MESH
- Introduction
- POSTCreate a Request to Fetch Metadata
- POSTCreate Network Transaction from Signatures
- POSTDerive an AccountIdentifier from a PublicKey
- POSTGenerate an Unsigned Transaction and Signing Payloads
- POSTGet Metadata for Transaction Construction
- POSTGet the Hash of a Signed Transaction
- POSTParse a Transaction
- POSTSubmit a Signed Transaction
- POST
curl --request POST \
--url https://example.com/construction/payloads \
--header 'Content-Type: application/json' \
--data '
{
"network_identifier": {
"blockchain": "bitcoin",
"network": "mainnet",
"sub_network_identifier": {
"network": "shard 1",
"metadata": {
"producer": "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"
}
}
},
"operations": [
{
"operation_identifier": {
"index": 5,
"network_index": 0
},
"type": "Transfer",
"related_operations": [
{
"index": 1
},
{
"index": 2
}
],
"status": "Reverted",
"account": {
"address": "0x3a065000ab4183c6bf581dc1e55a605455fc6d61",
"sub_account": {
"address": "0x6b175474e89094c44da98b954eedeac495271d0f",
"metadata": {}
},
"metadata": {}
},
"amount": {
"value": "1238089899992",
"currency": {
"symbol": "BTC",
"decimals": 8,
"metadata": {
"Issuer": "Satoshi"
}
},
"metadata": {}
},
"coin_change": {
"coin_identifier": {
"identifier": "0x2f23fd8cca835af21f3ac375bac601f97ead75f2e79143bdf71fe2c4be043e8f:1"
},
"coin_action": "coin_created"
},
"metadata": {
"asm": "304502201fd8abb11443f8b1b9a04e0495e0543d05611473a790c8939f089d073f90509a022100f4677825136605d732e2126d09a2d38c20c75946cd9fc239c0497e84c634e3dd01 03301a8259a12e35694cc22ebc45fee635f4993064190f6ce96e7fb19a03bb6be2",
"hex": "48304502201fd8abb11443f8b1b9a04e0495e0543d05611473a790c8939f089d073f90509a022100f4677825136605d732e2126d09a2d38c20c75946cd9fc239c0497e84c634e3dd012103301a8259a12e35694cc22ebc45fee635f4993064190f6ce96e7fb19a03bb6be2"
}
}
],
"metadata": {},
"public_keys": [
{
"hex_bytes": "<string>",
"curve_type": "secp256k1"
}
]
}
'{
"unsigned_transaction": "<string>",
"payloads": [
{
"hex_bytes": "<string>",
"address": "<string>",
"account_identifier": {
"address": "0x3a065000ab4183c6bf581dc1e55a605455fc6d61",
"sub_account": {
"address": "0x6b175474e89094c44da98b954eedeac495271d0f",
"metadata": {}
},
"metadata": {}
},
"signature_type": "ecdsa"
}
]
}Generate an Unsigned Transaction and Signing Payloads
Payloads is called with an array of operations and the response from /construction/metadata. It returns an unsigned transaction blob and a collection of payloads that must be signed by particular AccountIdentifiers using a certain SignatureType. The array of operations provided in transaction construction often times can not specify all “effects” of a transaction (consider invoked transactions in Ethereum). However, they can deterministically specify the “intent” of the transaction, which is sufficient for construction. For this reason, parsing the corresponding transaction in the Data API (when it lands on chain) will contain a superset of whatever operations were provided during construction.
curl --request POST \
--url https://example.com/construction/payloads \
--header 'Content-Type: application/json' \
--data '
{
"network_identifier": {
"blockchain": "bitcoin",
"network": "mainnet",
"sub_network_identifier": {
"network": "shard 1",
"metadata": {
"producer": "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"
}
}
},
"operations": [
{
"operation_identifier": {
"index": 5,
"network_index": 0
},
"type": "Transfer",
"related_operations": [
{
"index": 1
},
{
"index": 2
}
],
"status": "Reverted",
"account": {
"address": "0x3a065000ab4183c6bf581dc1e55a605455fc6d61",
"sub_account": {
"address": "0x6b175474e89094c44da98b954eedeac495271d0f",
"metadata": {}
},
"metadata": {}
},
"amount": {
"value": "1238089899992",
"currency": {
"symbol": "BTC",
"decimals": 8,
"metadata": {
"Issuer": "Satoshi"
}
},
"metadata": {}
},
"coin_change": {
"coin_identifier": {
"identifier": "0x2f23fd8cca835af21f3ac375bac601f97ead75f2e79143bdf71fe2c4be043e8f:1"
},
"coin_action": "coin_created"
},
"metadata": {
"asm": "304502201fd8abb11443f8b1b9a04e0495e0543d05611473a790c8939f089d073f90509a022100f4677825136605d732e2126d09a2d38c20c75946cd9fc239c0497e84c634e3dd01 03301a8259a12e35694cc22ebc45fee635f4993064190f6ce96e7fb19a03bb6be2",
"hex": "48304502201fd8abb11443f8b1b9a04e0495e0543d05611473a790c8939f089d073f90509a022100f4677825136605d732e2126d09a2d38c20c75946cd9fc239c0497e84c634e3dd012103301a8259a12e35694cc22ebc45fee635f4993064190f6ce96e7fb19a03bb6be2"
}
}
],
"metadata": {},
"public_keys": [
{
"hex_bytes": "<string>",
"curve_type": "secp256k1"
}
]
}
'{
"unsigned_transaction": "<string>",
"payloads": [
{
"hex_bytes": "<string>",
"address": "<string>",
"account_identifier": {
"address": "0x3a065000ab4183c6bf581dc1e55a605455fc6d61",
"sub_account": {
"address": "0x6b175474e89094c44da98b954eedeac495271d0f",
"metadata": {}
},
"metadata": {}
},
"signature_type": "ecdsa"
}
]
}Body
ConstructionPayloadsRequest is the request to /construction/payloads. It contains the network, a slice of operations, and arbitrary metadata that was returned by the call to /construction/metadata. Optionally, the request can also include an array of PublicKeys associated with the AccountIdentifiers returned in ConstructionPreprocessResponse.
The network_identifier specifies which network a particular object is associated with.
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"bitcoin"
If a blockchain has a specific chain-id or network identifier, it should go in this field. It is up to the client to determine which network-specific identifier is mainnet or testnet.
"mainnet"
In blockchains with sharded state, the SubNetworkIdentifier is required to query some object on a specific shard. This identifier is optional for all non-sharded blockchains.
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The operation_identifier uniquely identifies an operation within a transaction.
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The 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.
x >= 05
Some 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).
x >= 00
Type is the network-specific type of the operation. Ensure that any type that can be returned here is also specified in the NetworkOptionsResponse. This can be very useful to downstream consumers that parse all block data.
"Transfer"
Restrict referenced related_operations to identifier indices < 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.
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The 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.
x >= 05
Some 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).
x >= 00
[{ "index": 1 }, { "index": 2 }]Status is the 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 (some operations are successful and some are not). Blockchains with atomic transactions (all operations succeed or all operations fail) will have the same status for each operation. On-chain operations (operations retrieved in the /block and /block/transaction endpoints) MUST have a populated status field (anything on-chain must have succeeded or failed). However, operations provided during transaction construction (often times called "intent" in the documentation) MUST NOT have a populated status field (operations yet to be included on-chain have not yet succeeded or failed).
"Reverted"
The 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).
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The address may be a cryptographic public key (or some encoding of it) or a provided username.
"0x3a065000ab4183c6bf581dc1e55a605455fc6d61"
An 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.
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The SubAccount address may be a cryptographic value or some other identifier (ex: bonded) that uniquely specifies a SubAccount.
"0x6b175474e89094c44da98b954eedeac495271d0f"
If 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.
Blockchains 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.
Amount is some Value of a Currency. It is considered invalid to specify a Value without a Currency.
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Value 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.
"1238089899992"
Currency 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).
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Canonical symbol associated with a currency.
"BTC"
Number 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.
x >= 08
Any 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.
{ "Issuer": "Satoshi" }CoinChange 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).
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CoinIdentifier uniquely identifies a Coin.
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Identifier should be populated with a globally unique identifier of a Coin. In Bitcoin, this identifier would be transaction_hash:index.
"0x2f23fd8cca835af21f3ac375bac601f97ead75f2e79143bdf71fe2c4be043e8f:1"
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.
coin_created, coin_spent {
"asm": "304502201fd8abb11443f8b1b9a04e0495e0543d05611473a790c8939f089d073f90509a022100f4677825136605d732e2126d09a2d38c20c75946cd9fc239c0497e84c634e3dd01 03301a8259a12e35694cc22ebc45fee635f4993064190f6ce96e7fb19a03bb6be2",
"hex": "48304502201fd8abb11443f8b1b9a04e0495e0543d05611473a790c8939f089d073f90509a022100f4677825136605d732e2126d09a2d38c20c75946cd9fc239c0497e84c634e3dd012103301a8259a12e35694cc22ebc45fee635f4993064190f6ce96e7fb19a03bb6be2"
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Hex-encoded public key bytes in the format specified by the CurveType.
CurveType is the type of cryptographic curve associated with a PublicKey. * secp256k1: SEC compressed - 33 bytes (https://secg.org/sec1-v2.pdf#subsubsection.2.3.3) * secp256r1: SEC compressed - 33 bytes (https://secg.org/sec1-v2.pdf#subsubsection.2.3.3) * edwards25519: y (255-bits) || x-sign-bit (1-bit) - 32 bytes (https://ed25519.cr.yp.to/ed25519-20110926.pdf) * tweedle: 1st pk : Fq.t (32 bytes) || 2nd pk : Fq.t (32 bytes) (https://github.com/CodaProtocol/coda/blob/develop/rfcs/0038-rosetta-construction-api.md#marshal-keys)
secp256k1, secp256r1, edwards25519, tweedle Response
Expected response to a valid request
ConstructionTransactionResponse is returned by /construction/payloads. It contains an unsigned transaction blob (that is usually needed to construct the a network transaction from a collection of signatures) and an array of payloads that must be signed by the caller.
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Hex-encoded string of the payload bytes.
[DEPRECATED by account_identifier in v1.4.4] The network-specific address of the account that should sign the payload.
The 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).
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The address may be a cryptographic public key (or some encoding of it) or a provided username.
"0x3a065000ab4183c6bf581dc1e55a605455fc6d61"
An 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.
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The SubAccount address may be a cryptographic value or some other identifier (ex: bonded) that uniquely specifies a SubAccount.
"0x6b175474e89094c44da98b954eedeac495271d0f"
If 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.
Blockchains 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.
SignatureType is the type of a cryptographic signature. * ecdsa: r (32-bytes) || s (32-bytes) - 64 bytes * ecdsa_recovery: r (32-bytes) || s (32-bytes) || v (1-byte) - 65 bytes * ed25519: R (32-byte) || s (32-bytes) - 64 bytes * schnorr_1: r (32-bytes) || s (32-bytes) - 64 bytes (schnorr signature implemented by Zilliqa where both r and s are scalars encoded as 32-bytes values, most significant byte first.) * schnorr_poseidon: r (32-bytes) || s (32-bytes) where s = Hash(1st pk || 2nd pk || r) - 64 bytes (schnorr signature w/ Poseidon hash function implemented by O(1) Labs where both r and s are scalars encoded as 32-bytes values, least significant byte first. https://github.com/CodaProtocol/signer-reference/blob/master/schnorr.ml )
ecdsa, ecdsa_recovery, ed25519, schnorr_1, schnorr_poseidon Was this page helpful?