d1c3c7a698
1. Implement a TaPoS assert operation predicate that offers full block ID validation for transactions that want the added security. This is only required for transactions that are of high value and transfer control of funds to a newly created identifier and where the witnesses cannot be trusted. 2. Remove the full block ID from the transaction digest generation.
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
#pragma once
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#include <graphene/chain/protocol/base.hpp>
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namespace graphene { namespace chain {
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/**
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* Used to verify that account_id->name is equal to the given string literal.
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*/
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struct account_name_eq_lit_predicate
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{
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account_id_type account_id;
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string name;
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/**
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* Perform state-independent checks. Verify
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* account_name is a valid account name.
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*/
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bool validate()const;
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};
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/**
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* Used to verify that asset_id->symbol is equal to the given string literal.
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*/
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struct asset_symbol_eq_lit_predicate
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{
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asset_id_type asset_id;
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string symbol;
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/**
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* Perform state independent checks. Verify symbol is a
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* valid asset symbol.
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*/
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bool validate()const;
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};
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/**
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* Used to verify that a specific block is part of the
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* blockchain history. This helps protect some high-value
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* transactions to newly created IDs
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*
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* The block ID must be within the last 2^16 blocks.
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*/
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struct block_id_predicate
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{
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block_id_type id;
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bool validate()const{ return true; }
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};
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/**
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* When defining predicates do not make the protocol dependent upon
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* implementation details.
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*/
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typedef static_variant<
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account_name_eq_lit_predicate,
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asset_symbol_eq_lit_predicate,
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block_id_predicate
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> predicate;
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/**
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* @brief assert that some conditions are true.
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* @ingroup operations
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*
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* This operation performs no changes to the database state, but can but used to verify
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* pre or post conditions for other operations.
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*/
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struct assert_operation : public base_operation
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{
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struct fee_parameters_type { uint64_t fee = GRAPHENE_BLOCKCHAIN_PRECISION; };
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asset fee;
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account_id_type fee_paying_account;
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vector<predicate> predicates;
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flat_set<account_id_type> required_auths;
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extensions_type extensions;
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account_id_type fee_payer()const { return fee_paying_account; }
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void validate()const;
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share_type calculate_fee(const fee_parameters_type& k)const;
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};
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} } // graphene::chain
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FC_REFLECT( graphene::chain::assert_operation::fee_parameters_type, (fee) )
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FC_REFLECT( graphene::chain::account_name_eq_lit_predicate, (account_id)(name) )
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FC_REFLECT( graphene::chain::asset_symbol_eq_lit_predicate, (asset_id)(symbol) )
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FC_REFLECT( graphene::chain::block_id_predicate, (id) )
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FC_REFLECT_TYPENAME( graphene::chain::predicate )
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FC_REFLECT( graphene::chain::assert_operation, (fee)(fee_paying_account)(predicates)(required_auths)(extensions) )
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