fix: remove buffer

.changeset/remove-buffer-usage.md

@@ -0,0 +1,14 @@
+---
+"@evolution-sdk/evolution": patch
+---
+
+### Remove Buffer Usage from Source Code
+
+Replaced all `Buffer.from()` usage with `Bytes.fromHex()` and `Bytes.toHex()` from the core module for better cross-platform compatibility.
+
+**Files Updated:**
+- `TxBuilderImpl.ts` - Use `Bytes.toHex()` for key hash hex conversion in `buildFakeWitnessSet`
+- `Assets/index.ts` - Use `Bytes.fromHex()` for policy ID and asset name decoding
+- `MaestroEffect.ts` - Use `Bytes.fromHex()` for transaction CBOR conversion
+- `Ogmios.ts` - Use `Bytes.toHex()` for datum hash hex conversion
+- `KupmiosEffects.ts` - Use `Bytes.fromHex()` for datum hash and script bytes decoding

packages/evolution/src/core/Assets/index.ts

@@ -1,6 +1,7 @@
 import { Effect as Eff, Equal, FastCheck, Hash, Inspectable, ParseResult, Schema } from "effect"
 
 import * as AssetName from "../AssetName.js"
+import * as Bytes from "../Bytes.js"
 import * as CBOR from "../CBOR.js"
 import * as Coin from "../Coin.js"
 import * as MultiAsset from "../MultiAsset.js"
@@ -107,12 +108,12 @@ export const fromUnit = (
     const assetNameHex = dotIndex === -1 ? "" : unit.slice(dotIndex + 1)
 
     // Decode policy ID from hex (28 bytes = 56 hex chars)
-    const policyIdBytes = new Uint8Array(Buffer.from(policyIdHex, "hex"))
+    const policyIdBytes = Bytes.fromHex(policyIdHex)
     const policyId = new PolicyId.PolicyId({ hash: policyIdBytes })
 
     // Decode asset name from hex (empty string yields empty bytes)
     const assetNameBytes = assetNameHex 
-      ? new Uint8Array(Buffer.from(assetNameHex, "hex"))
+      ? Bytes.fromHex(assetNameHex)
       : new Uint8Array(0)
     const assetName = new AssetName.AssetName({ bytes: assetNameBytes })
 

packages/evolution/src/sdk/builders/TxBuilderImpl.ts

@@ -5,6 +5,7 @@ import type * as Array from "effect/Array"
 // Core imports
 import type * as CoreAddress from "../../core/Address.js"
 import * as CoreAssets from "../../core/Assets/index.js"
+import * as Bytes from "../../core/Bytes.js"
 import * as Bytes32 from "../../core/Bytes32.js"
 import * as PlutusData from "../../core/Data.js"
 import * as DatumOption from "../../core/DatumOption.js"
@@ -825,7 +826,7 @@ export const buildFakeWitnessSet = (
     for (const utxo of inputUtxos) {
       const keyHash = extractPaymentKeyHashFromCore(utxo.address)
       if (keyHash) {
-        const keyHashHex = Buffer.from(keyHash).toString("hex")
+        const keyHashHex = Bytes.toHex(keyHash)
         if (!keyHashesSet.has(keyHashHex)) {
           keyHashesSet.add(keyHashHex)
           keyHashes.push(keyHash)
@@ -854,7 +855,7 @@ export const buildFakeWitnessSet = (
             // Fill with unique pattern: 0xFF prefix + counter to distinguish from real keys
             dummyKeyHash[0] = 0xFF
             dummyKeyHash[1] = (keyHashesSet.size + i) & 0xFF
-            const dummyHashHex = Buffer.from(dummyKeyHash).toString("hex")
+            const dummyHashHex = Bytes.toHex(dummyKeyHash)
 
             // Only add if not already in the set
             if (!keyHashesSet.has(dummyHashHex)) {

packages/evolution/src/sdk/provider/internal/KupmiosEffects.ts

@@ -1,6 +1,7 @@
 import { FetchHttpClient } from "@effect/platform"
 import { Array as _Array, Effect, pipe, Schedule, Schema } from "effect"
 
+import * as Bytes from "../../../core/Bytes.js"
 import * as CoreAddress from "../../../core/Address.js"
 import * as CoreAssets from "../../../core/Assets/index.js"
 import * as PlutusData from "../../../core/Data.js"
@@ -89,7 +90,7 @@
           Effect.catchAll((cause) => new ProviderError({ cause, message: "Failed to retrieve datum" }))
         )
       } else if (datum_type === "hash" && datum_hash) {
-        const hashBytes = new Uint8Array(Buffer.from(datum_hash, "hex"))
+        const hashBytes = Bytes.fromHex(datum_hash)
         return new DatumOption.DatumHash({ hash: hashBytes })
       }
 
@@ -121,7 +122,7 @@
                 break
             }
             // Convert hex script to bytes and wrap in ScriptRef
-            const scriptBytes = new Uint8Array(Buffer.from(encodedScript, "hex"))
+            const scriptBytes = Bytes.fromHex(encodedScript)
             return new ScriptRef.ScriptRef({ bytes: scriptBytes })
           }),
           Effect.catchAll((cause) => new ProviderError({ cause, message: "Failed to get script" }))

packages/evolution/src/sdk/provider/internal/MaestroEffect.ts

@@ -3,8 +3,9 @@
  * Internal module implementing curry pattern with rate limiting
  */
 
 import { Effect, Schema } from "effect"
 
+import * as Bytes from "../../../core/Bytes.js"
 import * as CoreAddress from "../../../core/Address.js"
 import type * as CoreUTxO from "../../../core/UTxO.js"
 import type * as Credential from "../../Credential.js"
@@ -169,7 +170,7 @@
     const endpoint = turboSubmit ? "/turbo/submit" : "/submit"
 
     // Convert hex string to Uint8Array for submission
-    const txBytes = new Uint8Array(Buffer.from(cbor, "hex"))
+    const txBytes = Bytes.fromHex(cbor)
 
     const response = yield* HttpUtils.postUint8Array(
       `${baseUrl}${endpoint}`,

packages/evolution/src/sdk/provider/internal/Ogmios.ts

@@ -1,6 +1,7 @@
 import type { Record } from "effect"
 import { Schema } from "effect"
 
+import * as Bytes from "../../../core/Bytes.js"
 import * as CoreAddress from "../../../core/Address.js"
 import * as AssetName from "../../../core/AssetName.js"
 import type * as CoreAssets from "../../../core/Assets/index.js"
@@ -185,7 +186,7 @@
   const toOgmiosDatum = (datumOption: DatumOption.DatumOption | undefined): { datumHash?: string; datum?: string } => {
     if (!datumOption) return {}
     if (datumOption._tag === "DatumHash") {
-      return { datumHash: Buffer.from(datumOption.hash).toString("hex") }
+      return { datumHash: Bytes.toHex(datumOption.hash) }
     }
     if (datumOption._tag === "InlineDatum") {
       // Convert PlutusData to hex CBOR