| operation_identifierobjectThe operation_identifier uniquely identifies an operation within a transaction.| indexintegerThe operation index is used to ensure each operation has a unique identifier within a transaction. This index is only relative to the transaction and NOT GLOBAL. The operations in each transaction should start from index 0. To clarify, there may not be any notion of an operation index in the blockchain being described. |  | network_indexinteger —  OPTIONALSome blockchains specify an operation index that is essential for client use. For example, Bitcoin uses a network_index to identify which UTXO was used in a transaction. network_index should not be populated if there is no notion of an operation index in a blockchain (typically most account-based blockchains). | 
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| related_operationsobject[] —  OPTIONALRestrict referenced related_operations to identifier indexes < the current operation_identifier.index. This ensures there exists a clear DAG-structure of relations. Since operations are one-sided, one could imagine relating operations in a single transfer or linking operations in a call tree.| indexintegerDescribes the index of related operation. |  | network_indexinteger —  OPTIONALSome blockchains specify an operation index that is essential for client use. network_index should not be populated if there is no notion of an operation index in a blockchain (typically most account-based blockchains). | 
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| typestringThe network-specific type of the operation. Ensure that any type that can be returned here is also specified in the NetworkStatus. This can be very useful to downstream consumers that parse all block data. | 
| statusstring —  OPTIONALThe network-specific status of the operation. Status is not defined on the transaction object because blockchains with smart contracts may have transactions that partially apply. Blockchains with atomic transactions (all operations succeed or all operations fail) will have the same status for each operation. | 
| accountobject —  OPTIONALThe account_identifier uniquely identifies an account within a network. All fields in the account_identifier are utilized to determine this uniqueness (including the metadata field, if populated).| addressstringThe address may be a cryptographic public key (or some encoding of it) or a provided username. |  | sub_accountobject —  OPTIONALAn account may have state specific to a contract address (ERC-20 token) and/or a stake (delegated balance). The sub_account_identifier should specify which state (if applicable) an account instantiation refers to.| addressstringThe address may be a cryptographic public key (or some encoding of it) or a provided username. |  | metadataobject —  OPTIONALIf the SubAccount address is not sufficient to uniquely specify a SubAccount, any other identifying information can be stored here. It is important to note that two SubAccounts with identical addresses but differing metadata will not be considered equal by clients. | 
 |  | metadataobject —  OPTIONALBlockchains that utilize a username model (where the address is not a derivative of a cryptographic public key) should specify the public key(s) owned by the address in metadata. | 
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| amountobject —  OPTIONALAmount is some Value of a Currency. It is considered invalid to specify a Value without a Currency.| valuestringValue of the transaction in atomic units represented as an arbitrary-sized signed integer. For example, 1 BTC would be represented by a value of 100000000. |  | currencyobjectCurrency is composed of a canonical Symbol and Decimals. This Decimals value is used to convert an Amount.Value from atomic units (Satoshis) to standard units (Bitcoins).| symbolstringCanonical symbol associated with a currency. |  | decimalsintegerNumber of decimal places in the standard unit representation of the amount. For example, BTC has 8 decimals. Note that it is not possible to represent the value of some currency in atomic units that is not base 10. |  | metadataobject —  OPTIONALAny additional information related to the currency itself. For example, it would be useful to populate this object with the contract address of an ERC-20 token. | 
 |  | metadataobject —  OPTIONAL | 
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| coin_changeobject —  OPTIONALCoinChange is used to represent a change in state of a some coin identified by a coin_identifier. This object is part of the Operation model and must be populated for UTXO-based blockchains. Coincidentally, this abstraction of UTXOs allows for supporting both account-based transfers and UTXO-based transfers on the same blockchain (when a transfer is account-based, don't populate this model).| coin_identifierobjectCoinIdentifier uniquely identifies a Coin.| identifierstringIdentifier should be populated with a globally unique identifier of a Coin. In Bitcoin, this identifier would be transaction_hash:index. | 
 |  | coin_actionstringPossible values: [coin_created,coin_spent]CoinActions are different state changes that a Coin can undergo. When a Coin is created, it is coin_created. When a Coin is spent, it is coin_spent. It is assumed that a single Coin cannot be created or spent more than once. | 
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| metadataobject —  OPTIONAL |