes());
}
@ContractMethod
public Response totalSupply(Context ctx) {
byte[] value = ctx.getObject(TOTALSUPPLY.getBytes());
if (value == null) {
return Response.error("key TOTALSUPPLY not found)");
}
BigInteger totalSupply = new BigInteger(value);
return Response.ok(totalSupply.toString().getBytes());
}
@ContractMethod
public Response balance(Context ctx) {
byte[] accountByte = ctx.args().get("account");
if (accountByte == null) {
return Response.error("missing account");
}
String account = new String(accountByte);
String balanceKey = BALANCEPRE + account;
byte[] value = ctx.getObject(balanceKey.getBytes());
if (value == null) {
return Response.error("key " + account + " not found");
}
BigInteger balance = new BigInteger(value);
return Response.ok(balance.toString().getBytes());
}
@ContractMethod
public Response allowance(Context ctx) {
byte[] fromByte = ctx.args().get("from");
if (fromByte == null) {
return Response.error("missing from");
}
String from = new String(fromByte);
byte[] toByte = ctx.args().get("to");
if (toByte == null) {
return Response.error("missing to");
}
String to = new String(toByte);
String allowanceKey = ALLOWANCEPRE + from + "_" + to;
byte[] value = ctx.getObject(allowanceKey.getBytes());
if (value == null) {
return Response.error("key " + allowanceKey + " not found");
}
BigInteger allowance = new BigInteger(value);
return Response.ok(allowance.toString().getBytes());
}
@ContractMethod
public Response owner(Context ctx) {
byte[] ownerByte = ctx.getObject(MASTERPRE.getBytes());
if (ownerByte == null) {
return Response.error("no owner found");
}
return Response.ok(ownerByte);
}
@ContractMethod
public Response transfer(Context ctx) {
String from = ctx.caller();
if (from.isEmpty()){
return Response.error("missing from");
}
byte[] toByte = ctx.args().get("to");
if (toByte == null) {
return Response.error("missing to");
}
String to = new String(toByte);
byte[] tokenByte = ctx.args().get("token");
if (tokenByte == null) {
return Response.error("missing token");
}
String tokenAmountStr = new String(tokenByte);
BigInteger tokenAmount = new BigInteger(tokenAmountStr);
if (tokenAmount.signum() == -1) {
return Response.error("token must not be negative");
}
String fromKey = BALANCEPRE + from;
byte[] fromBalanceByte = ctx.getObject(fromKey.getBytes());
if (fromBalanceByte == null) {
return Response.error("no from found");
}
BigInteger fromBalance = new BigInteger(fromBalanceByte);
if (fromBalance.compareTo(tokenAmount) == -1){
return Response.error("no enough balance");
}
String toKey = BALANCEPRE + to;
byte[] toBalanceByte = ctx.getObject(toKey.getBytes());
BigInteger toBalance;
if (toBalanceByte == null) {
toBalance = BigInteger.valueOf(0);
} else {
toBalance = new BigInteger(toBalanceByte);
}
BigInteger fromBalanceNow = fromBalance.subtract(tokenAmount);
BigInteger toBalanceNow = toBalance.add(tokenAmount);
ctx.putObject(fromKey.getBytes(), fromBalanceNow.toByteArray());
ctx.putObject(toKey.getBytes(), toBalanceNow.toByteArray());
return Response.ok("transfer success".getBytes());
}
@ContractMethod
public Response transferFrom(Context ctx) {
String caller = ctx.caller();
if (caller.isEmpty()){
return Response.error("missing caller");
}
byte[] fromByte = ctx.args().get("from");
if (fromByte == null) {
return Response.error("missing from");
}
String from = new String(fromByte);
byte[] toByte = ctx.args().get("to");
if (toByte == null) {
return Response.error("missing to");
}
String to = new String(toByte);
byte[] tokenByte = ctx.args().get("token");
if (tokenByte == null) {
return Response.error("missing token");
}
String tokenAmountStr = new String(tokenByte);
BigInteger tokenAmount = new BigInteger(tokenAmountStr);
if (toke
基于C++核心语言的XuperChain底层区块链技术设计源码 （971个子文件） 
address 33B address 33B abi_test.bin 34KB xvm.c 10KB sum.c 8KB wasm2c.include.c 7KB opcode-code-table.c 1KB resolver.c 501B malloc.c 164B extern_func.c 124B add.c 99B trap.c 98B contract.pb.cc 483KB relayer.pb.cc 286KB wast-lexer-gen.cc 282KB wast-lexer-gen.cc 282KB interp.cc 101KB binary-reader.cc 78KB wast-parser.cc 72KB c-writer.cc 69KB tf.pb.cc 66KB binary-reader-interp.cc 60KB binary-reader-objdump.cc 55KB wat-writer.cc 53KB xrc01.pb.cc 53KB validator.cc 50KB spectest-interp.cc 41KB binary-reader-ir.cc 40KB binary-writer.cc 39KB binary-reader-logging.cc 30KB xuper_relayer.cc 26KB interp-trace.cc 23KB paillier.pb.cc 22KB type-checker.cc 22KB data_auth.pb.cc 21KB interp-disassemble.cc 19KB literal.cc 19KB xrc01.cc 17KB binary-writer-spec.cc 16KB ir.cc 16KB resolve-names.cc 16KB charity_demo.cc 13KB generate-names.cc 13KB anchor.pb.cc 13KB xrc01_exemple.cc 13KB apply-names.cc 13KB emscripten-helpers.cc 13KB data_auth.cc 12KB award_manage.cc 12KB opcode.cc 11KB expr-visitor.cc 11KB option-parser.cc 9KB leb128.cc 9KB game_assets.cc 9KB paillier.cc 8KB unified_check.cc 8KB binary-reader-opcnt.cc 8KB xpoa_validates.cc 8KB erc20.cc 8KB stream.cc 8KB wasm-interp.cc 7KB gas.cc 6KB string-view.cc 6KB trust_operators.cc 6KB source_trace.cc 6KB wasm-opcodecnt.cc 6KB wat2wasm.cc 5KB context_impl.cc 5KB group_chain.cc 5KB trust_counter.cc 5KB wasm2wat.cc 5KB luck_draw.cc 5KB wasm2c.cc 5KB wast2json.cc 5KB lexer-source-line-finder.cc 5KB wasm-objdump.cc 5KB naming.cc 4KB score_record.cc 4KB move.cc 4KB error-formatter.cc 4KB wat-desugar.cc 4KB token.cc 4KB short_content.cc 4KB hash_deposit.cc 3KB common.cc 3KB wasm-strip.cc 3KB wasm-validate.cc 3KB anchor.cc 3KB utf8.cc 3KB builtin_types.cc 3KB binding-hash.cc 3KB identity.cc 3KB features.cc 2KB crypto.cc 2KB basic_iterator.cc 2KB lexer-source.cc 2KB syscall.cc 2KB color.cc 2KB filenames.cc 2KB config.cc 1KB共 971 条
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