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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package generator
import (
"io"
"time"
"github.com/algorand/go-algorand/config"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/data/bookkeeping"
txn "github.com/algorand/go-algorand/data/transactions"
"github.com/algorand/go-algorand/ledger"
"github.com/algorand/go-algorand/logging"
"github.com/algorand/go-algorand/protocol"
)
// Generator is the interface needed to generate blocks.
type Generator interface {
WriteReport(output io.Writer) error
WriteGenesis(output io.Writer) error
WriteBlock(output io.Writer, round uint64) error
WriteAccount(output io.Writer, accountString string) error
WriteDeltas(output io.Writer, round uint64) error
WriteStatus(output io.Writer) error
Stop()
}
type generator struct {
verbose bool
log logging.Logger
config GenerationConfig
// payment transaction metadata
numPayments uint64
// Number of algorand accounts
numAccounts uint64
// Block stuff
round uint64
txnCounter uint64
prevBlockHash string
timestamp int64
protocol protocol.ConsensusVersion
params config.ConsensusParams
genesis bookkeeping.Genesis
genesisID string
genesisHash crypto.Digest
// Rewards stuff
feeSink basics.Address
rewardsPool basics.Address
rewardsLevel uint64
rewardsResidue uint64
rewardsRate uint64
rewardsRecalculationRound uint64
// balances for all accounts. To avoid crypto and reduce storage, accounts are faked.
// The account is based on the index into the balances array.
balances []uint64
// assets is a minimal representation of the asset holdings, it doesn't
// include the frozen state.
assets []*assetData
// pendingAssets is used to hold newly created assets so that they are not used before
// being created.
pendingAssets []*assetData
// pendingAppMap provides a live mapping from appID to appData for each appKind
// for the current round
pendingAppMap map[appKind]map[uint64]*appData
// pendingAppSlice provides a live slice of appData for each appKind. The reason
// for maintaining both appMap and pendingAppSlice is to enable
// randomly selecting an app to interact with and yet easily access it once
// its identifier is known
pendingAppSlice map[appKind][]*appData
// appMap and appSlice store the information from their corresponding pending*
// data structures at the end of each round and for the rest of the experiment
appMap map[appKind]map[uint64]*appData
appSlice map[appKind][]*appData
// accountAppOptins is used to keep track of which accounts have opted into
// and app and enable random selection.
accountAppOptins map[appKind]map[uint64][]uint64
transactionWeights []float32
payTxWeights []float32
assetTxWeights []float32
appTxWeights []float32
// Reporting information from transaction type to data
reportData Report
// latestData keeps a count of how many transactions of each
// txType occurred in the current round.
latestData map[TxTypeID]uint64
// ledger
ledger *ledger.Ledger
// latestBlockMsgp caches the latest written block
latestBlockMsgp []byte
// latestPaysetWithExpectedID provides the ordered payest transactions
// together the expected asset/app IDs (or 0 if not applicable)
latestPaysetWithExpectedID []txnWithExpectedID
roundOffset uint64
}
type assetData struct {
assetID uint64
creator uint64
name string
// Holding at index 0 is the creator.
holdings []*assetHolding
// Set of holders in the holdings array for easy reference.
holders map[uint64]*assetHolding
}
type appData struct {
appID uint64
sender uint64
kind appKind
optins map[uint64]bool
}
type assetHolding struct {
acctIndex uint64
balance uint64
}
// Report is the generation report.
type Report struct {
InitialRound uint64 `json:"initial_round"`
Counters map[string]uint64 `json:"counters"`
Transactions map[TxTypeID]TxData `json:"transactions"`
}
// EffectsReport collates transaction counts caused by a root transaction.
type EffectsReport map[string]uint64
// TxData is the generator report data.
type TxData struct {
GenerationTime time.Duration `json:"generation_time_milli"`
GenerationCount uint64 `json:"num_generated"`
}
// TxEffect summarizes a txn type count caused by a root transaction.
type TxEffect struct {
effect string
count uint64
}
// txnWithExpectedID rolls up an expected asset/app ID for non-pay txns
// together with a signedTxn expected to be in the payset.
type txnWithExpectedID struct {
expectedID uint64
signedTxn *txn.SignedTxn
intra uint64
nextIntra uint64
}
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