+ // RSK - RSK functions - begin
+ function stripHexPrefix(address) {
+ if (typeof address !== "string") {
+ throw new Error("address parameter should be a string.");
+ }
+
+ var hasPrefix = (address.substring(0, 2) === "0x" ||
+ address.substring(0, 2) === "0X");
+
+ return hasPrefix ? address.slice(2) : address;
+ };
+
+ function toChecksumAddressForRsk(address, chainId = null) {
+ if (typeof address !== "string") {
+ throw new Error("address parameter should be a string.");
+ }
+
+ if (!/^(0x)?[0-9a-f]{40}$/i.test(address)) {
+ throw new Error("Given address is not a valid RSK address: " + address);
+ }
+
+ var stripAddress = stripHexPrefix(address).toLowerCase();
+ var prefix = chainId != null ? chainId.toString() + "0x" : "";
+ var keccakHash = libs.ethUtil.keccak256(prefix + stripAddress)
+ .toString("hex")
+ .replace(/^0x/i, "");
+ var checksumAddress = "0x";
+
+ for (var i = 0; i < stripAddress.length; i++) {
+ checksumAddress +=
+ parseInt(keccakHash[i], 16) >= 8 ?
+ stripAddress[i].toUpperCase() :
+ stripAddress[i];
+ }
+
+ return checksumAddress;
+ }
+
+ // RSK - RSK functions - end
+