Add support for monitoring system account balances (#9345)

automerge
This commit is contained in:
Michael Vines 2020-04-06 21:41:53 -07:00 committed by GitHub
parent 33a68ec9c3
commit 03978ac5a5
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 289 additions and 173 deletions

View File

@ -2,7 +2,10 @@ use log::*;
use serde::{Deserialize, Serialize};
use solana_client::{client_error::Result as ClientResult, rpc_client::RpcClient};
use solana_metrics::{datapoint_error, datapoint_info};
use solana_sdk::{clock::Slot, program_utils::limited_deserialize, transaction::Transaction};
use solana_sdk::{
clock::Slot, program_utils::limited_deserialize, pubkey::Pubkey, signature::Signature,
transaction::Transaction,
};
use solana_stake_program::{stake_instruction::StakeInstruction, stake_state::Lockup};
use solana_transaction_status::{ConfirmedBlock, RpcTransactionStatusMeta, TransactionEncoding};
use std::{collections::HashMap, thread::sleep, time::Duration};
@ -11,41 +14,64 @@ pub type PubkeyString = String;
pub type SignatureString = String;
#[derive(Serialize, Deserialize, Debug, PartialEq)]
pub enum StakeAccountOperation {
pub enum AccountOperation {
Initialize,
Withdraw,
SplitSource,
SplitDestination,
SystemAccountEnroll,
FailedToMaintainMinimumBalance,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct StakeAccountTransactionInfo {
pub op: StakeAccountOperation,
pub struct AccountTransactionInfo {
pub op: AccountOperation,
pub slot: Slot, // Slot the transaction completed in
pub signature: SignatureString, // Transaction signature
}
#[derive(Serialize, Deserialize, Debug)]
pub struct StakeAccountInfo {
pub struct AccountInfo {
pub compliant_since: Option<Slot>, // The slot when the account was first in compliance
pub lamports: u64, // Account balance
pub transactions: Vec<StakeAccountTransactionInfo>, // Transactions affecting the account
pub transactions: Vec<AccountTransactionInfo>, // Transactions affecting the account
}
#[derive(Serialize, Deserialize, Default, Debug)]
pub struct StakeAccountsInfo {
pub struct AccountsInfo {
pub slot: Slot, // Latest processed slot
pub account_info: HashMap<PubkeyString, StakeAccountInfo>,
pub account_info: HashMap<PubkeyString, AccountInfo>,
}
impl AccountsInfo {
// System accounts must be explicitly enrolled
pub fn enroll_system_account(&mut self, account_address: &Pubkey, slot: Slot, lamports: u64) {
self.account_info.insert(
account_address.to_string(),
AccountInfo {
compliant_since: Some(slot),
lamports,
transactions: vec![AccountTransactionInfo {
op: AccountOperation::SystemAccountEnroll,
slot,
signature: Signature::default().to_string(),
}],
},
);
}
}
fn process_transaction(
slot: Slot,
transaction: &Transaction,
meta: &RpcTransactionStatusMeta,
stake_accounts: &mut HashMap<PubkeyString, StakeAccountInfo>,
accounts: &mut HashMap<PubkeyString, AccountInfo>,
) {
let mut last_instruction = true;
let message = &transaction.message;
let signature = transaction.signatures[0].to_string();
// Look for stake operations
for instruction in message.instructions.iter().rev() {
let program_pubkey = message.account_keys[instruction.program_id_index as usize];
if program_pubkey != solana_stake_program::id() {
@ -78,8 +104,6 @@ fn process_transaction(
)
),
Ok(stake_instruction) => {
let signature = transaction.signatures[0].to_string();
match stake_instruction {
StakeInstruction::Initialize(_authorized, lockup) => {
// The initialized stake account is at instruction account 0
@ -90,19 +114,19 @@ fn process_transaction(
// The amount staked is the stake account's post balance
let lamports = meta.post_balances[stake_account_index];
stake_accounts.insert(
accounts.insert(
stake_pubkey,
StakeAccountInfo {
AccountInfo {
compliant_since: if lockup != Lockup::default() {
None // Initialize with a lockup or custodian is non-compliant
} else {
Some(slot)
},
lamports,
transactions: vec![StakeAccountTransactionInfo {
op: StakeAccountOperation::Initialize,
transactions: vec![AccountTransactionInfo {
op: AccountOperation::Initialize,
slot,
signature,
signature: signature.clone(),
}],
},
);
@ -122,29 +146,29 @@ fn process_transaction(
let split_stake_pubkey =
message.account_keys[split_stake_account_index].to_string();
if let Some(mut source_stake_account_info) =
stake_accounts.get_mut(&source_stake_pubkey)
if let Some(mut source_account_info) =
accounts.get_mut(&source_stake_pubkey)
{
if source_stake_account_info.compliant_since.is_some() {
source_stake_account_info.transactions.push(
StakeAccountTransactionInfo {
op: StakeAccountOperation::SplitSource,
if source_account_info.compliant_since.is_some() {
source_account_info
.transactions
.push(AccountTransactionInfo {
op: AccountOperation::SplitSource,
slot,
signature: signature.clone(),
},
);
source_stake_account_info.lamports -= lamports;
});
source_account_info.lamports -= lamports;
let split_stake_account_info = StakeAccountInfo {
compliant_since: source_stake_account_info.compliant_since,
let split_account_info = AccountInfo {
compliant_since: source_account_info.compliant_since,
lamports,
transactions: vec![StakeAccountTransactionInfo {
op: StakeAccountOperation::SplitDestination,
transactions: vec![AccountTransactionInfo {
op: AccountOperation::SplitDestination,
slot,
signature,
signature: signature.clone(),
}],
};
stake_accounts.insert(split_stake_pubkey, split_stake_account_info);
accounts.insert(split_stake_pubkey, split_account_info);
}
}
}
@ -154,17 +178,14 @@ fn process_transaction(
let stake_account_index = instruction.accounts[0] as usize;
let stake_pubkey = message.account_keys[stake_account_index].to_string();
if let Some(mut stake_account_info) = stake_accounts.get_mut(&stake_pubkey)
{
if stake_account_info.compliant_since.is_some() {
stake_account_info.compliant_since = None;
stake_account_info
.transactions
.push(StakeAccountTransactionInfo {
op: StakeAccountOperation::Withdraw,
slot,
signature,
});
if let Some(mut account_info) = accounts.get_mut(&stake_pubkey) {
if account_info.compliant_since.is_some() {
account_info.compliant_since = None;
account_info.transactions.push(AccountTransactionInfo {
op: AccountOperation::Withdraw,
slot,
signature: signature.clone(),
});
}
}
}
@ -177,12 +198,27 @@ fn process_transaction(
}
}
}
// Ensure the balances of all monitored accounts remain in compliance
for (index, account_pubkey) in message.account_keys.iter().enumerate() {
if let Some(mut account_info) = accounts.get_mut(&account_pubkey.to_string()) {
let post_balance = meta.post_balances[index];
if account_info.compliant_since.is_some() && post_balance < account_info.lamports {
account_info.compliant_since = None;
account_info.transactions.push(AccountTransactionInfo {
op: AccountOperation::FailedToMaintainMinimumBalance,
slot,
signature: signature.clone(),
});
}
}
}
}
fn process_confirmed_block(
slot: Slot,
confirmed_block: ConfirmedBlock,
stake_accounts: &mut HashMap<PubkeyString, StakeAccountInfo>,
accounts: &mut HashMap<PubkeyString, AccountInfo>,
) {
for rpc_transaction in confirmed_block.transactions {
match rpc_transaction.meta {
@ -197,7 +233,7 @@ fn process_confirmed_block(
if meta.err.is_none() {
if let Some(transaction) = rpc_transaction.transaction.decode() {
if transaction.verify().is_ok() {
process_transaction(slot, &transaction, &meta, stake_accounts);
process_transaction(slot, &transaction, &meta, accounts);
} else {
datapoint_error!(
"stake-monitor-failure",
@ -233,14 +269,10 @@ fn load_blocks(
Ok(blocks)
}
pub fn process_slots(
rpc_client: &RpcClient,
stake_accounts_info: &mut StakeAccountsInfo,
batch_size: u64,
) {
let end_slot = stake_accounts_info.slot + batch_size;
pub fn process_slots(rpc_client: &RpcClient, accounts_info: &mut AccountsInfo, batch_size: u64) {
let end_slot = accounts_info.slot + batch_size;
loop {
let start_slot = stake_accounts_info.slot + 1;
let start_slot = accounts_info.slot + 1;
info!("start_slot:{} - end_slot:{}", start_slot, end_slot);
if start_slot >= end_slot {
break;
@ -253,11 +285,8 @@ pub fn process_slots(
0
});
if stake_accounts_info.slot >= latest_available_slot {
info!(
"Waiting for a slot greater than {}...",
stake_accounts_info.slot
);
if accounts_info.slot >= latest_available_slot {
info!("Waiting for a slot greater than {}...", accounts_info.slot);
sleep(Duration::from_secs(5));
continue;
}
@ -267,17 +296,14 @@ pub fn process_slots(
info!("Loaded {} blocks", blocks.len());
if blocks.is_empty() && end_slot < latest_available_slot {
stake_accounts_info.slot = end_slot;
accounts_info.slot = end_slot;
} else {
for (slot, block) in blocks.into_iter() {
process_confirmed_block(slot, block, &mut stake_accounts_info.account_info);
stake_accounts_info.slot = slot;
process_confirmed_block(slot, block, &mut accounts_info.account_info);
accounts_info.slot = slot;
}
}
datapoint_info!(
"stake-monitor-slot",
("slot", stake_accounts_info.slot, i64)
);
datapoint_info!("stake-monitor-slot", ("slot", accounts_info.slot, i64));
}
Err(err) => {
datapoint_error!(
@ -317,6 +343,8 @@ mod test {
#[serial]
fn test_record() {
solana_logger::setup();
let mut accounts_info = AccountsInfo::default();
let one_sol = sol_to_lamports(1.0);
let cluster = LocalCluster::new(&ClusterConfig {
operating_mode: OperatingMode::Stable,
@ -482,117 +510,163 @@ mod test {
)
.unwrap();
// System transfer 1
let system1_keypair = Keypair::new();
// Fund system1
let fund_system1_signature = rpc_client
.send_transaction(&system_transaction::transfer(
&payer,
&system1_keypair.pubkey(),
2 * one_sol,
blockhash,
))
.unwrap();
rpc_client
.poll_for_signature_with_commitment(&fund_system1_signature, CommitmentConfig::recent())
.unwrap();
accounts_info.enroll_system_account(
&system1_keypair.pubkey(),
rpc_client
.get_slot_with_commitment(CommitmentConfig::recent())
.unwrap(),
2 * one_sol,
);
// Withdraw 1 sol from system 1 to make it non-compliant
rpc_client
.send_transaction(&system_transaction::transfer(
&system1_keypair,
&payer.pubkey(),
one_sol,
blockhash,
))
.unwrap();
// Process all the transactions
let mut stake_accounts_info = StakeAccountsInfo::default();
let current_slot = rpc_client
.get_slot_with_commitment(CommitmentConfig::recent())
.unwrap();
process_slots(&rpc_client, &mut stake_accounts_info, current_slot + 1);
process_slots(&rpc_client, &mut accounts_info, current_slot + 1);
//
// Check that `stake_accounts_info` was populated with the expected results
// Check that `accounts_info` was populated with the expected results
//
info!("Check the data recorded for stake1");
let stake_account_info = stake_accounts_info
let account_info = accounts_info
.account_info
.get(&stake1_keypair.pubkey().to_string())
.unwrap();
assert!(stake_account_info.compliant_since.is_some());
assert_eq!(stake_account_info.lamports, one_sol);
assert_eq!(stake_account_info.transactions.len(), 1);
assert!(account_info.compliant_since.is_some());
assert_eq!(account_info.lamports, one_sol);
assert_eq!(account_info.transactions.len(), 1);
assert_eq!(
stake_account_info.transactions[0].op,
StakeAccountOperation::Initialize
account_info.transactions[0].op,
AccountOperation::Initialize
);
assert_eq!(
stake_account_info.transactions[0].signature,
account_info.transactions[0].signature,
stake1_signature.to_string()
);
info!("Check the data recorded for stake2");
let stake_account_info = stake_accounts_info
let account_info = accounts_info
.account_info
.get(&stake2_keypair.pubkey().to_string())
.unwrap();
assert!(stake_account_info.compliant_since.is_none());
assert_eq!(stake_account_info.lamports, one_sol);
assert_eq!(stake_account_info.transactions.len(), 1);
assert!(account_info.compliant_since.is_none());
assert_eq!(account_info.lamports, one_sol);
assert_eq!(account_info.transactions.len(), 1);
assert_eq!(
stake_account_info.transactions[0].op,
StakeAccountOperation::Initialize
account_info.transactions[0].op,
AccountOperation::Initialize
);
assert_eq!(
stake_account_info.transactions[0].signature,
account_info.transactions[0].signature,
stake2_signature.to_string()
);
info!("Check the data recorded for stake3");
let stake_account_info = stake_accounts_info
let account_info = accounts_info
.account_info
.get(&stake3_keypair.pubkey().to_string())
.unwrap();
assert!(stake_account_info.compliant_since.is_none());
assert_eq!(stake_account_info.lamports, one_sol);
assert_eq!(stake_account_info.transactions.len(), 2);
assert!(account_info.compliant_since.is_none());
assert_eq!(account_info.lamports, one_sol);
assert_eq!(account_info.transactions.len(), 2);
assert_eq!(
stake_account_info.transactions[0].op,
StakeAccountOperation::Initialize
account_info.transactions[0].op,
AccountOperation::Initialize
);
assert_eq!(
stake_account_info.transactions[0].signature,
account_info.transactions[0].signature,
stake3_initialize_signature.to_string()
);
assert_eq!(account_info.transactions[1].op, AccountOperation::Withdraw,);
assert_eq!(
stake_account_info.transactions[1].op,
StakeAccountOperation::Withdraw,
);
assert_eq!(
stake_account_info.transactions[1].signature,
account_info.transactions[1].signature,
stake3_withdraw_signature.to_string()
);
info!("Check the data recorded for stake4");
let stake_account_info = stake_accounts_info
let account_info = accounts_info
.account_info
.get(&stake4_keypair.pubkey().to_string())
.unwrap();
assert!(stake_account_info.compliant_since.is_some());
assert_eq!(stake_account_info.lamports, one_sol);
assert_eq!(stake_account_info.transactions.len(), 2);
assert!(account_info.compliant_since.is_some());
assert_eq!(account_info.lamports, one_sol);
assert_eq!(account_info.transactions.len(), 2);
assert_eq!(
stake_account_info.transactions[0].op,
StakeAccountOperation::Initialize
account_info.transactions[0].op,
AccountOperation::Initialize
);
assert_eq!(
stake_account_info.transactions[0].signature,
account_info.transactions[0].signature,
stake4_initialize_signature.to_string()
);
assert_eq!(
stake_account_info.transactions[1].op,
StakeAccountOperation::SplitSource,
account_info.transactions[1].op,
AccountOperation::SplitSource,
);
assert_eq!(
stake_account_info.transactions[1].signature,
account_info.transactions[1].signature,
stake45_split_signature.to_string()
);
info!("Check the data recorded for stake5");
let stake_account_info = stake_accounts_info
let account_info = accounts_info
.account_info
.get(&stake5_keypair.pubkey().to_string())
.unwrap();
error!("stake_account_info 5: {:?}", stake_account_info);
assert!(stake_account_info.compliant_since.is_some());
assert_eq!(stake_account_info.lamports, one_sol);
assert_eq!(stake_account_info.transactions.len(), 1);
assert!(account_info.compliant_since.is_some());
assert_eq!(account_info.lamports, one_sol);
assert_eq!(account_info.transactions.len(), 1);
assert_eq!(
stake_account_info.transactions[0].op,
StakeAccountOperation::SplitDestination,
account_info.transactions[0].op,
AccountOperation::SplitDestination,
);
assert_eq!(
stake_account_info.transactions[0].signature,
account_info.transactions[0].signature,
stake45_split_signature.to_string()
);
info!("Check the data recorded for system1");
let account_info = accounts_info
.account_info
.get(&system1_keypair.pubkey().to_string())
.unwrap();
error!("account_info system 1: {:?}", account_info);
assert!(account_info.compliant_since.is_none());
assert_eq!(account_info.lamports, 2 * one_sol);
assert_eq!(account_info.transactions.len(), 2);
assert_eq!(
account_info.transactions[0].op,
AccountOperation::SystemAccountEnroll,
);
assert_eq!(
account_info.transactions[1].op,
AccountOperation::FailedToMaintainMinimumBalance,
);
}
}

View File

@ -9,48 +9,46 @@ use solana_clap_utils::{
};
use solana_client::rpc_client::RpcClient;
use solana_metrics::datapoint_error;
use solana_sdk::{clock::Slot, native_token::lamports_to_sol, pubkey::Pubkey};
use solana_sdk::{clock::Slot, native_token::lamports_to_sol, pubkey::Pubkey, system_program};
use solana_stake_monitor::*;
use std::{fs, io, process};
fn load_stake_accounts_info(data_file: &str) -> StakeAccountsInfo {
fn load_accounts_info(data_file: &str) -> AccountsInfo {
let data_file_new = data_file.to_owned() + "new";
let stake_accounts_info = solana_cli_config::load_config_file(&data_file_new)
let accounts_info = solana_cli_config::load_config_file(&data_file_new)
.or_else(|_| solana_cli_config::load_config_file(data_file))
.unwrap_or_default();
// Ensure `data_file` always exists
save_stake_accounts_info(data_file, &stake_accounts_info).expect("save_stake_accounts_info");
save_accounts_info(data_file, &accounts_info).expect("save_accounts_info");
stake_accounts_info
accounts_info
}
fn save_stake_accounts_info(
data_file: &str,
stake_accounts_info: &StakeAccountsInfo,
) -> io::Result<()> {
fn save_accounts_info(data_file: &str, accounts_info: &AccountsInfo) -> io::Result<()> {
let data_file_new = data_file.to_owned() + "new";
solana_cli_config::save_config_file(&stake_accounts_info, &data_file_new)?;
solana_cli_config::save_config_file(&accounts_info, &data_file_new)?;
let _ = fs::remove_file(data_file);
fs::rename(&data_file_new, data_file)
}
fn command_record(data_file: String, json_rpc_url: String, first_slot: Slot, batch_size: u64) {
let mut stake_accounts_info = load_stake_accounts_info(&data_file);
fn command_record(data_file: &str, json_rpc_url: String, first_slot: Slot, batch_size: u64) {
let mut accounts_info = load_accounts_info(&data_file);
info!("RPC URL: {}", json_rpc_url);
let rpc_client = RpcClient::new(json_rpc_url);
if stake_accounts_info.slot < first_slot {
stake_accounts_info.slot = first_slot;
if accounts_info.slot < first_slot {
accounts_info.slot = first_slot;
}
loop {
process_slots(&rpc_client, &mut stake_accounts_info, batch_size);
save_stake_accounts_info(&data_file, &stake_accounts_info).unwrap_or_else(|err| {
process_slots(&rpc_client, &mut accounts_info, batch_size);
save_accounts_info(data_file, &accounts_info).unwrap_or_else(|err| {
datapoint_error!(
"stake-monitor-failure",
(
"err",
format!("failed to save stake_accounts_info: {}", err),
format!("failed to save accounts_info: {}", err),
String
)
);
@ -58,26 +56,54 @@ fn command_record(data_file: String, json_rpc_url: String, first_slot: Slot, bat
}
}
fn command_check(data_file: String, stake_account_pubkey: Pubkey) {
let stake_accounts_info = load_stake_accounts_info(&data_file);
fn command_enroll(data_file: &str, json_rpc_url: String, account_address: &Pubkey) {
info!("RPC URL: {}", json_rpc_url);
let rpc_client = RpcClient::new(json_rpc_url);
let slot = rpc_client.get_slot().expect("get slot");
if let Some(stake_account_info) = stake_accounts_info
.account_info
.get(&stake_account_pubkey.to_string())
{
if let Some(slot) = stake_account_info.compliant_since {
let account = rpc_client
.get_account(account_address)
.unwrap_or_else(|err| {
eprintln!(
"Unable to get account info for {}: {}",
account_address, err
);
process::exit(1);
});
if account.owner != system_program::id() && !account.data.is_empty() {
eprintln!("{} is not a system account", account_address);
process::exit(1);
}
let mut accounts_info = load_accounts_info(data_file);
accounts_info.enroll_system_account(account_address, slot, account.lamports);
save_accounts_info(data_file, &accounts_info).unwrap();
println!(
"Enrolled {} at slot {} with a balance of {} SOL",
account_address,
slot,
lamports_to_sol(account.lamports)
);
}
fn command_check(data_file: &str, account_address: &Pubkey) {
let accounts_info = load_accounts_info(data_file);
if let Some(account_info) = accounts_info.account_info.get(&account_address.to_string()) {
if let Some(slot) = account_info.compliant_since {
println!(
"{}Stake account compliant since slot {} with a balance of {} SOL",
"{}Account compliant since slot {} with a balance of {} SOL",
Emoji("", ""),
slot,
lamports_to_sol(stake_account_info.lamports)
lamports_to_sol(account_info.lamports)
);
process::exit(0);
} else {
eprintln!(
"{}Stake account not compliant due to: {:?}",
"{}Account not compliant due to: {:?}",
Emoji("", ""),
stake_account_info.transactions.last().unwrap()
account_info.transactions.last().unwrap()
);
process::exit(1);
}
@ -107,30 +133,30 @@ fn main() {
This file is updated atomically after each batch of slots is processed.",
),
)
.arg(
Arg::with_name("json_rpc_url")
.long("url")
.value_name("URL")
.takes_value(true)
.validator(is_url)
.help("JSON RPC URL for the cluster"),
)
.arg({
let arg = Arg::with_name("config_file")
.short("C")
.long("config")
.value_name("PATH")
.takes_value(true)
.help("Configuration file to use");
if let Some(ref config_file) = *solana_cli_config::CONFIG_FILE {
arg.default_value(&config_file)
} else {
arg
}
})
.subcommand(
SubCommand::with_name("record")
.about("Monitor all Cluster transactions for state account compliance")
.arg({
let arg = Arg::with_name("config_file")
.short("C")
.long("config")
.value_name("PATH")
.takes_value(true)
.help("Configuration file to use");
if let Some(ref config_file) = *solana_cli_config::CONFIG_FILE {
arg.default_value(&config_file)
} else {
arg
}
})
.arg(
Arg::with_name("json_rpc_url")
.long("url")
.value_name("URL")
.takes_value(true)
.validator(is_url)
.help("JSON RPC URL for the cluster"),
)
.arg(
Arg::with_name("first_slot")
.long("--first-slot")
@ -151,37 +177,53 @@ fn main() {
)
.subcommand(
SubCommand::with_name("check")
.about("Check if a state account is in compliance")
.about("Check if an account is in compliance")
.arg(
Arg::with_name("stake_account_pubkey")
Arg::with_name("account_address")
.index(1)
.value_name("ADDRESS")
.validator(is_pubkey)
.required(true)
.help("Stake account address"),
.help("Account address"),
),
)
.subcommand(
SubCommand::with_name("enroll")
.about("Enroll a system account for balance monitoring")
.arg(
Arg::with_name("account_address")
.index(1)
.value_name("ADDRESS")
.validator(is_pubkey)
.required(true)
.help("Account address"),
),
)
.get_matches();
let data_file = value_t_or_exit!(matches, "data_file", String);
let json_rpc_url = value_t!(matches, "json_rpc_url", String).unwrap_or_else(|_| {
let config = if let Some(config_file) = matches.value_of("config_file") {
solana_cli_config::Config::load(config_file).unwrap_or_default()
} else {
solana_cli_config::Config::default()
};
config.json_rpc_url
});
match matches.subcommand() {
("record", Some(matches)) => {
let batch_size = value_t_or_exit!(matches, "batch_size", u64);
let first_slot = value_t_or_exit!(matches, "first_slot", Slot);
let json_rpc_url = value_t!(matches, "json_rpc_url", String).unwrap_or_else(|_| {
let config = if let Some(config_file) = matches.value_of("config_file") {
solana_cli_config::Config::load(config_file).unwrap_or_default()
} else {
solana_cli_config::Config::default()
};
config.json_rpc_url
});
command_record(data_file, json_rpc_url, first_slot, batch_size);
command_record(&data_file, json_rpc_url, first_slot, batch_size);
}
("check", Some(matches)) => {
let stake_account_pubkey = pubkey_of(&matches, "stake_account_pubkey").unwrap();
command_check(data_file, stake_account_pubkey);
let account_address = pubkey_of(&matches, "account_address").unwrap();
command_check(&data_file, &account_address);
}
("enroll", Some(matches)) => {
let account_address = pubkey_of(&matches, "account_address").unwrap();
command_enroll(&data_file, json_rpc_url, &account_address);
}
_ => unreachable!(),
}