feat: support WIF for Bitcoin, Litecoin and Decred

[aeitwoen]

WIF should work across Bitcoin, Litecoin and Decred, not stop at a configurable Bitcoin prefix. encodeWIF and decodeWIF now cover all three native formats, checked against Bitcoinjs, Litecoin Core and dcrd vectors.

[coldtea-pr-lens]

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🟢 +1 new · 🟠 ~4 changed · 🔴 -0 removed · 2 flows · 8 files · commit 765846f

Architecture

5 components touched across 6 lanes.

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Inside the changed components — 2 views

Component view — Agent WIF tools

Integration of WIF encoding and decoding tools across MCP and Pi agent interfaces via shared executors

Component view — WIF conversion engine

WIF serialization, Base58Check/BLAKE-256 checksum verification, and secp256k1 scalar validation for Bitcoin, Litecoin, and Decred

Data flow

Encoding a private key as WIF via MCP · Decoding WIF and deriving wallet

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The other flows — 1 sequence

Decoding WIF and deriving wallet

Drill down

Client Interfaces — 3 components

🟡 CHANGED MCP Server

Exposes keys capabilities as MCP tools over stdio, now including keys_encode_wif and keys_decode_wif.

• src/mcp.ts:1-487

🟡 CHANGED Pi Coding Agent Extension

Pi coding agent extension registering keys tools, now expanded to 15 tools with WIF conversion support.

• packages/pi/extensions/keys.ts:1-523

🟡 CHANGED Public Library API

Public library exports exposing encodeWIF and decodeWIF functions and associated types alongside blockchain and HD utilities.

• src/index.ts:1-37
• src/types.ts:1-205

Tool Operations — 1 component

🟡 CHANGED Tool Operations Dispatcher

Shared tool executors and validation schemas for MCP and Pi agent transports, implementing encodeWif and decodeWif.

• src/tool-operations.ts:1-801
• src/tool-parameters.ts:1-71
• src/tool-schemas.ts:1-46

Derivation ＆ Mnemonics — 1 component

🟢 NEW WIF Converter

Encodes and decodes WIF private keys for Bitcoin, Litecoin, and Decred with checksum verification, network prefix handling, and secp256k1 scalar validation.

• src/utils/wif.ts:1-171

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