Review Script Template

Review and validate script template implementations in ts-templates for correctness and best practices.

When to Use

• Review a new template before merging
• Audit existing template implementations
• Validate template follows ts-templates patterns
• Check for common implementation errors

Review Checklist

Structure Validation

• File located in src/template/ appropriate subdirectory
• Implements ScriptTemplate interface from @bsv/sdk
• Exports PREFIX constant
• Exports Data interface with all protocol fields
• Default export is the template class
• Added to mod.ts exports (class + types)

Interface Requirements

• data property is public readonly
• Constructor accepts Data interface
• bitcomIndex?: number field for protocol position
• valid?: boolean field for verification status

Required Methods

Method	Purpose	Requirements
decode()	Static. Parse from BitComDecoded	Return array of instances
lock()	Generate LockingScript	Use BitCom for OP_RETURN protocols
unlock()	Generate UnlockingScript	Throw if not applicable
verify()	Check signature validity	Return boolean

Code Quality

• Uses script.chunks directly (no toASM().split())
• Uses @bsv/sdk Utils (no Buffer, TextEncoder)
• Proper error handling in decode()
• No hardcoded magic numbers
• Consistent with other templates in repo

Chunk Parsing Review

Correct pattern:

const script = Script.fromBinary(protocol.script)
const chunks = script.chunks
const field = Utils.toUTF8(chunks[0].data ?? [])

Incorrect patterns to flag:

// BAD: String splitting
const parts = script.toASM().split(' ')

// BAD: Buffer usage
const field = Buffer.from(chunks[0].data).toString()

// BAD: TextEncoder
new TextEncoder().encode(field)

Utils Usage Review

Verify correct Utils functions:

Operation	Correct	Incorrect
String → bytes	Utils.toArray(str, 'utf8')	Buffer.from(), TextEncoder
Bytes → string	Utils.toUTF8(bytes)	Buffer.toString(), TextDecoder
Bytes → hex	Utils.toHex(bytes)	Buffer.toString('hex')
Bytes → base64	Utils.toBase64(bytes)	Buffer.toString('base64')

Signature Verification Review

For protocols with signatures:

• Uses BSM.sign() for signing
• Tries all 4 recovery factors (0-3)
• Uses Signature.fromCompact() for decoding
• Verifies address matches recovered public key
• Sets valid field after verification

BitCom Integration Review

For OP_RETURN protocols:

• Uses BitCom class for lock()
• Creates Protocol array with correct structure
• Proper pipe delimiter handling
• decode() accepts BitComDecoded parameter

Common Issues

Issue 1: Missing Null Checks

// BAD: Can throw on missing data
const field = Utils.toUTF8(chunks[0].data)

// GOOD: Handle missing data
const field = Utils.toUTF8(chunks[0].data ?? [])

Issue 2: Wrong Chunk Index

Verify chunk indices match protocol specification:

• Check protocol documentation for field order
• Account for protocol prefix being separate

Issue 3: Incomplete Error Handling

// BAD: Crashes on parse error
static decode(bitcom: BitComDecoded): Protocol[] {
  const script = Script.fromBinary(protocol.script) // Can throw!
}

// GOOD: Handle parse errors
static decode(bitcom: BitComDecoded): Protocol[] {
  try {
    const script = Script.fromBinary(protocol.script)
  } catch {
    continue // Skip invalid protocols
  }
}

Issue 4: Missing mod.ts Export

Check that mod.ts includes:

export { default as Protocol, PREFIX } from './src/template/...'
export type { ProtocolData, ProtocolOptions } from './src/template/...'

Review Output Format

Provide structured feedback:

## Template Review: [TemplateName]

### Structure: ✅ PASS / ❌ FAIL
- [Details]

### Methods: ✅ PASS / ❌ FAIL
- [Details]

### Code Quality: ✅ PASS / ❌ FAIL
- [Details]

### Issues Found
1. [Issue description and fix]
2. [Issue description and fix]

### Recommendations
- [Optional improvements]

Additional Resources

Reference Files

• references/checklist-detailed.md - Extended validation criteria
• references/common-bugs.md - Known issues and fixes