feat: signature message verification (#16)

espresso-cash · Feb 3, 2025 · 843605e · 843605e
1 parent 8d13b0d
commit 843605e
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Showing 7 changed files with 90 additions and 15 deletions.
diff --git a/dist/index.cjs b/dist/index.cjs
@@ -2076,17 +2076,40 @@ class BrijPartnerClient {
         }
         return decrypted;
     }
+    static currencyDecimals = {
+        // Crypto currencies
+        USDC: 6,
+        SOL: 9,
+        // Fiat currencies
+        USD: 2,
+        NGN: 2,
+    };
+    convertToDecimalPrecision(amount, currency) {
+        const decimals = BrijPartnerClient.currencyDecimals[currency];
+        if (decimals === undefined) {
+            throw new Error(`Unknown currency: ${currency}`);
+        }
+        return Math.round(amount * Math.pow(10, decimals)).toString();
+    }
     createUserOnRampMessage({ cryptoAmount, cryptoCurrency, fiatAmount, fiatCurrency, }) {
-        return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}`;
+        const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+        const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+        return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}`;
     }
     createUserOffRampMessage({ cryptoAmount, cryptoCurrency, fiatAmount, fiatCurrency, bankName, bankAccount, }) {
-        return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
+        const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+        const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+        return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
     }
     createPartnerOnRampMessage({ cryptoAmount, cryptoCurrency, fiatAmount, fiatCurrency, bankName, bankAccount, }) {
-        return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
+        const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+        const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+        return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
     }
     createPartnerOffRampMessage({ cryptoAmount, cryptoCurrency, fiatAmount, fiatCurrency, cryptoWalletAddress, }) {
-        return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}|${cryptoWalletAddress}`;
+        const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+        const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+        return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}|${cryptoWalletAddress}`;
     }
 }
 

diff --git a/dist/index.cjs.map b/dist/index.cjs.map
diff --git a/dist/index.d.ts b/dist/index.d.ts
@@ -131,6 +131,8 @@ declare class BrijPartnerClient {
     getUserInfo(publicKey: string): Promise<any>;
     getUserSecretKey(publicKey: string): Promise<string>;
     private decryptData;
+    private static readonly currencyDecimals;
+    private convertToDecimalPrecision;
     private createUserOnRampMessage;
     private createUserOffRampMessage;
     private createPartnerOnRampMessage;

diff --git a/dist/index.js b/dist/index.js
diff --git a/dist/index.js.map b/dist/index.js.map
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "brij-partner-sdk",
-  "version": "0.6.1",
+  "version": "0.6.2",
   "description": "",
   "main": "dist/index.cjs",
   "module": "dist/index.js",

diff --git a/src/index.ts b/src/index.ts
@@ -578,6 +578,25 @@ export class BrijPartnerClient {
     return decrypted;
   }
 
+  private static readonly currencyDecimals: Record<string, number> = {
+    // Crypto currencies
+    USDC: 6,
+    SOL: 9,
+    // Fiat currencies
+    USD: 2,
+    NGN: 2,
+  };
+
+  private convertToDecimalPrecision(amount: number, currency: string): string {
+    const decimals = BrijPartnerClient.currencyDecimals[currency];
+
+    if (decimals === undefined) {
+      throw new Error(`Unknown currency: ${currency}`);
+    }
+
+    return Math.round(amount * Math.pow(10, decimals)).toString();
+  }
+
   private createUserOnRampMessage({
     cryptoAmount,
     cryptoCurrency,
@@ -589,7 +608,9 @@ export class BrijPartnerClient {
     fiatAmount: number;
     fiatCurrency: string;
   }): string {
-    return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}`;
+    const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+    const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+    return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}`;
   }
 
   private createUserOffRampMessage({
@@ -607,7 +628,9 @@ export class BrijPartnerClient {
     bankName: string;
     bankAccount: string;
   }): string {
-    return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
+    const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+    const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+    return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
   }
 
   private createPartnerOnRampMessage({
@@ -625,7 +648,9 @@ export class BrijPartnerClient {
     bankName: string;
     bankAccount: string;
   }): string {
-    return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
+    const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+    const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+    return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}|${bankName}|${bankAccount}`;
   }
 
   private createPartnerOffRampMessage({
@@ -641,6 +666,8 @@ export class BrijPartnerClient {
     fiatCurrency: string;
     cryptoWalletAddress: string;
   }): string {
-    return `${cryptoAmount}|${cryptoCurrency}|${fiatAmount}|${fiatCurrency}|${cryptoWalletAddress}`;
+    const decimalCryptoAmount = this.convertToDecimalPrecision(cryptoAmount, cryptoCurrency);
+    const decimalFiatAmount = this.convertToDecimalPrecision(fiatAmount, fiatCurrency);
+    return `${decimalCryptoAmount}|${cryptoCurrency}|${decimalFiatAmount}|${fiatCurrency}|${cryptoWalletAddress}`;
   }
 }