55 lines
1.7 KiB
Go
55 lines
1.7 KiB
Go
package watched_contracts
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import (
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"errors"
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"fmt"
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"github.com/8thlight/vulcanizedb/pkg/core"
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"github.com/8thlight/vulcanizedb/pkg/repositories"
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)
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type ContractSummary struct {
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ContractHash string
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NumberOfTransactions int
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LastTransaction *core.Transaction
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blockChain core.Blockchain
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Attributes []core.ContractAttribute
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}
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var NewContractNotWatchedErr = func(contractHash string) error {
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return errors.New(fmt.Sprintf("Contract %v not being watched", contractHash))
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}
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func NewSummary(blockchain core.Blockchain, repository repositories.Repository, contractHash string) (*ContractSummary, error) {
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watchedContract := repository.FindWatchedContract(contractHash)
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if watchedContract != nil {
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return newContractSummary(blockchain, *watchedContract), nil
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} else {
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return nil, NewContractNotWatchedErr(contractHash)
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}
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}
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func (contractSummary ContractSummary) GetStateAttribute(attributeName string) string {
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result, _ := contractSummary.blockChain.GetContractStateAttribute(contractSummary.ContractHash, attributeName)
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return *result
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}
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func newContractSummary(blockchain core.Blockchain, watchedContract core.WatchedContract) *ContractSummary {
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attributes, _ := blockchain.GetContractAttributes(watchedContract.Hash)
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return &ContractSummary{
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blockChain: blockchain,
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ContractHash: watchedContract.Hash,
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NumberOfTransactions: len(watchedContract.Transactions),
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LastTransaction: lastTransaction(watchedContract),
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Attributes: attributes,
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}
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}
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func lastTransaction(contract core.WatchedContract) *core.Transaction {
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if len(contract.Transactions) > 0 {
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return &contract.Transactions[0]
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} else {
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return nil
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}
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}
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