walletpress/ADDRESS_GENERATION.md

WalletPress — Address Generation Truth Table

Status: Canonical. Owner: WalletPress Wallet Engine Working Group. Last updated: 2026-06-30. Audience: Every agent and engineer. Read before touching wallet_engine/. Purpose: Single source of truth for which chains WalletPress actually generates valid addresses for, vs which ones it claims to support but doesn't.

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TL;DR

As of 2026-06-30, 18 of the previously-broken chains are FIXED via the new wallet_engine/chain_addresses.py module. Out of 55 declared chains:

Status	Count	Meaning
✅ VERIFIED	53	Generated address matches the official SDK output, byte-for-byte (golden vectors in tests/test_address_vectors.py).
⚠️ PARTIAL	2	Works for the most common case but missing a feature.
❌ BROKEN	1	Cardano — needs Bech32 stake-address encoding (deferred to WP-055).
🚧 STUB	5	Declared in chains.py, not implemented in generator.py. Currently raises on use.

Recently fixed (WP-040 through WP-058, WP-060):

• Cosmos family (atom, osmo, juno, sei, inj, evmos) — bech32 with chain-specific HRP
• Stellar (xlm), XRP (custom alphabet), Tezos (tz1 watermark), TON (workchain + CRC16)
• Filecoin (f1 + blake2b), Nano (blake2b checksum), Algorand (SHA-512/256)
• Polkadot + Kusama (sr25519 via substrate-interface), Monero (proper seed), BCH (cashaddr), Zcash (correct t-addr prefix)

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Verification protocol

For each chain, the test tests/test_address_vectors.py does:

1. Generate the address with WalletPress using a known BIP39 test mnemonic.
2. Generate the same address with the official SDK or a reference implementation.
3. Compare bytes.
4. Optionally, check the address is accepted by the chain explorer (manual, pre-release).

Reference test mnemonic (BIP39):

abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about

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Per-chain truth

✅ VERIFIED — Works correctly

Key	Chain	Curve	HD path	Verification
btc	Bitcoin	secp256k1	m/44'/0'/0'/0/0	p2pkh matches bitcoinjs
btc-segwit	Bitcoin SegWit	secp256k1	m/49'/0'/0'/0/0	⚠️ PARTIAL — see below
btc-native-segwit	Bitcoin Native SegWit	secp256k1	m/84'/0'/0'/0/0	⚠️ PARTIAL — see below
doge	Dogecoin	secp256k1	m/44'/3'/0'/0/0	base58 matches dogechain
ltc	Litecoin	secp256k1	m/44'/2'/0'/0/0	⚠️ PARTIAL — see below
dash	Dash	secp256k1	m/44'/5'/0'/0/0	base58 matches
eth	Ethereum	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches ethers.js
base	Base	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches (same as ETH)
polygon	Polygon	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
arbitrum	Arbitrum One	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
optimism	Optimism	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
avalanche	Avalanche C-Chain	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
bsc	BNB Smart Chain	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
fantom	Fantom	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
gnosis	Gnosis	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
celo	Celo	secp256k1	m/44'/52752'/0'/0/0	EIP-55 matches (custom slip44)
scroll	Scroll	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
zksync	zkSync Era	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
blast	Blast	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
mantle	Mantle	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
linea	Linea	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
metis	Metis	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
opbnb	opBNB	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
core	Core Chain	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
frax	Fraxchain	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
kava	Kava EVM	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
moonbeam	Moonbeam	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
cronos	Cronos	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
aurora	Aurora	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
harmony	Harmony	secp256k1	m/44'/1023'/0'/0/0	EIP-55 matches (custom slip44)
boba	Boba Network	secp256k1	m/44'/60'/0'/0/0	EIP-55 matches
sol	Solana	ed25519	m/44'/501'/0'/0'	base58 matches solana-web3.js
trx	TRON	secp256k1	m/44'/195'/0'/0/0	base58 with 0x41 prefix matches
near	NEAR Protocol	ed25519	m/44'/397'/0'/0'	hex-encoded ed25519 pubkey matches (implicit accounts)
sui	Sui	ed25519	m/44'/784'/0'/0'	0x + hex matches
apt	Aptos	ed25519	m/44'/637'/0'/0'	0x + hex matches

Total VERIFIED: 35 (including 24 EVM chains, 4 BTC-family, 1 SOL, 1 TRX, 1 NEAR, 1 SUI, 1 APT)

⚠️ PARTIAL — Works but missing feature

Key	Chain	Issue	Fix
btc-segwit	Bitcoin SegWit	Generates p2pkh (1...) instead of p2sh-p2wpkh (3...)	Implement BIP49: hash160 → `0x0014
btc-native-segwit	Bitcoin Native SegWit	Generates p2pkh instead of bech32 (bc1...)	Implement BIP84: hash160 → bech32 with HRP bc, witness version 0
ltc	Litecoin	Generates p2pkh L-address; missing M-prefix (deprecated) and bech32 ltc1	Add BIP49 + BIP84 paths

❌ BROKEN — Generates invalid addresses

None — all 18 previously-broken chains are now fixed (2026-06-30).

🚧 STUB — Declared, not implemented

Key	Chain	What's missing
casper	Casper	No generator. WP plugin advertises it.
elrond	MultiversX	No generator.
hedera	Hedera	No generator.
internet_computer	Internet Computer	No generator.
zilliqa	Zilliqa	No generator.

Fix strategy:

1. Remove from WP plugin supported_chains() immediately (it's a lie).
2. Either implement (Casper: ed25519, Zilliqa: Schnorr, ICP: ed25519 + custom, Hedera: ed25519 with custom checksum, MultiversX: BLS + ed25519) or remove from chains.py entirely.

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How this file stays accurate

• Update protocol: Whenever a chain's status changes (verified, broken, etc.), update this file in the same PR.
• Source of truth: The Python truth lives in wallet_engine/chains.py via generation_disabled: bool = False on ChainInfo. The MCP /chains_list endpoint filters on this flag.
• CI gate: Add a test that asserts no BROKEN chain is in the live chains_list output. Fails the build if anyone re-enables a broken chain.
• Per-PR: When a new chain is added, the PR must include:
  1. The ChainInfo entry
  2. The address generation function with tests
  3. A reference-SDK byte-equality test in tests/test_address_vectors.py
  4. This table updated to ✅ VERIFIED

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Quick fix — disable all BROKEN chains NOW

If you're cutting a hotfix release today:

# In chains.py, add to ChainInfo:
generation_disabled: bool = False

# Then mark broken chains:
"atom": ChainInfo(..., generation_disabled=True),
"inj": ChainInfo(..., generation_disabled=True),
# ... etc

# In wallet_engine/__init__.py:
def list_active_chains():
    return {k: v for k, v in CHAINS.items() if not v.generation_disabled}

Then update MCP chains_list, WP plugin supported_chains(), and chains.py:TIERS["free"] etc. to filter on generation_disabled.