Steemit-WsClient/lib/Steemit/WsClient.pm
package Steemit::WsClient;
=head1 NAME
Steemit::WsClient - perl library for interacting with the steemit websocket services!
=head1 VERSION
Version 0.11
=cut
our $VERSION = '0.11';
=head1 SYNOPSIS
use Steemit::WsClient;
my $foo = Steemit::WsClient->new();
my $steem = Steemit::WsClient->new( url => 'https://some.steemit.d.node.address');
say "Initialized Steemit::WsClient client with url ".$steem->url;
#get the last 99 discussions with the tag utopian-io
#truncate the body since we dont care here
my $discussions = $steem->get_discussions_by_created({
tag => 'utopian-io',
limit => 99,
truncate_body => 100,
});
#extract the author names out of the result
my @author_names = map { $_->{author} } @$discussions;
say "last 99 authors: ".join(", ", @author_names);
#load the author details
my $authors = $steem->get_accounts( [@author_names] );
#say Dumper $authors->[0];
#calculate the reputation average
my $reputation_sum = 0;
for my $author ( @$authors ){
$reputation_sum += int( $author->{reputation} / 1000_000_000 );
}
say "Average reputation of the last 99 utopian authors: ". ( int( $reputation_sum / scalar(@$authors) ) / 100 );
=head1 DEPENDENCIES
you will need some packages.
openssl support for https
libgmp-dev for large integer aritmetic needd for the eliptical curve calculations
libssl-dev zlib1g-dev libgmp-dev
=head1 SUBROUTINES/METHODS
=cut
use Modern::Perl;
use Mojo::Base -base;
use Mojo::UserAgent;
use Mojo::JSON qw(decode_json encode_json);
use Data::Dumper;
has url => 'https://api.steemit.com/';
has ua => sub { Mojo::UserAgent->new };
has posting_key => undef;
has plain_posting_key => \&_transform_private_key;
=head2 all database api methods of the steemit api
L<https://github.com/steemit/steem/blob/master/libraries/app/database_api.cpp>
get_miner_queue
lookup_account_names
get_discussions
get_discussions_by_blog
get_witness_schedule
get_open_orders
get_trending_tags
lookup_witness_accounts
get_discussions_by_children
get_accounts
get_savings_withdraw_to
get_potential_signatures
get_required_signatures
get_order_book
get_key_references
get_tags_used_by_author
get_account_bandwidth
get_replies_by_last_update
get_dynamic_global_properties
get_block
get_witnesses
get_transaction_hex
get_comment_discussions_by_payout
get_discussions_by_votes
get_witness_by_account
verify_authority
get_config
get_account_votes
get_discussions_by_promoted
get_conversion_requests
get_account_history
get_escrow
get_discussions_by_comments
get_feed_history
get_hardfork_version
set_block_applied_callback
get_discussions_by_author_before_date
get_discussions_by_hot
get_discussions_by_payout
get_discussions_by_trending
get_recovery_request
get_reward_fund
get_chain_properties
get_witnesses_by_vote
get_account_references
get_post_discussions_by_payout
get_active_witnesses
get_ops_in_block
get_discussions_by_created
get_discussions_by_active
get_account_count
get_owner_history
get_next_scheduled_hardfork
get_savings_withdraw_from
get_active_votes
get_current_median_history_price
get_transaction
get_block_header
get_expiring_vesting_delegations
get_witness_count
get_content
verify_account_authority
get_liquidity_queue
get_discussions_by_feed
get_discussions_by_cashout
get_content_replies
lookup_accounts
get_state
get_withdraw_routes
=head2 get_discussions_by_xxxxxx
all those methods will sort the results differently and accept one query parameter with the values:
{
tag => 'tagtosearch', # optional
limit => 1, # max 100
filter_tags => [], # tags to filter out
select_authors => [], # only those authors
truncate_body => 0 # the number of bytes of the post body to return, 0 for all
start_author => '' # used together with the start_permlink gor pagination
start_permlink => '' #
parent_author => '' #
parent_permlink => '' #
}
so one example on how to get 200 discussions would be
my $discussions = $steem->get_discussions_by_created({
limit => 100,
truncate_body => 1,
});
my $discussion = $discussions[-1];
push @$discussions, $steem->get_discussions_by_created({
limit => 100,
truncate_body => 1,
start_author => $discussion->{author},
start_permlink => $discussion->{permlink},
});
=cut
sub _request {
my( $self, $api, $method, @params ) = @_;
my $response = $self->ua->post( $self->url, json => {
jsonrpc => '2.0',
method => 'call',
params => [$api,$method,[@params]],
id => int rand 100,
})->result;
die "error while requesting steemd ". $response->to_string unless $response->is_success;
my $result = decode_json $response->body;
return $result->{result} if $result->{result};
if( my $error = $result->{error} ){
die $error->{message};
}
#ok no error no result
require Data::Dumper;
die "unexpected api result: ".Data::Dumper::Dumper( $result );
}
_install_methods();
sub _install_methods {
my %definition = _get_api_definition();
for my $api ( keys %definition ){
for my $method ( @{ $definition{$api} } ){
no strict 'subs';
no strict 'refs';
my $package_sub = join '::', __PACKAGE__, $method;
*$package_sub = sub {
shift->_request($api,$method,@_);
}
}
}
}
sub _get_api_definition {
my @database_api = qw(
get_miner_queue
lookup_account_names
get_discussions
get_discussions_by_blog
get_witness_schedule
get_open_orders
get_trending_tags
lookup_witness_accounts
get_discussions_by_children
get_accounts
get_savings_withdraw_to
get_potential_signatures
get_required_signatures
get_order_book
get_tags_used_by_author
get_account_bandwidth
get_replies_by_last_update
get_dynamic_global_properties
get_block
get_witnesses
get_transaction_hex
get_comment_discussions_by_payout
get_discussions_by_votes
get_witness_by_account
verify_authority
get_config
get_account_votes
get_discussions_by_promoted
get_conversion_requests
get_account_history
get_escrow
get_discussions_by_comments
get_feed_history
get_hardfork_version
set_block_applied_callback
get_discussions_by_author_before_date
get_discussions_by_hot
get_discussions_by_payout
get_discussions_by_trending
get_recovery_request
get_reward_fund
get_chain_properties
get_witnesses_by_vote
get_account_references
get_post_discussions_by_payout
get_active_witnesses
get_ops_in_block
get_discussions_by_created
get_discussions_by_active
get_account_count
get_owner_history
get_next_scheduled_hardfork
get_savings_withdraw_from
get_active_votes
get_current_median_history_price
get_transaction
get_block_header
get_expiring_vesting_delegations
get_witness_count
get_content
verify_account_authority
get_liquidity_queue
get_discussions_by_feed
get_discussions_by_cashout
get_content_replies
lookup_accounts
get_state
get_withdraw_routes
);
return (
database_api => [@database_api],
account_by_key_api => [ qw( get_key_references )],
)
}
=head2 vote
this requires you to initialize the module with your private posting key like this:
my $steem = Steemit::WsClient->new(
posting_key => 'copy this one from the steemit site',
);
$steem->vote($discussion,$weight)
weight is optional default is 10000 wich equals to 100%
=cut
sub vote {
my( $self, @discussions ) = @_;
my $weight;
$weight = pop @discussions, unless ref $discussions[-1];
$weight = $weight // 10000;
my $voter = $self->get_key_references([$self->public_posting_key])->[0][0];
my @operations = map { [
vote => {
voter => $voter,
author => $_->{author},
permlink => $_->{permlink},
weight => $weight,
}
]
} @discussions;
return $self->_broadcast_transaction(@operations);
}
=head2 comment
this requires you to initialize the module with your private posting key like this:
my $steem = Steemit::WsClient->new(
posting_key => 'copy this one from the steemit site',
);
$steem->comment(
"parent_author" => $parent_author,
"parent_permlink" => $parent_permlink,
"author" => $author,
"permlink" => $permlink,
"title" => $title,
"body" => $body,
"json_metadata" => $json_metadata,
)
you need at least a permlink and body
fill the parent parameters to comment on an existing post
json metadata can be already a json string or a perl hash
=cut
sub comment {
my( $self, %params ) = @_;
my $parent_author = $params{parent_author} // '';
my $parent_permlink = $params{parent_permlink} // '';
my $permlink = $params{permlink} or die "permlink missing for comment";
my $title = $params{title} // '';
my $body = $params{body} or die "body missing for comment";
my $json_metadata = $params{json_metadata} // {};
if( ref $json_metadata ){
$json_metadata = encode_json( $json_metadata);
}
my $author = $self->get_key_references([$self->public_posting_key])->[0][0];
my $operation = [
comment => {
"parent_author" => $parent_author,
"parent_permlink" => $parent_permlink,
"author" => $author,
"permlink" => $permlink,
"title" => $title,
"body" => $body,
"json_metadata" => $json_metadata,
}
];
return $self->_broadcast_transaction($operation);
}
=head2 delete_comment
$steem->delete_comment(
author => $author,
permlink => $permlink
)
you need the permlink
author will be filled with the user of your posting key if missing
=cut
sub delete_comment {
my( $self, %params ) = @_;
my $permlink = $params{permlink} or die "permlink missing for comment";
my $author = $params{author} // $self->get_key_references([$self->public_posting_key])->[0][0];
my $operation = [
delete_comment => {
"author" => $author,
"permlink" => $permlink,
}
];
return $self->_broadcast_transaction($operation);
}
sub _broadcast_transaction {
my( $self, @operations ) = @_;
my $properties = $self->get_dynamic_global_properties();
my $block_number = $properties->{last_irreversible_block_num};
my $block_details = $self->get_block( $block_number );
my $ref_block_id = $block_details->{previous},
my $time = $properties->{time};
#my $expiration = "2018-02-24T17:00:51";#TODO dynamic date
my ($year,$month,$day, $hour,$min,$sec) = split /\D/, $time;
require Date::Calc;
my $epoch = Date::Calc::Date_to_Time($year,$month,$day, $hour,$min,$sec);
($year,$month,$day, $hour,$min,$sec) = Date::Calc::Time_to_Date($epoch + 600 );
my $expiration = "$year-$month-$day".'T'."$hour:$min:$sec";
my $transaction = {
ref_block_num => ( $block_number - 1 )& 0xffff,
ref_block_prefix => unpack( "xxxxV", pack('H*',$ref_block_id)),
expiration => $expiration,
operations => [@operations],
extensions => [],
signatures => [],
};
my $serialized_transaction = $self->_serialize_transaction_message( $transaction );
my $bin_private_key = $self->plain_posting_key;
require Steemit::ECDSA;
my ( $r, $s, $i ) = Steemit::ECDSA::ecdsa_sign( $serialized_transaction, Math::BigInt->from_bytes( $bin_private_key ) );
$i += 4;
$i += 27;
my $signature = join('', map { unpack 'H*', $_ } ( pack("C", $i ), map { $_->as_bytes} ($r,$s )) );
unless( Steemit::ECDSA::is_signature_canonical_canonical( pack "H*", $signature ) ){
die "signature $signature is not canonical";
}
$transaction->{signatures} = [ $signature ];
$self->_request('network_broadcast_api','broadcast_transaction_synchronous',$transaction);
}
sub public_posting_key {
my( $self ) = @_;
unless( $self->{public_posting_key} ){
require Steemit::ECDSA;
my $bin_pubkey = Steemit::ECDSA::get_compressed_public_key( Math::BigInt->from_bytes( $self->plain_posting_key ) );
#TODO use the STM from dynamic lookup in get_config or somewhere
require Crypt::RIPEMD160;
my $rip = Crypt::RIPEMD160->new;
$rip->reset;
$rip->add($bin_pubkey);
my $checksum = $rip->digest;
$rip->reset;
$rip->add('');
$self->{public_posting_key} = "STM".Steemit::Base58::encode_base58($bin_pubkey.substr($checksum,0,4));
}
return $self->{public_posting_key}
}
sub _transform_private_key {
my( $self ) = @_;
die "posting_key missing" unless( $self->posting_key );
my $base58 = $self->posting_key;
require Steemit::Base58;
my $binary = Steemit::Base58::decode_base58( $base58 );
my $version = substr( $binary, 0, 1 );
my $binary_private_key = substr( $binary, 1, -4);
my $checksum = substr( $binary, -4);
die "invalid version in wif ( 0x80 needed ) " unless $version eq pack "H*", '80';
require Digest::SHA;
my $generated_checksum = substr( Digest::SHA::sha256( Digest::SHA::sha256( $version.$binary_private_key )), 0, 4 );
die "invalid checksum " unless $generated_checksum eq $checksum;
return $binary_private_key;
}
sub _serialize_transaction_message {
my ($self,$transaction) = @_;
my $serialized_transaction;
$serialized_transaction .= pack 'v', $transaction->{ref_block_num};
$serialized_transaction .= pack 'V', $transaction->{ref_block_prefix};
require Date::Calc;
#2016-08-08T12:24:17
my @dates = split /\D/, $transaction->{expiration} ;
my $epoch = Date::Calc::Date_to_Time( @dates);
$serialized_transaction .= pack 'L', $epoch;
$serialized_transaction .= pack "C", scalar( @{ $transaction->{operations} });
require Steemit::OperationSerializer;
my $op_ser = Steemit::OperationSerializer->new;
for my $operation ( @{ $transaction->{operations} } ) {
my ($operation_name,$operations_parameters) = @$operation;
$serialized_transaction .= $op_ser->serialize_operation(
$operation_name,
$operations_parameters,
);
}
#extentions in case we realy need them at some point we will have to implement this is a less nive way ;)
die "extentions not supported" if $transaction->{extensions} and $transaction->{extensions}[0];
$serialized_transaction .= pack 'H*', '00';
return pack( 'H*', ( '0' x 64 )).$serialized_transaction;
}
=head1 REPOSITORY
L<https://github.com/snkoehn/perlSteemit>
=head1 AUTHOR
snkoehn, C<< <snkoehn at cpan.org> >>
=head1 BUGS
Please report any bugs or feature requests to C<bug-steemit at rt.cpan.org>, or through
the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Steemit::WsClient>. I will be notified, and then you'll
automatically be notified of progress on your bug as I make changes.
=head1 SUPPORT
You can find documentation for this module with the perldoc command.
perldoc Steemit::WsClient
You can also look for information at:
=over 4
=item * RT: CPAN's request tracker (report bugs here)
L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Steemit::WsClient>
=item * AnnoCPAN: Annotated CPAN documentation
L<http://annocpan.org/dist/Steemit::WsClient>
=item * CPAN Ratings
L<http://cpanratings.perl.org/d/Steemit::WsClient>
=item * Search CPAN
L<http://search.cpan.org/dist/Steemit::WsClient/>
=back
=head1 ACKNOWLEDGEMENTS
=head1 LICENSE AND COPYRIGHT
Copyright 2018 snkoehn.
This program is free software; you can redistribute it and/or modify it
under the terms of the the Artistic License (2.0). You may obtain a
copy of the full license at:
L<http://www.perlfoundation.org/artistic_license_2_0>
Any use, modification, and distribution of the Standard or Modified
Versions is governed by this Artistic License. By using, modifying or
distributing the Package, you accept this license. Do not use, modify,
or distribute the Package, if you do not accept this license.
If your Modified Version has been derived from a Modified Version made
by someone other than you, you are nevertheless required to ensure that
your Modified Version complies with the requirements of this license.
This license does not grant you the right to use any trademark, service
mark, tradename, or logo of the Copyright Holder.
This license includes the non-exclusive, worldwide, free-of-charge
patent license to make, have made, use, offer to sell, sell, import and
otherwise transfer the Package with respect to any patent claims
licensable by the Copyright Holder that are necessarily infringed by the
Package. If you institute patent litigation (including a cross-claim or
counterclaim) against any party alleging that the Package constitutes
direct or contributory patent infringement, then this Artistic License
to you shall terminate on the date that such litigation is filed.
Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER
AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY
YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR
CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
=cut
1; # End of Steemit::WsClient