It makes sense in general (further narrowing down the time window when
transactions are processed by consensus thread) and it improves block times a
little too, especially in the 7+2 scenario.
Related to #2744.
1. UsageText shows the command usage rule. Fixed/added where needed.
2. Description shows the command description, huh. It is shown right after
UsageText, so there's no need to repeat the command usage rule. If
Description contains Example, then it should be printed on a new line.
Usage message is shown on common --help command, thus it should be meaningful
and short. If user needs more detailed command description, then he can use
command-specific help.
As a result, current VM help looks pretty simple:
```
NEO-GO-VM > help
NAME:
VM CLI - Official VM CLI for Neo-Go
USAGE:
[global options] command [command options] [arguments...]
VERSION:
0.99.5-pre-15-g5463ec41
COMMANDS:
exit Exit the VM prompt
ip Show current instruction
break Place a breakpoint
jump Jump to the specified instruction (absolute IP value)
estack Show evaluation stack contents
istack Show invocation stack contents
sslot Show static slot contents
lslot Show local slot contents
aslot Show arguments slot contents
loadnef Load a NEF-consistent script into the VM optionally attaching to it provided signers with scopes
loadbase64 Load a base64-encoded script string into the VM optionally attaching to it provided signers with scopes
loadhex Load a hex-encoded script string into the VM optionally attaching to it provided signers with scopes
loadgo Compile and load a Go file with the manifest into the VM optionally attaching to it provided signers with scopes
loadtx Load transaction into the VM from chain or from parameter context file
loaddeployed Load deployed contract into the VM from chain optionally attaching to it provided signers with scopes
reset Unload compiled script from the VM and reset context to proper (possibly, historic) state
parse Parse provided argument and convert it into other possible formats
run Execute the current loaded script
cont Continue execution of the current loaded script
step Step (n) instruction in the program
stepinto Stepinto instruction to take in the debugger
stepout Stepout instruction to take in the debugger
stepover Stepover instruction to take in the debugger
ops Dump opcodes of the current loaded program
events Dump events emitted by the current loaded program
env Dump state of the chain that is used for VM CLI invocations (use -v for verbose node configuration)
storage Dump storage of the contract with the specified hash, address or ID as is at the current stage of script invocation
changes Dump storage changes as is at the current stage of loaded script invocation
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--help, -h show help
--version, -v print the version
```
Share parameters parsing code between 'contract invokefunction' and
'vm run' commands. It allows VM CLI to parse more complicated parameter
types including arrays and file-backed bytestrings.
The tests are still there, coverage should counted fine, but it improves things:
? github.com/nspcc-dev/neo-go/cli [no test files]
ok github.com/nspcc-dev/neo-go/cli/app 0.058s coverage: 100.0% of statements
ok github.com/nspcc-dev/neo-go/cli/cmdargs 0.005s coverage: 60.8% of statements
ok github.com/nspcc-dev/neo-go/cli/flags 0.027s coverage: 97.7% of statements
? github.com/nspcc-dev/neo-go/cli/input [no test files]
ok github.com/nspcc-dev/neo-go/cli/nep_test 30.443s coverage: [no statements]
ok github.com/nspcc-dev/neo-go/cli/options 0.054s coverage: 50.0% of statements
? github.com/nspcc-dev/neo-go/cli/paramcontext [no test files]
ok github.com/nspcc-dev/neo-go/cli/query 2.089s coverage: 45.3% of statements
ok github.com/nspcc-dev/neo-go/cli/server 1.510s coverage: 67.8% of statements
ok github.com/nspcc-dev/neo-go/cli/smartcontract 8.433s coverage: 94.3% of statements
ok github.com/nspcc-dev/neo-go/cli/util 0.013s coverage: 10.9% of statements
? github.com/nspcc-dev/neo-go/cli/vm [no test files]
ok github.com/nspcc-dev/neo-go/cli/wallet 47.252s coverage: 63.0% of statements
Refs. #2379, but not completely solves it, one package seriously outweights
others:
? github.com/nspcc-dev/neo-go/cli [no test files]
ok github.com/nspcc-dev/neo-go/cli/app 0.036s coverage: 100.0% of statements
ok github.com/nspcc-dev/neo-go/cli/cmdargs 0.011s coverage: 60.8% of statements
ok github.com/nspcc-dev/neo-go/cli/flags 0.009s coverage: 97.7% of statements
? github.com/nspcc-dev/neo-go/cli/input [no test files]
ok github.com/nspcc-dev/neo-go/cli/options 0.033s coverage: 50.0% of statements
? github.com/nspcc-dev/neo-go/cli/paramcontext [no test files]
ok github.com/nspcc-dev/neo-go/cli/query 2.155s coverage: 45.3% of statements
ok github.com/nspcc-dev/neo-go/cli/server 1.373s coverage: 67.8% of statements
ok github.com/nspcc-dev/neo-go/cli/smartcontract 8.819s coverage: 94.3% of statements
ok github.com/nspcc-dev/neo-go/cli/util 0.006s coverage: 10.9% of statements
? github.com/nspcc-dev/neo-go/cli/vm [no test files]
ok github.com/nspcc-dev/neo-go/cli/wallet 72.103s coverage: 88.2% of statements
Still a nice thing to have.
Make NEP-11 code use getnep11balances the same way NEP-17 code uses
getnep17balances. This command was introduced well before getnep11balances
appeared, so it required always specifying contract explicitly. Now this
constraint can be relaxed somewhat in most cases.
1. In the single token mode compare known hashes instead of names, names can
be misleading.
2. Hardcode NEO/GAS, they are special (if not overrided by the wallet data).
We have this data available since 0.99.1 while all public networks require at
least 0.99.2 for compatibility and NeoFS setups use 0.99.2+ too. This data can
simplify account handling considerably making additional requests unneccessary
in many cases.
In the same way we do for NEP-17 tokens. This code predates "getnep11balances"
call, so this wasn't possible back then, but now we can improve the situation
(allow specifying names/symbols instead of hashes only).
Unfortunately Go doesn't allow to easily reuse readers in full packages, still
we can have this wrapper with a little overhead (the alternative is to move
specific methods into types of their own, but I'm not sure how it's going to
be accepted user-side).
Notice that int64 types are used for gas per block or registration price
because the price has to fit into the system fee limitation and gas per block
value can't be more than 10 GAS. We use int64 for votes as well in other types
since NEO is limited to 100M.
See neo-project/neo#2390. Can't see it there? No wonder, that's why we have
this bug for a year and a half. Not critical, we don't care about versions,
but _very_ annoying.
Saving into a file can't be successful without signAndPush flag (wallet
present). This situation can't happen in CLI invocations since
testinvokefunction doesn't have `--out` flag, but still it's a logic
error. Everything else can be simplified a bit taking that into account.
Some commands don't accept arguments, but users try giving them and don't
notice a mistake. It's a bit more user-friendly to tell the user that there is
something wrong with the way he tries to use the command.
It has a stub for SIGHUP, but doesn't have anything for USR1 and USR2:
Error: cli\server\server.go:520:31: undefined: syscall.SIGUSR1
Error: cli\server\server.go:521:31: undefined: syscall.SIGUSR2
Error: cli\server\server.go:565:17: undefined: syscall.SIGUSR1
Error: cli\server\server.go:608:17: undefined: syscall.SIGUSR2
Which allows to enable/disable the service, change nodes, keys and other
settings. Unfortunately, atomic.Value doesn't allow Store(nil), so we have to
store a pointer there that can point to nil interface.
