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@@ -1,429 +0,0 @@
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-# Pascal Coin: P2P Cryptocurrency without need of historical operations.
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-
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-Copyright (c) 2016 Albert Molina
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-
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-THIS IS EXPERIMENTAL SOFTWARE. Use it for educational purposes only.
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-
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-This software is a Node of the Pascal Coin P2P Cryptocurrency.
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-It can be used to Mine and Explore blocks and operations.
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-
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-Distributed under the MIT software license, see the accompanying file
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-LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
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-
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-This product includes software developed by the OpenSSL Project and Denis
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-Grinyuk (https://github.com/Arvur/OpenSSL-Delphi), and some
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-cryptographic functions inspirated in code written by Ladar Levison and
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-Marco Ferrante.
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-Original source code is written in Pascal Language and is available at
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-https://github.com/PascalCoin/PascalCoin
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-
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-
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-## HOW TO COMPILE:
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-
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-See instructions at GitHub Wiki: https://github.com/PascalCoin/PascalCoin/wiki
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-
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-
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-Enjoy Pascal Coin!
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-
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-## Donations
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-
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-If you like it, consider a donation using BitCoin:
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-16K3HCZRhFUtM8GdWRcfKeaa6KsuyxZaYk
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-
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-Also, consider a donation at PascalCoin development account: "0-10"
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-
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-## History:
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-
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-### Future Build 2.1.4 - 2017-12-22
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-- Pending operations buffer cached to file to allow daemon/app restart without losing pending operations
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-- Less memory usage thanks to a Public keys centralised buffer
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-- JSON-RPC changes
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- - Added param "n_operation" to "Operation Object" JSON-RPC call
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- - New method "findnoperation": Search an operation made to an account based on n_operation field
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- - Params:
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- - "account" : Account
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- - "n_operation" : n_operation field (n_operation is an incremental value to protect double spend)
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- - Result:
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- - If success, returns an Operation Object
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- - New method "findnoperations": Search an operation made to an account based on n_operation
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- - Params:
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- - "account" : Account
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- - "n_operation_min" : Min n_operation to search
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- - "n_operation_max" : Max n_operation to search
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- - "start_block" : (optional) Block number to start search. 0=Search all, including pending operations
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- - Result:
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- - If success, returns an array of Operation Object
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- - New method "decodeophash": Decodes block/account/n_operation info of a 32 bytes ophash
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- - Params:
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- - "ophash" : HEXASTRING with an ophash (ophash is 32 bytes, so must be 64 hexa valid chars)
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- - Result:
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- - "block" : Integer. Block number. 0=unknown or pending
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- - "account" : Integer. Account number
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- - "n_operation" : Integer. n_operation used by the account. n_operation is an incremental value, cannot be used twice on same account.
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- - "md160hash" : HEXASTRING with MD160 hash
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-- Solved bug that caused to delete blockchain when checking memory
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-- Minor optimizations
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-
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-### Build 2.1.3.0 - 2017-11-15
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-- Fixed BUG when buying account assigning an invalid public key
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-- Added maxim value to node servers buffer, deleting old node servers not used, this improves speed
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-- Re-add orphaned operations back into the pending pool
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-- RPC locking to prevent N_Operation race-condition on concurrent invocations
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-- Minor bugs
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-
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-### Build 2.1.2.0 - 2017-07-27
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-- No more blockchain in installer = TRUE DELETABLE BLOCKCHAIN (Safebox will be automatically downloaded by client from network)
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-- Fixed storage bug when downloading a new safebox
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-- Safebox will be downloaded in small chunks (aprox 2mb per chunk)
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-- Read safebox file improvements (quick start)
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-
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-### Build 2.1.1.0 - 2017-07-16
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-- Fixed installer bug: In last Windows installer a malformed safebox file was included. This build is only to provide a good safebox file with the installer
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-- No important changes in exe/binary file
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-
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-### Build 2.1.0.0 - 2017-07-14
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-- Fixed bug of slow mass transactions from a single account due to incorrect sending order
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-- Fixed memory leak on GetSafeBox request call
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-- Added new GUI improvements on Operations form
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-
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-### Build 2.0.0.0 - 2017-06-23
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-- MANDATORY UPGRADE - HARD FORK ACTIVATION WILL OCCUR ON BLOCK 115000
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-- Introducing Protocol v2.
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- - https://github.com/PascalCoin/PascalCoin/blob/master/PascalCoinWhitePaperV2.pdf
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- - Core Changes:
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- - New safebox hash calculation algorithm to allow safebox checkpointing
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- - Improved difficulty target calculation to obtain a more stable average blocktime of 5 minutes, given abrupt hashpower fluctuations
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- - Bug-fix for China region users
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- - Anti-spam measures
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- - New Consensus Rule: A block can only contain 1 zero fee operation per sender account. If a sender account issues 2 or more zero-fee operations, that block is invalid.
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- - SafeBox now stored in chunks to facilitate checkpoint distribution
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- - Reintroduce orphan blocks operations on main blockchain
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- - Added Checkpointing:
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- - Checkpoint created on every 100'th block
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- - Added network operations to transfer Checkpoint chunks (compressed)
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- - Addded In-Protocol PASA Exchanging:
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- - New Operation: List Account, used to list an account for public or private sale
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- - New Operation: Delist Account, used to delist an account from sale
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- - New Operation: Buy Account, used to purchase an account lised for sale
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- - Updated Operation: Transaction, can be used in place of Buy Account operation in private account sales
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- - RPC API Changes:
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- - All changes are backwards-compatible for current 3rd-party infrastructure providers (exchanges, wallets).
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- - However, use of param "ophash" has been changed in V2, see "Operation Object changes" section to know how to use "old_ophash" param value
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- - JSON changes:
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- - Account Object changes:
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- - Added param "state" (values can be "normal" or "listed". When listed then account is for sale)
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- - If "state" is "listed" then will fill next values:
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- - "locked_until_block", "price", "seller_account"
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- - "private_sale" : Boolean value
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- - "new_enc_pubkey" : (Only on "private_sale" = true) - HEXASTRING with private sale encoded public key
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- - Added param "name": String
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- - Name available chars: abcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-+{}[]\_:"|<>,.?/~
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- - Name first char: (cannot start with number): abcdefghijklmnopqrstuvwxyz!@#$%^&*()-+{}[]\_:"|<>,.?/~
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- - Name lenght: Empty or 3..64 chars length
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- - Added param "type": Integer (Valid values from 0..65535)
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- - Operation Object changes:
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- - Changed param "ophash": Current returned value of "ophash" is not the same than previous builds (changed calculation method)
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- - New param "old_ophash": Will return previous "ophash" value only for old blocks (prior to v2 protocol activation)
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- - New param "subtype" : Based on "optype" param, this param allows to discrimine point of view of operation (sender/receiver/buyer/seller ...)
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- - New param "signer_account" : Will return the account that signed (and payed fee) for this operation
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- - Param "enc_pubkey": Will return both change key and the private sale public key value
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- - About method "findoperation" and "ophash"
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- - Due to changed "ophash" param value calculation, method "findoperation" will find old "ophash" values too
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- - This is to avoid 100% compatibility, but remember that returned "Operation object" will contain "ophash" value calculated in new format only (you can read "old_ophash" value in older blocks)
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- - New methods:
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- - "listaccountforsale" : Lists an account for sale (public or private)
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- - Params:
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- - "account_target" : Account to be listed
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- - "account_signer" : Account that signs and pays the fee (must have same public key that listed account, or be the same)
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- - "price": price account can be purchased for
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- - "seller_account" : Account that will receive "price" amount on sell
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- - "new_b58_pubkey"/"new_enc_pubkey": If used, then will be a private sale
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- - "locked_until_block" : Block number until this account will be locked (a locked account cannot execute operations while locked)
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- - "fee","payload","payload_method","pwd"
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- - "signlistaccountforsale" : Signs a List an account for sale (public or private) for cold wallets
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- - Params: Same "listaccountforsale" params, and also:
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- - "rawoperations" : HEXASTRING with previous signed operations (optional)
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- - "signer_b58_pubkey"/"signer_enc_pubkey" : The current public key of "account_signer"
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- - "last_n_operation" : The current n_operation of signer account
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- - "delistaccountforsale" : Delist an account for sale
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- - Params:
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- - "account_target" : Account to be delisted
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- - "account_signer" : Account that signs and pays the fee (must have same public key that delisted account, or be the same)
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- - "fee","payload","payload_method","pwd"
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- - "signdelistaccountforsale" : Signs a List an account for sale (public or private) for cold wallets
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- - Params: Same "delistaccountforsale" params, and also:
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- - "rawoperations" : HEXASTRING with previous signed operations (optional)
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- - "signer_b58_pubkey"/"signer_enc_pubkey" : The current public key of "account_signer"
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- - "last_n_operation" : The current n_operation of signer account
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- - "buyaccount" : Buy an account previously listed for sale (public or private)
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- - Params:
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- - "buyer_account","account_to_purchase",
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- - "price","seller_account",
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- - "new_b58_pubkey"/"new_enc_pubkey","amount",
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- - "fee","payload","payload_method","pwd"
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- - "signbuyaccount" : Signs a buy operation for cold wallets
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- - Params: Same "buyaccount" params, and also:
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- - "rawoperations" : HEXASTRING with previous signed operations (optional)
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- - "signer_b58_pubkey"/"signer_enc_pubkey" : The current public key of "buyer_account"
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- - "last_n_operation" : The current n_operation of buyer account
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- - "changeaccountinfo" : Changes an account Public key, or name, or type value (at least 1 on 3)
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- - Params:
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- - "account_target" : Account to be delisted
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- - "account_signer" : Account that signs and pays the fee (must have same public key that target account, or be the same)
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- - "new_b58_pubkey"/"new_enc_pubkey": If used, then will change the target account public key
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- - "new_name": If used, then will change the target account name
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- - "new_type": If used, then will change the target account type
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- - "fee","payload","payload_method","pwd"
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- - "signchangeaccountinfo" : Signs a change account info for cold cold wallets
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- - Params: Same "changeaccountinfo" params, and also:
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- - "rawoperations" : HEXASTRING with previous signed operations (optional)
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- - "signer_b58_pubkey"/"signer_enc_pubkey" : The current public key of "account_signer"
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- - "last_n_operation" : The current n_operation of signer account
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- - "findaccounts" : Find accounts by name/type and returns them as an array of Account objects
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- - Returned array will be sorted by account number
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- - Params:
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- - "name" : (String) If has value, will return the account that match name
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- - "type" : (Integer) If has value, will return accounts with same type
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- - "start" : (Integer) Start account (by default, 0)
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- - "max" : (Integer) Max of accounts returned in array (by default, 100)
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- - Updated methods:
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- - "changekey" : Added param "account_signer" that allow to pay fee using another account with same public key than target "account" param. This allows to change keys on empty accounts (balance = 0) and pay fee
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- - "signchangekey" : Added param "account_signer", same use that in "changekey" method
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- - GUI changes: (not available on daemon)
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- - New columns "name" and "type" on accounts
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- - Information about Accounts/Operation using F1
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- - Operations form now accepts: (Will be active after V2 protocol activation)
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- - List account for sale (public or private)
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- - Delist account
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- - Buy account
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- - Change account name/type
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- - Operations form allows to search for accounts using F2 over an account edit box
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- - Changes in text showing operations information
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-- Other changes:
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- - Bug for china users fixed
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- - Bugs fixed
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-
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-### Build 1.5.6.0 - 2017-05-03
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-- Allow multiselect accounts (GUI wallet)
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-- Priority for operations with fee:
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- - Allow miner server (pools) to select what to mine using pascalcoin_daemon.ini file (daemon only)
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- - RPC_SERVERMINER_MAX_OPERATIONS_PER_BLOCK: Max of operations that can be included in a block (Default 5000, min value 1000)
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- - RPC_SERVERMINER_MAX_ZERO_FEE_OPERATIONS: Max of operations with 0 fee that can be included in a block (Default 2000, min value 400)
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- - Operations with fee have always preference over 0 fee operations (will be mined first)
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- - If operations with fee fills all the buffer, then no zero fee operation will be included
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-- Fixed bug on receiving big blocks and slow net connection to prevent never synchronize
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-- Fixed bug on miner server that produces "invalid operations hash" error on valid solutions with 0 operations
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-- Fixed bug on file storage
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-- Fixed minor bugs
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-
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-### Build 1.5.5.0 - 2017-04-11
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-- Corrected fee result on RPC calls as a negative number on "Change key" operations
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-- Corrected PASCURRENCY value to be limited as a 4 decimal digits on RPC calls
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-- JSON-RPC method "getaccountoperations" changed: if param "start" is -1, will include pending operations, otherwise not
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-- Fixed bug: On "getaccountoperations" if an account had a lot of operations (receive tx included) then sometimes app crashed when executing depth search.
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- - Note: High depth search is slow because it search always starting from current state, going backwards, in order to return past balance. This can be a slow method on some account with high transactions volume.
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-
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-### Build 1.5.4.0 - 2017-03-14
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-- Added Network Timestamp Adjustment (NAT) to calc valid timestamps
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- - Minimum 4 active connections to calc median used for NAT, otherwise use local timestamp
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- - Based on IP's (to prevent a malicious IP timejacking, each IP is only used once)
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- - Removed IP's and recalculated after disconnecting (to prevent malicious node connecting/disconnecting for timejacking)
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-- New blocks will not be accepted if using future timestamp greater than NAT timestamp + 15 seconds (also, mantaining current protocol rule >= lastBlock.timestamp)
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-- Network protocol fixed to 5-5 (Nodes with version prior to 1.5 will not be allowed)
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-- Added protection for non included operations on a block, to prevent continuous sending. Only will resend operations once.
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-- Bug #27 fixed: Invalid timestamp on FPC (https://github.com/PascalCoin/PascalCoin/issues/27)
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-- JSON-RPC
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- - Method "getconnections" added "timediff" to know timestamp diff of node
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- - Method "payloaddecrypt" added "unenc_hexpayload" result value with HEXASTRING of unencrypted payload
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-- Fixed some "Random Memory access violation errors" bugs found caused by multithreading and disconnected nodes
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-
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-### Build 1.5.3.0 - 2017-03-06
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-
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-- Fixed issue #23: RPC findoperation fails to find operation by opHash
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-- Miners best practices: Sending new job with new timestamp every 30 seconds
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-- Buffering last 10 sent jobs to miners
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-- Small delay prior to destroy a connection to prevent exception handling
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-- Minor logs changes
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-
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-
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-### Build 1.5.2.0 - 2017-03-03
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-
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-- Added a jobs buffer for miners. This will allow to submit old job solutions (limited buffer). (Fix the "tx" issue)
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-- Miner jobs will not be sent every time a transaction is received, thet will be buffered and sent every few seconds (Fix the "tx" issue)
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-- Better network performance, allowing more operations and nodes thanks to buffering before relaying
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-- Daemon: Allow select on ini file how many connections can handle
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-- Fixed a locking when deleting connections
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-
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-### Build 1.5.1.0 - 2017-02-20
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-
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-- Memory leak fixed on RPC-JSON commands
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-- Memory leak fixed on node connections
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-- Improved network speed processing new blocks/operations
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-- Some minor bugs
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-
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-### Build 1.5.0.0 - 2017-02-15
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-
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-- Net protocol upgrade to 4-5
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-- Introducing "more work" with high priority than "more high". Work is calculated based on target. Higher target (more work) is more important than higher length
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-- Solved locking/crash bug on high connections (caused by bad thread locking)
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-- Improved network connection
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-- Added JSON-RPC port 4003 protection Whitelist (only allowed IP's can use JSON-RPC)
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-
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-
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-### Build 1.4.3.0 - 2017-02-02
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-
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-- Adding "maturation" param to "JSON Operation object", return null when operation is not included on a blockchain yet, 0 means that is included in highest block and so on...
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-- Fixing miner timestamp value to prevent invalid time
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-
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-### Build 1.4.2.0 - 2017-01-23
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-
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-- Max JSON-RPC miner connections is now 1000 (before, 10)
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-- JSON-RPC miner enabled at pascalcoin_daemon (linux daemon)
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-- Screen messages for daemon
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-- pascalcoin_daemon.ini file for daemon
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-
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-### Build 1.4.1.0 - 2017-01-18
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-
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-- Improved JSON communications with Miner client (Port 4009 by default)
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-- Deleted adding numeration to JSON miner clients (only sends miner name)
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-- Minor changes
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-
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-### Build 1.4.0.0 - 2016-12-30
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-
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-- JSON-RPC changes:
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- - Added method "signsendto" to allow a off-line wallet sign transaction operations without being syncrhonized
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- - Added method "signchangekey" to allow a off-line wallet sign change key operations without being syncrhonized
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- - Added method "executeoperations" to allow a on-line wallet execute operations signed off-line
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- - Added method "operationsinfo" that will decode operations signed off-line
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- - Added param "max" at JSON-RPC method "getblocks"
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- - Changed param name "deep" for "depht" in "getaccountoperations". Deep will be available for compatibility.
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- - Changed result for "changekeys". Now returns a "JSON operation object" array with each change key operation result
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- - Changes on "JSON Operation object": May return a "valid" param and "errors" param
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-- Corrected a memory leak when processing JSON-RPC calls
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-- Better performance in connection protocol
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-- Updated protocol available to 1
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-- Updated net protocol to 3-4
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-- Important bug corrected
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-
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-### Build 1.3.0.0 - 2016-11-24
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-
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-- JSON-RPC modifications:
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- - New param "b58_pubkey", can be used instead of "enc_pubkey": b58_pubkey is a Base58 encoded public key with checksum, is the value that Wallet exports/imports public key
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- - New JSON object type Public Key: "name","can_use","enc_pubkey","b58_pubkey","ec_nid","x" and "y" for each public key
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- - Added params "start" and "max" to "getaccountoperations". By default deep=100, max=100 and start=0, so will return last 100 operations made to an account
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- - Added params "start" and "max" to "getblockoperations". By default max=100 and start=0, so will return last 100 operations made to a block
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- - Added params "start" and "max" to "getwalletaccounts". By default max=100 and start=0, so will return first 100 accounts of the wallet
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- - Added params "start" and "max" to "getwalletpubkeys". By default max=100 and start=0, so will return first 100 public keys of the wallet
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- - Will return a Public key JSON object
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- - Method "decodepubkey" allows params "enc_pubkey" or "b58_pubkey" (if used together, returns error if not match)
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- - Will return a Public key JSON object
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- - Method "changekey" allows params "new_enc_pubkey" or "new_b58_pubkey" (if used together, returns error if not match)
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- - Method "getwalletaccounts" allows params "enc_pubkey" or "b58_pubkey" (if used together, returns error if not match)
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- - Method "getwalletaccountscount" allows params "enc_pubkey" or "b58_pubkey" (if used together, returns error if not match)
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- - Method "getwalletcoins" allows params "enc_pubkey" or "b58_pubkey" (if used together, returns error if not match)
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- - Method "payloadencrypt" allows params "enc_pubkey" or "b58_pubkey" when payload_method="pubkey" (if used together, returns error if not match)
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- - Method "addnewkey" changed. Does not return an HEXASTRING with enc_pubkey, now returns a public key JSON object
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- - New methods:
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- - Method "changekeys". Similar to "changekey" but for multiple accounts at param "accounts" as a coma separated string (ex: "accounts"="1248,1753,85056"). Returns a JSON object with result information
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- - Method "lock" to lock wallet. Returns true if locked, returns false if wallet has no password (an empty string, must put a new password prior to lock)
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- - New method "getwalletpubkey". Search for "enc_pubkey" or "b58_pubkey" and returns a Public key JSON object
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-- Corrected a issue saving last 5 .bank files
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-- Improved protections for .bank corruption files
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-- Added "open data folder" button on options form
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-- Other minor changes
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-
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-### Build 1.2.0.0 - 2016-11-16
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-
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-- Account checksum values modified to be more easy and more distributed: Checksum = ((N * 101) MOD 89)+10
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-- Allow find operations by "ophash"
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-- Show Operation "ophash" in operation payload decoder
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-- Added param "enc_pubkey" to "getwalletaccounts" JSON-RPC method to return only accounts from this public key
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-- Added params "pow" and "sbh" to "nodestatus" JSON-RPC method
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-- Added method "getwalletaccountscount" returning accounts count of the entire wallet or for a single "enc_pubkey"
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-- Added method "getwalletcoins" returning coins of the entire wallet or for a signle "enc_pubkey"
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-- Modified seed nodes distribution to send only checked IP nodes
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-- Corrected invalid operation block index when showing account operations
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-
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-
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-### Build 1.1.0.0 - 2016-11-03
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-
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-- JSON-RPC Server included
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-- Minor changes
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-
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-
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-### Build 1.0.9.0 - 2016-10-21
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-
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-- Corrected a BUG (BUG-101) that causes blocking connections when received more than 100 connections, causing "alone in the world" after a cert period time.
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-- It's necessary to update because new version will refuse old versions to make network stable.
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-
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-
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-### Build 1.0.8.0 - 2016-10-20
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-
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-- Cross compatible
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-- Can compile with Delphi or Lazarus (Free Pascal)
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-- New storage system. No more access database
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-- Network hashrate calculation
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-
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-
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-### Build 1.0.7.0 - 2016-10-10
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-
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-- Introducing basic JSON-RPC to allow GPU miners development (Third party).
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-- See file "HOWTO_DEVELOP_GPU_MINER_FOR_PASCALCOIN.txt"
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-- No more CPU mining due exists GPU mining
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-
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-
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-### Build 1.0.6.0 - 2016-10-04
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-
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-- Memory leaks corrections
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-- Introducing net protocol 2-3
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-- Source code modified, next build will be compiled with Lazarus and FPC
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-
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-
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-### Build 1.0.5.0 - 2016-09-21
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-
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-- Massive operations, selecting multiple accounts
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-- Filter accounts by balance
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-- Correct operations explorer order of operations for each block (descending order)
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-- Minor changes
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-
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-
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-### Build 1.0.4.0 - 2016-09-16
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-
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-- IMPORTANT: Introducing net protocol changes: Must update!
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-- More and more and more stable
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-- Prevents "Alone in the world" if everybody is updated ;-)
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-- Invalid local time detector with corrections
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-- IP nodes configurator
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-
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-
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-### Build 1.0.3.0 - 2016-09-08
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-
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-- Important changes to database
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-- Peer cache
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-- Issues with Connections
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-- More stable
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-- Miner key selector
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-- Invalid local time detector
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-
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-
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-### Build 1.0.2.0 - 2016-08-31
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-
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-- Improved hashing speed
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-- Allow mining without opening external ports
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-- Choose how many CPU's want to mine
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-- Show real-time pending operations waiting to be included in the block
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-- More stable
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-- Some miner modifications
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-
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-### Build 1.0.1.0 - 2016-08-12
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-
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-- Included an option to Import/Export Wallet keys file
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-- Some miner modifications
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-
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-
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-### Build 1.0.0.0 - 2016-08-11
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-
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-- First stable version.
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-- Created with Genesis block hardcoded
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-- Published at same time than Genesis block. NO PREMINE
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PascalCoin