fix: Gatsby support

Author: evan-gray

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 1.0.4
+
+### Fixed
+
+Gatsby support
+
 ## 1.0.3
 
 ### Fixed

package-lock.json

@@ -38,7 +38,6 @@
   "dependencies": {
     "@solana/web3.js": "^1.10.1",
     "assert": "^2.0.0",
-    "buffer": "^6.0.1",
-    "read-bigint": "^0.1.6"
+    "buffer": "^6.0.1"
   }
 }

package.json

@@ -1,6 +1,6 @@
-import { Buffer } from 'buffer'
-import { readBigInt64LE, readBigUInt64LE } from 'read-bigint'
 import { PublicKey } from '@solana/web3.js'
+import { Buffer } from 'buffer'
+import { readBigInt64LE, readBigUInt64LE } from './readBig'
 
 export const Magic = 0xa1b2c3d4
 export const Version1 = 1

src/index.ts

@@ -0,0 +1,57 @@
+import { Buffer } from 'buffer'
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/errors.js#L758
+const ERR_BUFFER_OUT_OF_BOUNDS = () => new Error('Attempt to access memory outside buffer bounds')
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/errors.js#L968
+const ERR_INVALID_ARG_TYPE = (name: string, expected: string, actual: any) =>
+  new Error(`The "${name}" argument must be of type ${expected}. Received ${actual}`)
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/errors.js#L1262
+const ERR_OUT_OF_RANGE = (str: string, range: string, received: number) =>
+  new Error(`The value of "${str} is out of range. It must be ${range}. Received ${received}`)
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/validators.js#L127-L130
+function validateNumber(value: any, name: string) {
+  if (typeof value !== 'number') throw ERR_INVALID_ARG_TYPE(name, 'number', value)
+}
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/buffer.js#L68-L80
+function boundsError(value: number, length: number) {
+  if (Math.floor(value) !== value) {
+    validateNumber(value, 'offset')
+    throw ERR_OUT_OF_RANGE('offset', 'an integer', value)
+  }
+
+  if (length < 0) throw ERR_BUFFER_OUT_OF_BOUNDS()
+
+  throw ERR_OUT_OF_RANGE('offset', `>= 0 and <= ${length}`, value)
+}
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/buffer.js#L129-L145
+export function readBigInt64LE(buffer: Buffer, offset = 0): bigint {
+  validateNumber(offset, 'offset')
+  const first = buffer[offset]
+  const last = buffer[offset + 7]
+  if (first === undefined || last === undefined) boundsError(offset, buffer.length - 8)
+  // tslint:disable-next-line:no-bitwise
+  const val = buffer[offset + 4] + buffer[offset + 5] * 2 ** 8 + buffer[offset + 6] * 2 ** 16 + (last << 24) // Overflow
+  return (
+    (BigInt(val) << BigInt(32)) + // tslint:disable-line:no-bitwise
+    BigInt(first + buffer[++offset] * 2 ** 8 + buffer[++offset] * 2 ** 16 + buffer[++offset] * 2 ** 24)
+  )
+}
+
+// https://github.com/nodejs/node/blob/v14.17.0/lib/internal/buffer.js#L89-L107
+export function readBigUInt64LE(buffer: Buffer, offset = 0): bigint {
+  validateNumber(offset, 'offset')
+  const first = buffer[offset]
+  const last = buffer[offset + 7]
+  if (first === undefined || last === undefined) boundsError(offset, buffer.length - 8)
+
+  const lo = first + buffer[++offset] * 2 ** 8 + buffer[++offset] * 2 ** 16 + buffer[++offset] * 2 ** 24
+
+  const hi = buffer[++offset] + buffer[++offset] * 2 ** 8 + buffer[++offset] * 2 ** 16 + last * 2 ** 24
+
+  return BigInt(lo) + (BigInt(hi) << BigInt(32)) // tslint:disable-line:no-bitwise
+}