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use first 4 bits as type for address
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package conflux.web3j.types; | ||
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| import java.util.Optional; | ||
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| import org.web3j.utils.Numeric; | ||
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| public class Address { | ||
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| private static final int HEX_LENGTH_WITH_PREFIX = 42; | ||
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| public static void validate(String hexValue) throws AddressException { | ||
| validate(hexValue, null); | ||
| } | ||
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| public static void validate(String hexValue, AddressType expectedType) throws AddressException { | ||
| if (!Numeric.containsHexPrefix(hexValue)) { | ||
| throw AddressException.INVALID_PREFIX; | ||
| } | ||
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| if (hexValue.length() != HEX_LENGTH_WITH_PREFIX) { | ||
| throw AddressException.INVALID_LENGTH; | ||
| } | ||
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| Optional<AddressType> type = AddressType.parse(hexValue.charAt(2)); | ||
| if (!type.isPresent()) { | ||
| throw AddressException.INVALID_TYPE; | ||
| } | ||
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| if (expectedType != null && !type.get().equals(expectedType)) { | ||
| throw expectedType.getTypeMismatchException(); | ||
| } | ||
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| for (int i = 2; i < HEX_LENGTH_WITH_PREFIX; i++) { | ||
| char ch = hexValue.charAt(i); | ||
| if (ch < '0' || (ch > '9' && ch < 'A') || (ch > 'Z' && ch < 'a') || ch > 'z') { | ||
| throw AddressException.INVALID_HEX; | ||
| } | ||
| } | ||
| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| package conflux.web3j.types; | ||
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| public class AddressException extends RuntimeException { | ||
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| private static final long serialVersionUID = 2338294090416527939L; | ||
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| public static final AddressException INVALID_PREFIX = new AddressException("HEX prefix 0x missed"); | ||
| public static final AddressException INVALID_LENGTH = new AddressException("wrong length"); | ||
| public static final AddressException INVALID_TYPE = new AddressException("wrong type"); | ||
| public static final AddressException INVALID_HEX = new AddressException("wrong HEX format"); | ||
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| private String reason; | ||
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| public AddressException() { | ||
| } | ||
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| public AddressException(String reason) { | ||
| super(String.format("invalid address (%s)", reason)); | ||
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| this.reason = reason; | ||
| } | ||
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| public String getReason() { | ||
| return reason; | ||
| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package conflux.web3j.types; | ||
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| import java.util.Optional; | ||
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| import org.web3j.utils.Numeric; | ||
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| public enum AddressType { | ||
| User('1', new AddressException("user address type required")), | ||
| Contract('8', new AddressException("contract address type required")); | ||
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| private char value; | ||
| private AddressException typeMismatchException; | ||
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| private AddressType(char value, AddressException ae) { | ||
| this.value = value; | ||
| this.typeMismatchException = ae; | ||
| } | ||
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| public char getValue() { | ||
| return this.value; | ||
| } | ||
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| public AddressException getTypeMismatchException() { | ||
| return typeMismatchException; | ||
| } | ||
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| public String normalize(String address) { | ||
| return String.format("0x%s%s", this.value, Numeric.cleanHexPrefix(address).substring(1)); | ||
| } | ||
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| public static Optional<AddressType> parse(char ch) { | ||
| for (AddressType type : AddressType.values()) { | ||
| if (type.value == ch) { | ||
| return Optional.of(type); | ||
| } | ||
| } | ||
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| return Optional.empty(); | ||
| } | ||
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| } |