Here is a list of all files with brief descriptions:

[detail level 123456]

► src
► bench
addrman.cpp
base58.cpp
bech32.cpp
bench.cpp
bench.h
bench_bitcoin.cpp
block_assemble.cpp
ccoins_caching.cpp
chacha20.cpp
chacha_poly_aead.cpp
checkblock.cpp
checkqueue.cpp
coin_selection.cpp
crypto_hash.cpp
data.cpp
data.h
duplicate_inputs.cpp
examples.cpp
gcs_filter.cpp
hashpadding.cpp
lockedpool.cpp
mempool_eviction.cpp
mempool_stress.cpp
merkle_root.cpp
nanobench.cpp
nanobench.h
poly1305.cpp
prevector.cpp
rollingbloom.cpp
rpc_blockchain.cpp
rpc_mempool.cpp
util_time.cpp
verify_script.cpp
wallet_balance.cpp
► compat
assumptions.h
byteswap.h
cpuid.h
endian.h
glibc_compat.cpp
glibc_sanity.cpp
glibcxx_sanity.cpp
sanity.h
stdin.cpp
stdin.h
strnlen.cpp
► config
bitcoin-config.h
► consensus
consensus.h
merkle.cpp
merkle.h
params.h
tx_check.cpp
tx_check.h
tx_verify.cpp
tx_verify.h
validation.h
► crypto
► ctaes
bench.c
ctaes.c
ctaes.h
test.c
aes.cpp
aes.h
chacha20.cpp
chacha20.h
chacha_poly_aead.cpp
chacha_poly_aead.h
common.h
hkdf_sha256_32.cpp
hkdf_sha256_32.h
hmac_sha256.cpp
hmac_sha256.h
hmac_sha512.cpp
hmac_sha512.h
poly1305.cpp
poly1305.h
ripemd160.cpp
ripemd160.h
sha1.cpp
sha1.h
sha256.cpp
sha256.h
sha256_avx2.cpp
sha256_shani.cpp
sha256_sse4.cpp
sha256_sse41.cpp
sha3.cpp
sha3.h
sha512.cpp
sha512.h
siphash.cpp
siphash.h
► index
base.cpp
base.h
blockfilterindex.cpp
blockfilterindex.h
disktxpos.h
txindex.cpp
txindex.h
► interfaces
chain.cpp
chain.h
handler.cpp
handler.h
node.cpp
node.h
wallet.cpp
wallet.h
► logging
timer.h
► node
coin.cpp
coin.h
coinstats.cpp
coinstats.h
context.cpp
context.h
psbt.cpp
psbt.h
transaction.cpp
transaction.h
ui_interface.cpp
ui_interface.h
utxo_snapshot.h
► policy
feerate.cpp
feerate.h
fees.cpp
fees.h
policy.cpp
policy.h
rbf.cpp
rbf.h
settings.cpp
settings.h
► primitives
block.cpp
block.h
transaction.cpp
transaction.h
► qt
addressbookpage.cpp
addressbookpage.h
addresstablemodel.cpp
addresstablemodel.h
askpassphrasedialog.cpp
askpassphrasedialog.h
bantablemodel.cpp
bantablemodel.h
bitcoin.cpp
bitcoin.h
bitcoinaddressvalidator.cpp
bitcoinaddressvalidator.h
bitcoinamountfield.cpp
bitcoinamountfield.h
bitcoingui.cpp
bitcoingui.h
bitcoinstrings.cpp
bitcoinunits.cpp
bitcoinunits.h
clientmodel.cpp
clientmodel.h
coincontroldialog.cpp
coincontroldialog.h
coincontroltreewidget.cpp
coincontroltreewidget.h
createwalletdialog.cpp
createwalletdialog.h
csvmodelwriter.cpp
csvmodelwriter.h
editaddressdialog.cpp
editaddressdialog.h
guiconstants.h
guiutil.cpp
guiutil.h
intro.cpp
intro.h
macdockiconhandler.h
macdockiconhandler.mm
macnotificationhandler.h
macnotificationhandler.mm
macos_appnap.h
macos_appnap.mm
main.cpp
modaloverlay.cpp
modaloverlay.h
networkstyle.cpp
networkstyle.h
notificator.cpp
notificator.h
openuridialog.cpp
openuridialog.h
optionsdialog.cpp
optionsdialog.h
optionsmodel.cpp
optionsmodel.h
overviewpage.cpp
overviewpage.h
paymentserver.cpp
paymentserver.h
peertablemodel.cpp
peertablemodel.h
platformstyle.cpp
platformstyle.h
psbtoperationsdialog.cpp
psbtoperationsdialog.h
qrimagewidget.cpp
qrimagewidget.h
qvalidatedlineedit.cpp
qvalidatedlineedit.h
qvaluecombobox.cpp
qvaluecombobox.h
receivecoinsdialog.cpp
receivecoinsdialog.h
receiverequestdialog.cpp
receiverequestdialog.h
recentrequeststablemodel.cpp
recentrequeststablemodel.h
rpcconsole.cpp
rpcconsole.h
sendcoinsdialog.cpp
sendcoinsdialog.h
sendcoinsentry.cpp
sendcoinsentry.h
sendcoinsrecipient.h
signverifymessagedialog.cpp
signverifymessagedialog.h
splashscreen.cpp
splashscreen.h
trafficgraphwidget.cpp
trafficgraphwidget.h
transactiondesc.cpp
transactiondesc.h
transactiondescdialog.cpp
transactiondescdialog.h
transactionfilterproxy.cpp
transactionfilterproxy.h
transactionrecord.cpp
transactionrecord.h
transactiontablemodel.cpp
transactiontablemodel.h
transactionview.cpp
transactionview.h
utilitydialog.cpp
utilitydialog.h
walletcontroller.cpp
walletcontroller.h
walletframe.cpp
walletframe.h
walletmodel.cpp
walletmodel.h
walletmodeltransaction.cpp
walletmodeltransaction.h
walletview.cpp
walletview.h
winshutdownmonitor.cpp
winshutdownmonitor.h
► rpc
blockchain.cpp
blockchain.h
client.cpp
client.h
mining.cpp
mining.h
misc.cpp
net.cpp
protocol.h
rawtransaction.cpp
rawtransaction_util.cpp
rawtransaction_util.h
register.h
request.cpp
request.h
server.cpp
server.h
util.cpp
util.h
► script
bitcoinconsensus.cpp
bitcoinconsensus.h
descriptor.cpp
descriptor.h
interpreter.cpp
interpreter.h
keyorigin.h
script.cpp
script.h
script_error.cpp
script_error.h
sigcache.cpp
sigcache.h
sign.cpp
sign.h
signingprovider.cpp
signingprovider.h
standard.cpp
standard.h
► secp256k1
► contrib
lax_der_parsing.c
lax_der_parsing.h
lax_der_privatekey_parsing.c
lax_der_privatekey_parsing.h
► include
secp256k1.h
secp256k1_ecdh.h
secp256k1_extrakeys.h
secp256k1_preallocated.h
secp256k1_recovery.h
secp256k1_schnorrsig.h
► src
► modules
► ecdh
main_impl.h
tests_impl.h
► extrakeys
main_impl.h
tests_impl.h
► recovery
main_impl.h
tests_impl.h
► schnorrsig
main_impl.h
tests_impl.h
assumptions.h
basic-config.h
bench.h
bench_ecdh.c
bench_ecmult.c
bench_internal.c
bench_recover.c
bench_schnorrsig.c
bench_sign.c
bench_verify.c
ecdsa.h
ecdsa_impl.h
eckey.h
eckey_impl.h
ecmult.h
ecmult_const.h
ecmult_const_impl.h
ecmult_gen.h
ecmult_gen_impl.h
ecmult_impl.h
field.h
field_10x26.h
field_10x26_impl.h
field_5x52.h
field_5x52_asm_impl.h
field_5x52_impl.h
field_5x52_int128_impl.h
field_impl.h
gen_context.c
group.h
group_impl.h
hash.h
hash_impl.h
libsecp256k1-config.h
num.h
num_gmp.h
num_gmp_impl.h
num_impl.h
scalar.h
scalar_4x64.h
scalar_4x64_impl.h
scalar_8x32.h
scalar_8x32_impl.h
scalar_impl.h
scalar_low.h
scalar_low_impl.h
scratch.h
scratch_impl.h
secp256k1.c
selftest.h
testrand.h
testrand_impl.h
tests.c
tests_exhaustive.c
util.h
valgrind_ctime_test.c
► support
► allocators
secure.h
zeroafterfree.h
cleanse.cpp
cleanse.h
events.h
lockedpool.cpp
lockedpool.h
► univalue
► gen
gen.cpp
► include
univalue.h
► lib
univalue.cpp
univalue_escapes.h
univalue_get.cpp
univalue_read.cpp
univalue_utffilter.h
univalue_write.cpp
► test
no_nul.cpp
object.cpp
test_json.cpp
unitester.cpp
univalue-config.h
► util
asmap.cpp
asmap.h
bip32.cpp
bip32.h
bytevectorhash.cpp
bytevectorhash.h
check.h
error.cpp
error.h
fees.cpp
fees.h
golombrice.h
macros.h
memory.h
message.cpp
message.h
moneystr.cpp
moneystr.h
rbf.cpp
rbf.h
ref.h
settings.cpp
settings.h
spanparsing.cpp
spanparsing.h
strencodings.cpp
strencodings.h
string.cpp
string.h
system.cpp
system.h
threadnames.cpp
threadnames.h
time.cpp
time.h
translation.h
ui_change_type.h
url.cpp
url.h
vector.h
► wallet
► test
coinselector_tests.cpp
db_tests.cpp
init_test_fixture.cpp
init_test_fixture.h
init_tests.cpp
ismine_tests.cpp
psbt_wallet_tests.cpp
scriptpubkeyman_tests.cpp
wallet_crypto_tests.cpp
wallet_test_fixture.cpp
wallet_test_fixture.h
wallet_tests.cpp
bdb.cpp
bdb.h
coincontrol.cpp
coincontrol.h
coinselection.cpp
coinselection.h
context.cpp
context.h
crypter.cpp
crypter.h
db.cpp
db.h
feebumper.cpp
feebumper.h
fees.cpp
fees.h
init.cpp
ismine.h
load.cpp
load.h
rpcdump.cpp
rpcwallet.cpp
rpcwallet.h
salvage.cpp
salvage.h
scriptpubkeyman.cpp
scriptpubkeyman.h
wallet.cpp
wallet.h
walletdb.cpp
walletdb.h
wallettool.cpp
wallettool.h
walletutil.cpp
walletutil.h
► zmq
zmqabstractnotifier.cpp
zmqabstractnotifier.h
zmqconfig.h
zmqnotificationinterface.cpp
zmqnotificationinterface.h
zmqpublishnotifier.cpp
zmqpublishnotifier.h
zmqrpc.cpp
zmqrpc.h
addrdb.cpp
addrdb.h
addrman.cpp
addrman.h
amount.h
arith_uint256.cpp
arith_uint256.h
attributes.h
banman.cpp
banman.h
base58.cpp
base58.h
bech32.cpp
bech32.h
bitcoin-cli.cpp
bitcoin-tx.cpp
bitcoin-wallet.cpp
bitcoind.cpp
blockencodings.cpp
blockencodings.h
blockfilter.cpp
blockfilter.h
bloom.cpp
bloom.h
chain.cpp
chain.h
chainparams.cpp
chainparams.h
chainparamsbase.cpp
chainparamsbase.h
chainparamsseeds.h
checkqueue.h
clientversion.cpp
clientversion.h
coins.cpp
coins.h
compat.h
compressor.cpp
compressor.h
core_io.h
core_memusage.h
core_read.cpp
core_write.cpp
cuckoocache.h
dbwrapper.cpp
dbwrapper.h
dummywallet.cpp
flatfile.cpp
flatfile.h
fs.cpp
fs.h
hash.cpp
hash.h
httprpc.cpp
httprpc.h
httpserver.cpp
httpserver.h
indirectmap.h
init.cpp
init.h
key.cpp
key.h
key_io.cpp
key_io.h
limitedmap.h
logging.cpp
logging.h
memusage.h
merkleblock.cpp
merkleblock.h
miner.cpp
miner.h
net.cpp
net.h
net_permissions.cpp
net_permissions.h
net_processing.cpp
net_processing.h
net_types.h
netaddress.cpp
netaddress.h
netbase.cpp
netbase.h
netmessagemaker.h
noui.cpp
noui.h
optional.h
outputtype.cpp
outputtype.h
pow.cpp
pow.h
prevector.h
protocol.cpp
protocol.h
psbt.cpp
psbt.h
pubkey.cpp
pubkey.h
random.cpp
random.h
randomenv.cpp
randomenv.h
rest.cpp
reverse_iterator.h
scheduler.cpp
scheduler.h
serialize.h
shutdown.cpp
shutdown.h
span.h
streams.h
sync.cpp
sync.h
threadinterrupt.cpp
threadinterrupt.h
threadsafety.h
timedata.cpp
timedata.h
tinyformat.h
torcontrol.cpp
torcontrol.h
txdb.cpp
txdb.h
txmempool.cpp
txmempool.h
uint256.cpp
uint256.h
undo.h
validation.cpp
validation.h
validationinterface.cpp
validationinterface.h
version.h
versionbits.cpp
versionbits.h
versionbitsinfo.cpp
versionbitsinfo.h
walletinitinterface.h
warnings.cpp
warnings.h