feat: Basic support for H160 and H256 accounts.

src/middleware/validate/validateAddressMiddleware.spec.ts

@@ -78,6 +78,13 @@ describe('validateAddressMiddleware', () => {
 		},
 	} as unknown as Request);
 
+	doesNotErrorWith('a valid H160 address', {
+		params: {
+			number: '1',
+			address: '0xf24FF3a9CF04c71Dbc94D0b566f7A27B94566cac',
+		},
+	} as unknown as Request);
+
 	errorsWith(
 		'an address containing an invalid base58 char',
 		{
@@ -97,7 +104,7 @@ describe('validateAddressMiddleware', () => {
 				address: 'y9EMHt34JJo4rWLSaxoLGdYXvjgSXEd4zHUnQgfNzwES8b',
 			},
 		} as unknown as Request,
-		new BadRequest('Invalid decoded address length')
+		new BadRequest('Invalid encoded address length')
 	);
 
 	errorsWith(

src/middleware/validate/validateAddressMiddleware.ts

@@ -22,7 +22,7 @@ export const validateAddressMiddleware: RequestHandler = (req, _res, next) => {
 };
 
 /**
- * Verify that an address is a valid substrate ss58 address.
+ * Verify that an address is a valid substrate address.
  *
  * Note: this is very similar '@polkadot/util-crypto/address/checkAddress,
  * except it does not check the prefix.
@@ -35,11 +35,21 @@ function checkAddress(address: string): [boolean, string | undefined] {
 	try {
 		decoded = base58Decode(address);
 	} catch (error) {
+		// If ss58 doesn't pass, we try H160 address.
+		if (address.startsWith('0x')) {
+			decoded = Uint8Array.from(Buffer.from(address.slice(2), 'hex'));
+
+			if (decoded.length != 20) {
+				return [false, `Invalid decoded address length ${decoded.length} for H160 account`];
+			}
+
+			return [true, undefined];
+		}
 		return [false, (error as Error).message];
 	}
 
 	if (!defaults.allowedEncodedLengths.includes(decoded.length)) {
-		return [false, 'Invalid decoded address length'];
+		return [false, `Invalid encoded address length`];
 	}
 
 	const [isValid] = checkAddressChecksum(decoded);