bip_hd: a minimal, easy-to-use BIP-32/BIP-44 implementation

- this is a work in progress, only a few coins are currently supported

Testing:

    $ test/unit_tests.py -v bip_hd

Examples:

    $ PYTHONPATH=. examples/bip_hd.py

scripts/create-bip-hd-chain-params.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+
+import json
+
+from bip_utils.slip.slip44 import Slip44
+from bip_utils.bip.conf.bip44.bip44_conf import Bip44Conf
+from bip_utils.bip.conf.bip49.bip49_conf import Bip49Conf
+from bip_utils.bip.conf.bip84.bip84_conf import Bip84Conf
+from bip_utils.bip.conf.bip86.bip86_conf import Bip86Conf
+
+import script_init
+from mmgen.cfg import Config
+from mmgen.main import launch
+
+opts_data = {
+	'text': {
+		'desc': 'Aggregate bip_lib and SLIP-44 data into a bip_hd chainparams table',
+		'usage':'[opts] infile',
+		'options': """
+-h, --help               Print this help message.
+""",
+	'notes': """
+source: https://github.com/MetaMask/slip44/blob/main/slip44.json
+"""
+	}
+}
+
+cfg = Config(opts_data=opts_data)
+
+def curve_clsname_abbr(s):
+	return {
+		'Bip32Slip10Secp256k1':      'x',
+		'Bip32Slip10Ed25519':        'edw',
+		'Bip32Slip10Ed25519Blake2b': 'blk',
+		'Bip32Slip10Nist256p1':      'nist',
+		'Bip32KholawEd25519':        'khol',
+	}.get(s,s)
+
+fs2 = '{:5} {:2} {:16} {:8} {:8} {:6} {:8} {:8}'
+hdr2 = fs2.format('CURVE','NW','ADDR_CLS','VB_PRV','VB_PUB','VB_WIF','VB_ADDR','DFL_PATH')
+
+dfl_vb_prv = '0488ade4'
+dfl_vb_pub = '0488b21e'
+dfl_curve = 'secp'
+dfl_dfl_path = "0'/0/0"
+
+def get_bip_utils_data(bipnum,n):
+	name,v = bip_utils_data[bipnum][n]
+	#pexit(v.__dict__)
+	vb_prv = v.m_key_net_ver.m_priv_net_ver.hex()
+	vb_pub = v.m_key_net_ver.m_pub_net_ver.hex()
+	ap = v.m_addr_params
+	return fs2.format(
+		curve_clsname_abbr(v.m_bip32_cls.__name__),
+		'T' if v.m_is_testnet else 'm',
+		v.m_addr_cls.__name__.removesuffix('AddrEncoder'),
+		'x' if vb_prv == dfl_vb_prv else vb_prv,
+		'x' if vb_pub == dfl_vb_pub else vb_pub,
+		v.m_wif_net_ver.hex() if isinstance(v.m_wif_net_ver,bytes) else '-',
+		ap['net_ver'].hex() if 'net_ver' in ap else 'h:'+ap['hrp'] if 'hrp' in ap else 'spec' if ap else '-',
+		'x' if v.m_def_path == dfl_dfl_path else v.m_def_path,
+	)
+
+def gen():
+
+	def format_data(bipnum,n,sym,name):
+		return fs.format(
+			n,
+			sym if sym else '---',
+			get_bip_utils_data(bipnum,n) if bipnum else '-',
+			name if name else '---')
+
+	fs = '{:<6} {:6} {:1} {}'
+
+	yield f'[defaults]'
+	yield fs.format('IDX','CHAIN',hdr2,'NAME')
+	yield fs.format('0', '-', fs2.format(dfl_curve, '-', '-', dfl_vb_prv, dfl_vb_pub, '-', '-', dfl_dfl_path), '-')
+
+	yield f'\n[bip-44]'
+	yield fs.format('IDX','CHAIN',hdr2,'NAME')
+	for k,v in slip44_data.items():
+		if int(k) in bip_utils_data[44]:
+			yield format_data(44,int(k),v['symbol'],v['name'])
+
+	for bipnum in (49, 84, 86):
+		yield f'\n[bip-{bipnum}]'
+		yield fs.format('IDX','CHAIN',hdr2,'NAME')
+		for n,v in sorted(bip_utils_data[bipnum].items()):
+			nd = v[1].m_coin_names
+			yield format_data(bipnum,n,nd.m_abbr,nd.m_name)
+
+	yield f'\n[bip-44-unsupported]'
+	yield fs.format('IDX','CHAIN','','NAME')
+	for k,v in slip44_data.items():
+		if not int(k) in bip_utils_data[44]:
+			yield format_data(None,int(k),v['symbol'],v['name'])
+
+def main():
+
+	global slip44_data, bip_utils_data
+
+	if len(cfg._args) != 1:
+		cfg._opts.usage()
+
+	with open(cfg._args[0]) as fh:
+		slip44_data = json.loads(fh.read())
+
+	bip_utils_data = {
+		n:{v.m_coin_idx:(k,v) for k,v in globals()[f'Bip{n}Conf'].__dict__.items() if not k.startswith('_')}
+			for n in (44, 49, 84, 86)
+	}
+
+	print('\n'.join(gen()))
+
+launch(func=main)