org.fisco.bcos.sdk.abi.tools.TopicTools Maven / Gradle / Ivy
package org.fisco.bcos.sdk.abi.tools;
import java.math.BigInteger;
import org.fisco.bcos.sdk.abi.TypeEncoder;
import org.fisco.bcos.sdk.abi.datatypes.Bytes;
import org.fisco.bcos.sdk.crypto.CryptoSuite;
import org.fisco.bcos.sdk.utils.AddressUtils;
import org.fisco.bcos.sdk.utils.Numeric;
public class TopicTools {
public static final int MAX_NUM_TOPIC_EVENT_LOG = 4;
public static final String LATEST = "latest";
private CryptoSuite cryptoSuite;
public TopicTools(CryptoSuite cryptoSuite) {
this.cryptoSuite = cryptoSuite;
}
public String integerToTopic(BigInteger i) {
return Numeric.toHexStringWithPrefixZeroPadded(i, 64);
}
public String boolToTopic(boolean b) {
if (b) {
return Numeric.toHexStringWithPrefixZeroPadded(BigInteger.ONE, 64);
} else {
return Numeric.toHexStringWithPrefixZeroPadded(BigInteger.ZERO, 64);
}
}
public String addressToTopic(String s) {
if (!AddressUtils.isValidAddress(s)) {
throw new IllegalArgumentException("invalid address");
}
return "0x000000000000000000000000" + Numeric.cleanHexPrefix(s);
}
public String stringToTopic(String s) {
byte[] hash = cryptoSuite.hash(s.getBytes());
return Numeric.toHexString(hash);
}
public String bytesToTopic(byte[] b) {
byte[] hash = cryptoSuite.hash(b);
return Numeric.toHexString(hash);
}
public String byteNToTopic(byte[] b) {
// byte[] can't be more than 32 byte
if (b.length > 32) {
throw new IllegalArgumentException("byteN can't be more than 32 byte");
}
Bytes bs = new Bytes(b.length, b);
return Numeric.prependHexPrefix(TypeEncoder.encode(bs));
}
}