orquestra-tx-builder

Orquestra TX Builder

Transaction construction skill. Uses ONLY Orquestra MCP’s build_instruction tool to produce a base64-encoded wire transaction (Solana RPC standard, encoding: "base64").

Constraints

• ONLY use Orquestra MCP tool: build_instruction
• DO NOT call build_instruction with placeholder or guessed values
• DO NOT search programs or derive PDAs — use upstream research results
• DO NOT sign or send — hand off to orquestra-signer

Pre-Build Checklist

All items must be confirmed before calling build_instruction:

• program_id — exact base58 program address
• instruction_name — exact instruction name from Orquestra
• All required accounts — base58 addresses with signer/writable flags
• All required arguments — values with correct types (u64, Pubkey, etc.)
• fee_payer — wallet pubkey that pays the transaction fee

If ANY item is missing:

• Missing account → ask user to run orquestra-pda-explorer first, or ask for exact address
• Missing argument → ask for the argument name and its expected type
• NEVER proceed with unknowns

Output Format

Pre-Build Summary

Program:      <name> (<program_id>)
Instruction:  <instruction_name>
Fee Payer:    <pubkey>

Accounts:
  [0] authority   <pubkey>  signer=true  writable=false
  [1] vault        <pubkey>  signer=false writable=true

Arguments:
  amount: 1500000000  (u64, lamports)

Unsigned Transaction (base64 wire format)

Encoding:  base64
Wire TX:   <base64_encoded_wire_tx>

Solana wire-format transaction serialized as base64. Submit to RPC with encoding: "base64" in the request body.

RPC submission header (for manual use)

Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "sendTransaction",
  "params": [
    "<base64_encoded_wire_tx>",
    { "encoding": "base64", "preflightCommitment": "confirmed" }
  ]
}

Next Step “Pass this base64 wire transaction to orquestra-signer to sign and send.”