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support pagination for topholders and topram #19

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support pagination for topholders and topram #19

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4a95fe8
support pagination for topholders and topram
apporc Jun 2, 2024
a2eea05
update docs about pagination
apporc Jun 2, 2024
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9 changes: 5 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -38,10 +38,10 @@ taking the data (such as `eos`, `telos`, `wax` etc.).
balance. Zero is returned if the token is not present or does not
exist.

* `http://apihost.domain/api/topholders/CHAIN/CONTRACT/TOKEN/NUM` returns
* `http://apihost.domain/api/topholders/CHAIN/CONTRACT/TOKEN/NUM[/MARKER]` returns
top NUM holders of a specified token in a JSON array containing arrays
of (account, amount) pairs. NUM must not be less than 10 or more than
1000.
1000. MARKER is token integer as pagination offset.

* `http://apihost.domain/api/holdercount/CHAIN/CONTRACT/TOKEN` returns the
total count of token holders as plain text. The result is "0" if the
Expand All @@ -50,9 +50,10 @@ taking the data (such as `eos`, `telos`, `wax` etc.).
* `http://apihost.domain/api/usercount/CHAIN`
returns a plain text with total number of accounts in the network.

* `http://apihost.domain/api/topram/CHAIN/NUM` returns top NUM RAM buyers
* `http://apihost.domain/api/topram/CHAIN/NUM[/MARKER]` returns top NUM RAM buyers
in a JSON array containing arrays of (account, bytes) pairs. NUM must
not be less than 10 or more than 1000.
not be less than 10 or more than 1000. MARKER is bytes number as pagination
offset.

* `http://apihost.domain/api/topstake/CHAIN/NUM` returns top NUM stake
holders by sum of CPU and Net stakes, in a JSON array containing
Expand Down
51 changes: 37 additions & 14 deletions api/lightapi.psgi
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Original file line number Diff line number Diff line change
Expand Up @@ -929,27 +929,39 @@ $builder->mount
my $req = Plack::Request->new($env);
my $path_info = $req->path_info;

if ( $path_info !~ /^\/(\w+)\/([a-z1-5.]{1,13})\/([A-Z]{1,7})\/(\d+)$/ ) {
return(error($req, 'Expected network name, contract, token name, count in URL path'));
if ( $path_info !~ /^\/(\w+)\/([a-z1-5.]{1,13})\/([A-Z]{1,7})\/(\d+)(\/(\d+))?$/ ) {
return(error($req, 'Expected network name, contract, token name, count, marker in URL path'));
}

my $network = $1;
my $contract = $2;
my $currency = $3;
my $count = $4;
my $marker = $6;

if( $count < 10 or $count > 1000 )
{
return(error($req, 'Invalid count: ' . $count));
}

check_dbserver();
my $sth_topholders = $dbh->prepare
('SELECT account_name, CAST(amount AS DECIMAL(48,24)) AS amt, decimals ' .
'FROM ' . $network . '_CURRENCY_BAL ' .
'WHERE contract=? AND currency=? ' .
'ORDER BY amount DESC LIMIT ?');
$sth_topholders->execute($contract, $currency, $count);

my $sth_topholders;
if ( $marker ) {
$sth_topholders = $dbh->prepare
('SELECT account_name, CAST(amount AS DECIMAL(48,24)) AS amt, decimals ' .
'FROM ' . $network . '_CURRENCY_BAL ' .
'WHERE contract=? AND currency=? AND amount < ? ' .
'ORDER BY amount DESC LIMIT ?');
$sth_topholders->execute($contract, $currency, $marker, $count);
} else {
$sth_topholders = $dbh->prepare
('SELECT account_name, CAST(amount AS DECIMAL(48,24)) AS amt, decimals ' .
'FROM ' . $network . '_CURRENCY_BAL ' .
'WHERE contract=? AND currency=? ' .
'ORDER BY amount DESC LIMIT ?');
$sth_topholders->execute($contract, $currency, $count);
}
my $all = $sth_topholders->fetchall_arrayref({});
my $result = [];
foreach my $r (@{$all})
Expand Down Expand Up @@ -1135,24 +1147,35 @@ $builder->mount
my $req = Plack::Request->new($env);
my $path_info = $req->path_info;

if ( $path_info !~ /^\/(\w+)\/(\d+)$/ ) {
return(error($req, 'Expected a network name and count in URL path'));
if ( $path_info !~ /^\/(\w+)\/(\d+)(\/(\d+))?$/ ) {
return(error($req, 'Expected a network name, count and marker in URL path'));
}

my $network = $1;
my $count = $2;
my $marker = $4;

if( $count < 10 or $count > 1000 )
{
return(error($req, 'Invalid count: ' . $count));
}

check_dbserver();
my $sth_topram = $dbh->prepare
('SELECT account_name, ram_bytes FROM ' . $network . '_USERRES ' .
'ORDER BY ram_bytes DESC LIMIT ?');

$sth_topram->execute($count);
my $sth_topram;
if ( $marker ) {
$sth_topram = $dbh->prepare
('SELECT account_name, ram_bytes FROM ' . $network . '_USERRES ' .
'WHERE ram_bytes < ? ' .
'ORDER BY ram_bytes DESC LIMIT ?');
$sth_topram->execute($marker, $count);
} else {
$sth_topram = $dbh->prepare
('SELECT account_name, ram_bytes FROM ' . $network . '_USERRES ' .
'ORDER BY ram_bytes DESC LIMIT ?');
$sth_topram->execute($count);
}

my $all = $sth_topram->fetchall_arrayref({});
my $result = [];
foreach my $r (@{$all})
Expand Down