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Author: spencer-xyz

README.md

@@ -155,17 +155,7 @@ Decrypts the given ciphertext using RSA-OAEP with the provided private key.
 
 ### Input text decryption/encryption and Signing
 
-### 1. `decryptValue(ctAmount: bigint, userKey: string)`
-
-Decrypts the given ciphertext amount using the user's key.
-
-- **Parameters**:
-    - `ctAmount`: Ciphertext amount in `bigint`.
-    - `userKey`: User's key in hexadecimal format.
-- **Returns**:
-    - Decrypted value as an integer.
-
-### 2. `sign(message: string, privateKey: string)`
+### 1. `sign(message: string, privateKey: string)`
 
 Signs the given message using the provided private key.
 
@@ -175,7 +165,7 @@ Signs the given message using the provided private key.
 - **Returns**:
     - Signature as a concatenation of `r`, `s`, and `v` values.
 
-### 3. `signInputText(wallet: BaseWallet, userKey: string, contractAddress: string , functionSelector: string, ct: Buffer)`
+### 2. `signInputText(wallet: BaseWallet, userKey: string, contractAddress: string , functionSelector: string, ct: Buffer)`
 
 Signs the given message using the provided private key.
 
@@ -188,7 +178,7 @@ Signs the given message using the provided private key.
 - **Returns**:
     - `signature`: The generated signature.
 
-### 4.`buildInputText(plaintext: bigint, sender: { wallet: BaseWallet; userKey: string }, contractAddress: string, functionSelector: string)`
+### 3.`buildInputText(plaintext: bigint, sender: { wallet: BaseWallet; userKey: string }, contractAddress: string, functionSelector: string)`
 
 Builds input text by encrypting the plaintext and signing it.
 **Parameters:**
@@ -203,7 +193,7 @@ Builds input text by encrypting the plaintext and signing it.
 - `intCipherText`: The integer representation of the ciphertext.
 - `signature`: The generated signature.
 
-### 5.`buildStringInputText((plaintext: string, sender: { wallet: BaseWallet; userKey: string }, contractAddress: string, functionSelector: string)`
+### 4.`buildStringInputText((plaintext: string, sender: { wallet: BaseWallet; userKey: string }, contractAddress: string, functionSelector: string)`
 
 Builds input text by encrypting the plaintext and signing it.
 **Parameters:**
@@ -218,6 +208,32 @@ Builds input text by encrypting the plaintext and signing it.
 - `intCipherText`: The integer representation of the ciphertext.
 - `signature`: The generated signature.
 
+### 5. `decryptUint(ciphertext: bigint, userKey: string)`
+
+Decrypts a value stored in a contract using a user key.
+
+**Parameters:**
+
+- `ciphertext`: The value to be decrypted.
+- `userKey`: The user's AES key.
+
+**Returns:**
+
+- `result`: The decrypted value.
+
+### 6. `decryptString(ciphertext: Array<bigint>, userKey: string)`
+
+Decrypts a value stored in a contract using a user key.
+
+**Parameters:**
+
+- `ciphertext`: The value to be decrypted.
+- `userKey`: The user's AES key.
+
+**Returns:**
+
+- `result`: The decrypted value.
+
 # ether_utils.ts
 
 This TypeScript library, `ethers_utils.ts`, provides ethers functionality to interact with the COTI-v2 network. Below is
@@ -365,33 +381,7 @@ Checks if the provided gas units are sufficient for the transaction.
 - `valid`: Boolean indicating if the gas units are sufficient.
 - `gas_estimate`: The estimated gas units.
 
-### 13. `decryptUint(ciphertext: bigint, userKey: string)`
-
-Decrypts a value stored in a contract using a user key.
-
-**Parameters:**
-
-- `ciphertext`: The value to be decrypted.
-- `userKey`: The user's AES key.
-
-**Returns:**
-
-- `result`: The decrypted value.
-
-### 14. `decryptString(ciphertext: Array<bigint>, userKey: string)`
-
-Decrypts a value stored in a contract using a user key.
-
-**Parameters:**
-
-- `ciphertext`: The value to be decrypted.
-- `userKey`: The user's AES key.
-
-**Returns:**
-
-- `result`: The decrypted value.
-
-### 15.`isProviderConnected(provider: Provider)`
+### 13.`isProviderConnected(provider: Provider)`
 
 Checks if the Web3 instance is connected.
 
@@ -403,7 +393,7 @@ Checks if the Web3 instance is connected.
 
 - `connected`: Boolean indicating if Web3 is connected.
 
-### 16. `getNativeBalance(address: string, provider: Provider)`
+### 14. `getNativeBalance(address: string, provider: Provider)`
 
 Retrieves the native balance of an address in Ether.
 

package-lock.json

@@ -11,8 +11,12 @@
     "build": "tsc"
   },
   "devDependencies": {
+    "@types/node-forge": "^1.3.11",
     "ethers": "^6.12.1",
     "ts-node": "^10.9.2",
     "typescript": "^5.4.5"
+  },
+  "dependencies": {
+    "node-forge": "^1.3.1"
   }
 }

package.json

@@ -1,7 +1,7 @@
 import {BaseWallet, Contract, Provider, Wallet} from "ethers"
-import {buildInputText} from "../crypto_utils"
+import {buildInputText, buildStringInputText, decryptString, decryptUint} from "../crypto_utils"
 import {onboard} from "./onboard"
-import {decryptUint, initEtherProvider} from "../ethers_utils";
+import {initEtherProvider} from "../ethers_utils";
 
 export class ConfidentialAccount {
     constructor(readonly wallet: BaseWallet, readonly userKey: string) {
@@ -20,7 +20,15 @@ export class ConfidentialAccount {
         return decryptUint(ciphertextValue, this.userKey)
     }
 
-    public encryptValue(plaintextValue: bigint | number, contractAddress: string, functionSelector: string) {
+    public decryptString(ciphertextValue: bigint[]) {
+        return decryptString(ciphertextValue, this.userKey)
+    }
+
+    public encryptUint(plaintextValue: bigint | number, contractAddress: string, functionSelector: string) {
         return buildInputText(BigInt(plaintextValue), this, contractAddress, functionSelector)
     }
+
+    public encryptString(plaintextValue: string, contractAddress: string, functionSelector: string) {
+        return buildStringInputText(plaintextValue, this, contractAddress, functionSelector)
+    }
 }

src/account/confidential-account.ts

@@ -10,15 +10,20 @@ export async function onboard(user: BaseWallet, contract = getDefaultContract(us
     const {publicKey, privateKey} = generateRSAKeyPair()
 
     const signedEK = sign(keccak256(publicKey), user.privateKey)
+
     const receipt = await (await contract.OnboardAccount(publicKey, signedEK, {gasLimit: 12000000})).wait()
+
     if (!receipt || !receipt.logs || !receipt.logs[0]) {
         throw new Error("failed to onboard account")
     }
+
     const decodedLog = contract.interface.parseLog(receipt.logs[0])
+
     if (!decodedLog) {
         throw new Error("failed to onboard account")
     }
-    const encryptedKey = decodedLog.args.userKey
-    const buf = Buffer.from(encryptedKey.substring(2), "hex")
-    return decryptRSA(privateKey, buf).toString("hex")
+
+    const encryptedKey = decodedLog.args.userKey.substring(2)
+
+    return decryptRSA(privateKey, encryptedKey)
 }