chore: add commify

Signed-off-by: Tomás Migone <[email protected]>

Author: Maikol

packages/common-ts/src/attestations/attestations.ts

@@ -103,7 +103,9 @@ export const decodeAttestation = (attestationData: string): Attestation => {
     attestationBytes,
   )
   const sig = Signature.from(
-    hexlify(attestationBytes.slice(RECEIPT_SIZE_BYTES, RECEIPT_SIZE_BYTES + SIG_SIZE_BYTES))
+    hexlify(
+      attestationBytes.slice(RECEIPT_SIZE_BYTES, RECEIPT_SIZE_BYTES + SIG_SIZE_BYTES),
+    ),
   )
 
   return {

packages/common-ts/src/util/commify.ts

@@ -0,0 +1,14 @@
+import "ethers"
+
+function commify(value: string): string {
+  const match = value.match(/^(-?)([0-9]*)(\.?)([0-9]*)$/);
+  if (!match || (!match[2] && !match[4])) {
+    throw new Error(`bad formatted number: ${ JSON.stringify(value) }`);
+  }
+
+  const neg = match[1];
+  const whole = BigInt(match[2] || 0).toLocaleString("en-us");
+  const frac = match[4] ? (match[4].match(/^(.*?)0*$/)?.[1] || "0") : "0";
+
+  return `${ neg }${ whole }.${ frac }`;
+}