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Fee Delegation

TxTypeFeeDelegatedValueTransfer

TxTypeFeeDelegatedValueTransfer is used when a user wants to send KAIA. As Kaia provides multiple transaction types to make each transaction type serve a single purpose, TxTypeFeeDelegatedValueTransfer is limited to send KAIA to an externally owned account. Therefore, TxTypeFeeDelegatedValueTransfer is accepted only if to is an externally owned account. To transfer KAIA to a smart contract account, use TxTypeFeeDelegatedSmartContractExecution instead. The following changes will be made by this transaction type.

1. The fee payer's balance decreases by the amount of the transaction fee.
2. The sender's nonce increases by one.
3. value KAIA is transferred from the sender to the recipient.

Attributes

Attribute	Type	Description
type	uint8 (Go)	The type of TxTypeFeeDelegatedValueTransfer. This must be 0x09.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A unit price of gas in kei the sender will pay for a transaction fee. The amount of transaction fee is calculated as gas * gasPrice. For example, if the transaction consumes 10 units of gas and gasPrice is 10^18, the transaction fee will be 10 KAIA. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of gas the transaction is allowed to use.
to	common.Address (Go)	The account address that will receive the transferred value.
value	*big.Int (Go)	The amount of KAIA in kei to be transferred.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from]), chainid, 0, 0])

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <the sender's private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([ encode([type, nonce, gasPrice, gas, to, value, from]), feePayer, chainid, 0, 0 ])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, txSignatures, feePayer, feePayerSignatures])`

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x1

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 0xf839b5f4098204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b018080

SigHash 0xb86e4cc0955f7c2cda1b36038c9d43a2724fc956c11e09c37625379b7eb2bd21

Signature f845f84325a09f8e49e2ad84b0732984398749956e807e4b526c786af3c5f7416b293e638956a06bf88342092f6ff9fabe31739b2ebfa1409707ce54a54693e91a6b9bb77df0e7

FeePayerPrivateKey 0xb9d5558443585bca6f225b935950e3f6e69f9da8a5809a83f51c3365dff53936

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 0xf84eb5f4098204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b945a0043070275d9f6054307ee7348bd660849d90f018080

SigHashFeePayer 0x3e7c5f40e826d1d22493be59bf62928dc397de5c972bd9bfa3fe5206c24a5f82

SignatureFeePayer f845f84326a0f45cf8d7f88c08e6b6ec0b3b562f34ca94283e4689021987abb6b0772ddfd80aa0298fe2c5aeabb6a518f4cbb5ff39631a5d88be505d3923374f65fdcf63c2955b

TxHashRLP 0x09f8d68204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0bf845f84325a09f8e49e2ad84b0732984398749956e807e4b526c786af3c5f7416b293e638956a06bf88342092f6ff9fabe31739b2ebfa1409707ce54a54693e91a6b9bb77df0e7945a0043070275d9f6054307ee7348bd660849d90ff845f84326a0f45cf8d7f88c08e6b6ec0b3b562f34ca94283e4689021987abb6b0772ddfd80aa0298fe2c5aeabb6a518f4cbb5ff39631a5d88be505d3923374f65fdcf63c2955b

TxHash e1e07f9971153499fc8c7bafcdaf7abc20b37aa4c18fb1e53a9bfcc259e3644c

SenderTxHashRLP 0x09f87a8204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0bf845f84325a09f8e49e2ad84b0732984398749956e807e4b526c786af3c5f7416b293e638956a06bf88342092f6ff9fabe31739b2ebfa1409707ce54a54693e91a6b9bb77df0e7

SenderTxHash 40f8c94e01e07eb5353f6cd4cd3eabd5893215dd53a50ba4b8ff9a447ac51731

TX(e1e07f9971153499fc8c7bafcdaf7abc20b37aa4c18fb1e53a9bfcc259e3644c)

Type: TxTypeFeeDelegatedValueTransfer

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

To: 0x7b65B75d204aBed71587c9E519a89277766EE1d0

Nonce: 1234

GasPrice: 0x19

GasLimit: 0xf4240

Value: 0xa

Signature: [{"V":"0x25","R":"0x9f8e49e2ad84b0732984398749956e807e4b526c786af3c5f7416b293e638956","S":"0x6bf88342092f6ff9fabe31739b2ebfa1409707ce54a54693e91a6b9bb77df0e7"}]

FeePayer: 0x5A0043070275d9f6054307Ee7348bD660849D90f

FeePayerSig: [{"V":"0x26","R":"0xf45cf8d7f88c08e6b6ec0b3b562f34ca94283e4689021987abb6b0772ddfd80a","S":"0x298fe2c5aeabb6a518f4cbb5ff39631a5d88be505d3923374f65fdcf63c2955b"}]

Hex: 09f8d68204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0bf845f84325a09f8e49e2ad84b0732984398749956e807e4b526c786af3c5f7416b293e638956a06bf88342092f6ff9fabe31739b2ebfa1409707ce54a54693e91a6b9bb77df0e7945a0043070275d9f6054307ee7348bd660849d90ff845f84326a0f45cf8d7f88c08e6b6ec0b3b562f34ca94283e4689021987abb6b0772ddfd80aa0298fe2c5aeabb6a518f4cbb5ff39631a5d88be505d3923374f65fdcf63c2955b

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x7ad6ed1f9955be00db8fb5452125f0e9a3c0856abb5b4cc4aed91ffc134321da",

"blockNumber": "0x1",

"contractAddress": null,

"feePayer": "0x029fdce0457db02f05c4be9f67b7115cb8ea15ca",

"feePayerSignatures": [

{

"V": "0x26",

"R": "0x984e9d43c496ef39ef2d496c8e1aee695f871e4f6cfae7f205ddda1589ca5c9e",

"S": "0x46647d1ce8755cd664f5fb4eba3082dd1a13817488029f3869662986b7b1a5ae"

}

],

"from": "0x0fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"gas": "0x174876e800",

"gasPrice": "0x5d21dba00",

"gasUsed": "0x7918",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0x2",

"senderTxHash": "0x6a8cf9a2f6d16561303445309d4f210c8be862f0d0c0e6f4998775fef9b4f957",

"signatures": [

{

"V": "0x25",

"R": "0x368b3324b37831b51711a2eba2a7608438a2bd5956ccecbcdb07d9163ff8bc87",

"S": "0x7ee2e86ad6f01c867b2ced9d69e614ba22e539726451400fccdd56acbbc7a6f7"

}

],

"status": "0x1",

"to": "0x75c3098be5e4b63fbac05838daaee378dd48098d",

"transactionHash": "0xea4341b5c95fd5a0c3a8a15a4177ab6394725c24f722a9e31f53474a6dcf086a",

"transactionIndex": "0x2",

"type": "TxTypeFeeDelegatedValueTransfer",

"typeInt": 9,

"value": "0x21e19e0c9bab2400000"

}

TxTypeFeeDelegatedValueTransferMemo

TxTypeFeeDelegatedValueTransferMemo is used when a user wants to send KAIA with a specific message. TxTypeFeeDelegatedValueTransferMemo is accepted only if to is an externally owned account. To transfer KAIA to a smart contract account, use TxTypeFeeDelegatedSmartContractExecution instead. The following changes will be made by this transaction type.

1. The fee payer's balance decreases by the amount of the transaction fee.
2. The sender's nonce increases by one.
3. value KAIA is transferred from the sender to the recipient.

Attributes

Attribute	Description	Type	An example value
type	uint8 (Go)	The type of TxTypeFeeDelegatedValueTransferMemo. This must be 0x11.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A unit price of gas in kei the sender will pay for a transaction fee. The amount of transaction fee is calculated as gas * gasPrice. For example, if the transaction consumes 10 units of gas and gasPrice is 10^18, the transaction fee will be 10 KAIA. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of gas the transaction is allowed to use.
to	common.Address (Go)	The account address that will receive the transferred value.
value	*big.Int (Go)	The amount of KAIA in kei to be transferred.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
input	[]byte (Go)	Data attached to the transaction. The message should be passed to this attribute.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from, input]), chainid, 0, 0])

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <the sender's private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from, input]), feePayer, chainid, 0, 0])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, input, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, input, txSignatures, feePayer, feePayerSignatures])

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x1

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 0xf841b83cf83a118204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b8568656c6c6f018080

SigHash 0x3333b9336d431ffa53b795fedcf03cc2217cea3f26825ea5cbf7d69f0b99fde9

Signature f845f84326a064e213aef0167fbd853f8f9989ef5d8b912a77457395ccf13d7f37009edd5c5ba05d0c2e55e4d8734fe2516ed56ac628b74c0eb02aa3b6eda51e1e25a1396093e1

FeePayerPrivateKey 0xb9d5558443585bca6f225b935950e3f6e69f9da8a5809a83f51c3365dff53936

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 0xf856b83cf83a118204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b8568656c6c6f945a0043070275d9f6054307ee7348bd660849d90f018080

SigHashFeePayer 0xed015096fb27764f576415e23576228cbf7c4fdad464ea7ffc3a1856dfe391c9

SignatureFeePayer f845f84326a087390ac14d3c34440b6ddb7b190d3ebde1a07d9a556e5a82ce7e501f24a060f9a037badbcb12cda1ed67b12b1831683a08a3adadee2ea760a07a46bdbb856fea44

TxHashRLP 0x11f8dc8204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b8568656c6c6ff845f84326a064e213aef0167fbd853f8f9989ef5d8b912a77457395ccf13d7f37009edd5c5ba05d0c2e55e4d8734fe2516ed56ac628b74c0eb02aa3b6eda51e1e25a1396093e1945a0043070275d9f6054307ee7348bd660849d90ff845f84326a087390ac14d3c34440b6ddb7b190d3ebde1a07d9a556e5a82ce7e501f24a060f9a037badbcb12cda1ed67b12b1831683a08a3adadee2ea760a07a46bdbb856fea44

TxHash 8f68882f6192a53ba470aeca1e83ed9b9e519906a91256724b284dee778b21c9

SenderTxHashRLP 0x11f8808204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b8568656c6c6ff845f84326a064e213aef0167fbd853f8f9989ef5d8b912a77457395ccf13d7f37009edd5c5ba05d0c2e55e4d8734fe2516ed56ac628b74c0eb02aa3b6eda51e1e25a1396093e1

SenderTxHash fffaa2b38d4e684ea70a89c78fc7b2659000d130c76ad721d68175cbfc77c550

TX(8f68882f6192a53ba470aeca1e83ed9b9e519906a91256724b284dee778b21c9)

Type: TxTypeFeeDelegatedValueTransferMemo

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

To: 0x7b65B75d204aBed71587c9E519a89277766EE1d0

Nonce: 1234

GasPrice: 0x19

GasLimit: 0xf4240

Value: 0xa

Signature: [{"V":"0x26","R":"0x64e213aef0167fbd853f8f9989ef5d8b912a77457395ccf13d7f37009edd5c5b","S":"0x5d0c2e55e4d8734fe2516ed56ac628b74c0eb02aa3b6eda51e1e25a1396093e1"}]

FeePayer: 0x5A0043070275d9f6054307Ee7348bD660849D90f

FeePayerSig: [{"V":"0x26","R":"0x87390ac14d3c34440b6ddb7b190d3ebde1a07d9a556e5a82ce7e501f24a060f9","S":"0x37badbcb12cda1ed67b12b1831683a08a3adadee2ea760a07a46bdbb856fea44"}]

Data: 36383635366336633666

Hex: 11f8dc8204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0b8568656c6c6ff845f84326a064e213aef0167fbd853f8f9989ef5d8b912a77457395ccf13d7f37009edd5c5ba05d0c2e55e4d8734fe2516ed56ac628b74c0eb02aa3b6eda51e1e25a1396093e1945a0043070275d9f6054307ee7348bd660849d90ff845f84326a087390ac14d3c34440b6ddb7b190d3ebde1a07d9a556e5a82ce7e501f24a060f9a037badbcb12cda1ed67b12b1831683a08a3adadee2ea760a07a46bdbb856fea44

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x7ad6ed1f9955be00db8fb5452125f0e9a3c0856abb5b4cc4aed91ffc134321da",

"blockNumber": "0x1",

"contractAddress": null,

"feePayer": "0x029fdce0457db02f05c4be9f67b7115cb8ea15ca",

"feePayerSignatures": [

{

"V": "0x25",

"R": "0xb5d80dc924c51f58eb674a142ebfd8ca1c0bc722bc85b001a5a6905ba8226b1",

"S": "0x79852418faacd4407aee4a461a08602fcf6a3a3cb63b9ba69d70ffe2f5fe3cd"

}

],

"from": "0x0fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"gas": "0x174876e800",

"gasPrice": "0x5d21dba00",

"gasUsed": "0x7b0c",

"input": "0x68656c6c6f",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0x5",

"senderTxHash": "0x5a4e42bac0b2bc8dda4ee82bfafc83e7f156f74d81d367a3db430abd40b2cd47",

"signatures": [

{

"V": "0x26",

"R": "0xe8f5484b057b542c80f16c5bb8707e040619c3dc9ac5628d2797aa3d8a2fc0d0",

"S": "0x5d598f2f10283ded6f6e6a216f4278b27fdf4d431272fa090064ac0fd3fc8102"

}

],

"status": "0x1",

"to": "0x75c3098be5e4b63fbac05838daaee378dd48098d",

"transactionHash": "0x66fe4d1abdf15a250f9391646e0242c8e4c3310250ca316d8fd00856aac16172",

"transactionIndex": "0x5",

"type": "TxTypeFeeDelegatedValueTransferMemo",

"typeInt": 17,

"value": "0x989680"

}

TxTypeFeeDelegatedSmartContractDeploy

TxTypeFeeDelegatedSmartContractDeploy deploys a smart contract with fee delegation. The following changes will be made by this transaction type.

1. The fee payer's balance decreases by the amount of the transaction fee.
2. The sender's nonce increases by one.
3. A smart contract is deployed with the code in input. The deployed address will be returned via contractAddress in the receipt.
4. value KAIA is transferred from the sender to the recipient.

Attributes

Attribute	Type	Description
type	uint8 (Go)	The type of TxTypeFeeDelegatedSmartContractDeploy. This must be 0x29.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A unit price of gas in kei the sender will pay for a transaction fee. The amount of transaction fee is calculated as gas * gasPrice. For example, if the transaction consumes 10 units of gas and gasPrice is 10^18, the transaction fee will be 10 KAIA. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of gas the transaction is allowed to use.
to	*common.Address (Go)	The account address that will receive the transferred value. Currently, this value must be nil. Specifying the address will be supported in the future.
value	*big.Int (Go)	The amount of KAIA in kei to be transferred.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
input	[]byte (Go)	Data attached to the transaction, used for transaction execution.
humanReadable	bool (Go)	This must be false since human-readable address is not supported yet. If true, the transaction will be rejected.
codeFormat	uint8 (Go)	The code format of smart contract code. The supported value for now is EVM(0x00) only.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from, input, humanReadable, codeFormat]), chainid, 0, 0])

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <the sender's private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from, input, humanReadable, codeFormat]), feePayer, chainid, 0, 0])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, input,humanReadable, codeFormat, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, input, humanReadable, codeFormat, txSignatures, feePayer, feePayerSignatures])

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x1

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 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

SigHash 0xfd5e0726c763d117d07e5e688889ab7e4d0d1164d1bbca26a9d4ee629cbd875b

Signature f845f84325a04ea37b8ecfed93795a9f99b1e4d554df6fb05a361965a7655abd4e4c4422a9e5a00b05e3fffe5a3c0892eaff31466f6c47b7edad80703d395d65bbfc1a2c6a2570

FeePayerPrivateKey 0xb9d5558443585bca6f225b935950e3f6e69f9da8a5809a83f51c3365dff53936

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 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

SigHashFeePayer 0xb7ea4d9d8c4d20ac6fd6cfffcaf89ae7d217d7450820b3b40d9ea29a0f01a1b2

SignatureFeePayer f845f84326a0c6738376304dfb32c77649bddd4ade925b947876cfe6b1fd2c06a2e4394504cca023817ba66a6b7c92fcf23f2d5506ea2a673aae5f1a1e4d742367971ae58a1576

TxHashRLP 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

TxHash a457cc54b5cfd35eb61baa5ad61398fdcecab4c83693815addf00ca7166cb87e

SenderTxHashRLP 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

SenderTxHash f3bca26fc8b50bfbcc1e94bc792ee6489cff14056e7e9aa2b074abb385f2139f

TX(a457cc54b5cfd35eb61baa5ad61398fdcecab4c83693815addf00ca7166cb87e)

Type: TxTypeFeeDelegatedSmartContractDeploy

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

To: 0x7b65B75d204aBed71587c9E519a89277766EE1d0

Nonce: 1234

GasPrice: 0x19

GasLimit: 0xf4240

Value: 0xa

Data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

HumanReadable: true

CodeFormat: CodeFormatEVM

Signature: [{"V":"0x25","R":"0x4ea37b8ecfed93795a9f99b1e4d554df6fb05a361965a7655abd4e4c4422a9e5","S":"0xb05e3fffe5a3c0892eaff31466f6c47b7edad80703d395d65bbfc1a2c6a2570"}]

FeePayer: 0x5A0043070275d9f6054307Ee7348bD660849D90f

FeePayerSig: [{"V":"0x26","R":"0xc6738376304dfb32c77649bddd4ade925b947876cfe6b1fd2c06a2e4394504cc","S":"0x23817ba66a6b7c92fcf23f2d5506ea2a673aae5f1a1e4d742367971ae58a1576"}]

Hex: 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

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x82983fe294d286e76486760e6904369285554e1744af16786c2393a956fb4ec4",

"blockNumber": "0x2",

"codeFormat": "0x0",

"contractAddress": "0x636f6e7472616374322e6b6c6179746e00000000",

"feePayer": "0x029fdce0457db02f05c4be9f67b7115cb8ea15ca",

"feePayerSignatures": [

{

"V": "0x25",

"R": "0x614fd887f4702627156132c9d56584207d1eaff529ee2967431eeaba924678f9",

"S": "0x6b883a4467ca95a0ee75567062cb6d35629e9a22faeb8a711896488ce2cc4ed9"

}

],

"from": "0x0fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"gas": "0x174876e800",

"gasPrice": "0x0",

"gasUsed": "0xee6e5b4d",

"humanReadable": true,

"input": "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",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0xb",

"senderTxHash": "0xf8f83c7a4a334430f403b20d84db492fac43ebabbd9676d731e11460d01a2160",

"signatures": [

{

"V": "0x26",

"R": "0xf3c521fea307b39bfa914b4835112bad18f89a627d639ddabe70c20af99d29a5",

"S": "0x5179048cf993049b380f8cf7017c6e83b23da7883d2728208fe6161808594f44"

}

],

"status": "0x1",

"to": "0x636f6e7472616374322e6b6c6179746e00000000",

"transactionHash": "0x39b8a31f0c02a951615e3497d68a6534b8c8cc565e514ceafec53ee7ff50b8d9",

"transactionIndex": "0x4",

"type": "TxTypeFeeDelegatedSmartContractDeploy",

"typeInt": 41,

"value": "0x0"

}

TxTypeFeeDelegatedSmartContractExecution

TxTypeFeeDelegatedSmartContractExecution executes a smart contract with the given data in input. Fee will be paid by the given fee payer. TxTypeFeeDelegatedSmartContractExecution is accepted only if to is a smart contract account. To transfer KAIA to an externally owned account, use TxTypeFeeDelegatedValueTransfer instead. The following changes will be made by this transaction type.

1. If to is a smart contract account, the code is executed based on input. Otherwise, this transaction will be rejected.
2. The fee payer's balance decreases by the amount of the transaction fee.
3. The sender's nonce increases by one.
4. If value was provided, value KAIA is transferred from the sender to the to smart contract. The contract should have a payable fallback function to receive KAIA.

Attributes

Attribute	Type	Description
type	uint8 (Go)	The type of TxTypeFeeDelegatedSmartContractExecution. This must be 0x31.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A unit price of gas in kei the sender will pay for a transaction fee. The amount of transaction fee is calculated as gas * gasPrice. For example, if the transaction consumes 10 units of gas and gasPrice is 10^18, the transaction fee will be 10 KAIA. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of gas the transaction is allowed to use.
to	common.Address (Go)	The address of the smart contract account to be executed.
value	*big.Int (Go)	The amount of KAIA in kei to be transferred.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
input	[]byte (Go)	Data attached to the transaction, used for transaction execution.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from, input]), chainid, 0, 0])

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <the sender's private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([encode([type, nonce, gasPrice, gas, to, value, from, input]), feePayer, chainid, 0, 0])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, input, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, to, value, from, input, txSignatures, feePayer, feePayerSignatures])

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x1

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 0xf860b85bf859318204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0ba46353586b000000000000000000000000bc5951f055a85f41a3b62fd6f68ab7de76d299b2018080

SigHash 0xa5dd93af9f96fa316f0ddd84f10acb2e6eb41baaec3b42f9068c38aa1618f7e1

Signature f845f84325a0253aea7d2c37160da45e84afbb45f6b3341cf1e8fc2df4ecc78f14adb512dc4fa022465b74015c2a8f8501186bb5e200e6ce44be52e9374615a7e7e21c41bc27b5

FeePayerPrivateKey 0xb9d5558443585bca6f225b935950e3f6e69f9da8a5809a83f51c3365dff53936

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 0xf875b85bf859318204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0ba46353586b000000000000000000000000bc5951f055a85f41a3b62fd6f68ab7de76d299b2945a0043070275d9f6054307ee7348bd660849d90f018080

SigHashFeePayer 0xf547d9d0041912e0daa2db2b65170a9e833877cd8482f405a11b03429fcbd554

SignatureFeePayer f845f84326a0e7c51db7b922c6fa2a941c9687884c593b1b13076bdf0c473538d826bf7b9d1aa05b0de2aabb84b66db8bf52d62f3d3b71b592e3748455630f1504c20073624d80

TxHashRLP 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

TxHash ef46f28c54b3d90a183e26f406ca1d5cc2b6e9fbb6cfa7c85a10330ffadf54b0

SenderTxHashRLP 0x31f89f8204d219830f4240947b65b75d204abed71587c9e519a89277766ee1d00a94a94f5374fce5edbc8e2a8697c15331677e6ebf0ba46353586b000000000000000000000000bc5951f055a85f41a3b62fd6f68ab7de76d299b2f845f84325a0253aea7d2c37160da45e84afbb45f6b3341cf1e8fc2df4ecc78f14adb512dc4fa022465b74015c2a8f8501186bb5e200e6ce44be52e9374615a7e7e21c41bc27b5

SenderTxHash 3cd3380f4206943422d5d5b218dd66d03d60d19a109f9929ea12b52a230257cb

TX(ef46f28c54b3d90a183e26f406ca1d5cc2b6e9fbb6cfa7c85a10330ffadf54b0)

Type: TxTypeFeeDelegatedSmartContractExecution

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

To: 0x7b65B75d204aBed71587c9E519a89277766EE1d0

Nonce: 1234

GasPrice: 0x19

GasLimit: 0xf4240

Value: 0xa

Data: 363335333538366230303030303030303030303030303030303030303030303062633539353166303535613835663431613362363266643666363861623764653736643239396232

Signature: [{"V":"0x25","R":"0x253aea7d2c37160da45e84afbb45f6b3341cf1e8fc2df4ecc78f14adb512dc4f","S":"0x22465b74015c2a8f8501186bb5e200e6ce44be52e9374615a7e7e21c41bc27b5"}]

FeePayer: 0x5A0043070275d9f6054307Ee7348bD660849D90f

FeePayerSig: [{"V":"0x26","R":"0xe7c51db7b922c6fa2a941c9687884c593b1b13076bdf0c473538d826bf7b9d1a","S":"0x5b0de2aabb84b66db8bf52d62f3d3b71b592e3748455630f1504c20073624d80"}]

Hex: 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

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x82983fe294d286e76486760e6904369285554e1744af16786c2393a956fb4ec4",

"blockNumber": "0x2",

"contractAddress": null,

"feePayer": "0x029fdce0457db02f05c4be9f67b7115cb8ea15ca",

"feePayerSignatures": [

{

"V": "0x25",

"R": "0x1c7de2c83542b623ba47722f310c0e5893486eef4eed70b634d456262fb430a7",

"S": "0x177929c52669c4b9433565a76e53723b702bae8142debe1981062f59f25062ab"

}

],

"from": "0x0fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"gas": "0x174876e800",

"gasPrice": "0x0",

"gasUsed": "0xb0bc",

"input": "0x6353586b0000000000000000000000000fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0xe",

"senderTxHash": "0xffd354e4e271ff94a7459c2f1bc0df20dc112a83f5625ff7e31d196444f72710",

"signatures": [

{

"V": "0x25",

"R": "0xefc6fec3dae47a08941712f637c95dbc46ef2afd3d16e68da602a878c0bba047",

"S": "0x938a5374edcea0503df8e7af906a7642f7e935eab7c489b7ca8b976a8e5ab7e"

}

],

"status": "0x1",

"to": "0x636f6e74726163742e6b6c6179746e0000000000",

"transactionHash": "0x658a118112ffb0c06adecd59b0f11b58cf7d8afd7ec5e5d323cfca021c3dcb37",

"transactionIndex": "0x7",

"type": "TxTypeFeeDelegatedSmartContractExecution",

"typeInt": 49,

"value": "0xa"

}

TxTypeFeeDelegatedAccountUpdate

TxTypeFeeDelegatedAccountUpdate updates the key of the given account. The transaction fee is paid by the fee payer. The following changes will take place by this transaction type.

1. The fee payer's balance decreases by the amount of the transaction fee.
2. The sender's nonce increases by one.
3. The account's key is updated with key.
4. Once this type of transaction is executed, transactions sent from the account afterward will be validated with the new key.
5. The transaction fee is paid by the fee payer.

Attributes

Attribute	Type	Description
type	uint8 (Go)	The type of TxTypeAccountUpdate. This must be 0x21.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A multiplier to get how much the sender will pay in tokens. The amount of tokens the sender will pay is calculated via gas * gasPrice. For example, the sender will pay 10 KAIA for a transaction fee if gas is 10 and gasPrice is 10^18. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of transaction fee the transaction is allowed to use.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
key	AccountKey (Go)	AccountKey to be updated to the account.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, from, rlpEncodedKey]), chainid, 0, 0])`

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <the sender's private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([encode([type, nonce, gasPrice, gas, from, rlpEncodedKey]), feePayer, chainid, 0, 0])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, from, rlpEncodedKey, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, from, rlpEncodedKey, txSignatures, feePayer, feePayerSignatures])

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x1

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 0xf849b844f842218204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0ba302a1033a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d018080

SigHash 0x78437953e6beb985ea3ccbee8d6a648a09d11249389477a32c7094fc7b8765ef

Signature f845f84326a0ab69d9adca15d9763c4ce6f98b35256717c6e932007658f19c5a255de9e70ddaa026aa676a3a1a6e96aff4a3df2335788d614d54fb4db1c3c48551ce1fa7ac5e52

FeePayerPrivateKey 0xb9d5558443585bca6f225b935950e3f6e69f9da8a5809a83f51c3365dff53936

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 0xf85eb844f842218204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0ba302a1033a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d945a0043070275d9f6054307ee7348bd660849d90f018080

SigHashFeePayer 0x1026d3ac74f56b52453d656b084d06798479b8bcfda1868d8beaa23e36f3aeb3

SignatureFeePayer f845f84326a0f295cd69b4144d9dbc906ba144933d2cc535d9d559f7a92b4672cc5485bf3a60a0784b8060234ffd64739b5fc2f2503939340ab4248feaa6efcf62cb874345fe40

TxHashRLP 0x21f8e48204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0ba302a1033a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33df845f84326a0ab69d9adca15d9763c4ce6f98b35256717c6e932007658f19c5a255de9e70ddaa026aa676a3a1a6e96aff4a3df2335788d614d54fb4db1c3c48551ce1fa7ac5e52945a0043070275d9f6054307ee7348bd660849d90ff845f84326a0f295cd69b4144d9dbc906ba144933d2cc535d9d559f7a92b4672cc5485bf3a60a0784b8060234ffd64739b5fc2f2503939340ab4248feaa6efcf62cb874345fe40

TxHash 756ff5d3912a4089659614d42a218eee59e602a5992bddca383c2d295c6637bb

SenderTxHashRLP 0x21f8888204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0ba302a1033a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33df845f84326a0ab69d9adca15d9763c4ce6f98b35256717c6e932007658f19c5a255de9e70ddaa026aa676a3a1a6e96aff4a3df2335788d614d54fb4db1c3c48551ce1fa7ac5e52

SenderTxHash f56937017bd3b75c637ba5b4ce90df20c166006a2a529b42e808bc806159b98f

TX(756ff5d3912a4089659614d42a218eee59e602a5992bddca383c2d295c6637bb)

Type: TxTypeFeeDelegatedAccountUpdate

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

Nonce: 1234

GasPrice: 0x19

GasLimit: 0xf4240

Key: AccountKeyPublic: S256Pubkey:{"x":"0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d","y":"0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3"}

Signature: [{"V":"0x26","R":"0xab69d9adca15d9763c4ce6f98b35256717c6e932007658f19c5a255de9e70dda","S":"0x26aa676a3a1a6e96aff4a3df2335788d614d54fb4db1c3c48551ce1fa7ac5e52"}]

FeePayer: 0x5A0043070275d9f6054307Ee7348bD660849D90f

FeePayerSig: [{"V":"0x26","R":"0xf295cd69b4144d9dbc906ba144933d2cc535d9d559f7a92b4672cc5485bf3a60","S":"0x784b8060234ffd64739b5fc2f2503939340ab4248feaa6efcf62cb874345fe40"}]

Hex: 21f8e48204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0ba302a1033a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33df845f84326a0ab69d9adca15d9763c4ce6f98b35256717c6e932007658f19c5a255de9e70ddaa026aa676a3a1a6e96aff4a3df2335788d614d54fb4db1c3c48551ce1fa7ac5e52945a0043070275d9f6054307ee7348bd660849d90ff845f84326a0f295cd69b4144d9dbc906ba144933d2cc535d9d559f7a92b4672cc5485bf3a60a0784b8060234ffd64739b5fc2f2503939340ab4248feaa6efcf62cb874345fe40

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x82983fe294d286e76486760e6904369285554e1744af16786c2393a956fb4ec4",

"blockNumber": "0x2",

"contractAddress": null,

"feePayer": "0x0fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"feePayerSignatures": [

{

"V": "0x25",

"R": "0x3b019642e5ae37f3ecbf85e6fc1ee77e51d1618299367bcedd816d0da6afb1e0",

"S": "0x5c12c87811a74183f8b56b707fa90a916b1c641652c93e52300f5cee36141d73"

}

],

"from": "0x636f6c696e322e6b6c6179746e00000000000000",

"gas": "0x174876e800",

"gasPrice": "0x5d21dba00",

"gasUsed": "0xc738",

"key": "0x02a1034ef27ba4b7d1ae09b166744c5b7ee4a7a0cc5c76b2e5d74523a0a4fb56db3191",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0x0",

"senderTxHash": "0xf4e7ef082451d4a3c8ad7c4348fc99c965a9c130bfc98d7971f3103e3dcfda3c",

"signatures": [

{

"V": "0x26",

"R": "0xd4cb16abcdf92969dc45efacaa5827ad55738fbda08a3dbaf0f0553643084a6",

"S": "0x23f8055933b416cf15568a017e0a11e0a5c0a8f65477f6ec71de0bf837f4a681"

}

],

"status": "0x1",

"transactionHash": "0xeb0c14d903db38deee116ac8a0d620e6ca6aa79e4f91393abbddfa30810b9d43",

"transactionIndex": "0x2",

"type": "TxTypeFeeDelegatedAccountUpdate",

"typeInt": 33

},

TxTypeFeeDelegatedCancel

TxTypeFeeDelegatedCancel cancels the execution of the transaction with the same nonce in the transaction pool. For more details, see TxTypeCancel.

The following changes will apply by this transaction type. 1. The fee payer's balance decreases by the amount of the transaction fee. 2. The sender's nonce increases by one.

Attributes

Attribute	Type	Description
type	uint8 (Go)	The type of TxTypeCancel. This must be 0x39.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A unit price of gas in kei the sender will pay for a transaction fee. The amount of transaction fee is calculated as gas * gasPrice. For example, if the transaction consumes 10 units of gas and gasPrice is 10^18, the transaction fee will be 10 KAIA. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of transaction fee the transaction is allowed to use.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, from]), chainid, 0, 0])

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <the sender's private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([encode([type, nonce, gasPrice, gas, from]), feePayer, chainid, 0, 0])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, from, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, from, txSignatures, feePayer, feePayerSignatures])

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x1

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 0xe39fde398204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0b018080

SigHash 0xd36c4277f4aa1d483a5fc4d656aeea50416c28adddb27a234d320290bd2a343c

Signature f845f84326a08409f5441d4725f90905ad87f03793857d124de7a43169bc67320cd2f020efa9a060af63e87bdc565d7f7de906916b2334336ee7b24d9a71c9521a67df02e7ec92

FeePayerPrivateKey 0xb9d5558443585bca6f225b935950e3f6e69f9da8a5809a83f51c3365dff53936

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 0xf8389fde398204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0b945a0043070275d9f6054307ee7348bd660849d90f018080

SigHashFeePayer 0x15859ecc06acbd2dd5820c5968a85590826d1f6affb938e89559558ac4f86a24

SignatureFeePayer f845f84326a0044d5b25e8c649a1fdaa409dc3817be390ad90a17c25bc17c89b6d5d248495e0a073938e690d27b5267c73108352cf12d01de7fd0077b388e94721aa1fa32f85ec

TxHashRLP 0x39f8c08204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0bf845f84326a08409f5441d4725f90905ad87f03793857d124de7a43169bc67320cd2f020efa9a060af63e87bdc565d7f7de906916b2334336ee7b24d9a71c9521a67df02e7ec92945a0043070275d9f6054307ee7348bd660849d90ff845f84326a0044d5b25e8c649a1fdaa409dc3817be390ad90a17c25bc17c89b6d5d248495e0a073938e690d27b5267c73108352cf12d01de7fd0077b388e94721aa1fa32f85ec

TxHash 96b39d3ab849127d31a5f7b5c882ca9ba408cd9d875052640d51a64f8c4acbb2

SenderTxHashRLP 0x39f8648204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0bf845f84326a08409f5441d4725f90905ad87f03793857d124de7a43169bc67320cd2f020efa9a060af63e87bdc565d7f7de906916b2334336ee7b24d9a71c9521a67df02e7ec92

SenderTxHash cc6c2673398903b3d906a3023b41636fc08bd1bddd5aa1602116091638f48447

TX(96b39d3ab849127d31a5f7b5c882ca9ba408cd9d875052640d51a64f8c4acbb2)

Type: TxTypeFeeDelegatedCancel

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

Nonce: 1234

GasPrice: 0x19

GasLimit: 0xf4240

Signature: [{"V":"0x26","R":"0x8409f5441d4725f90905ad87f03793857d124de7a43169bc67320cd2f020efa9","S":"0x60af63e87bdc565d7f7de906916b2334336ee7b24d9a71c9521a67df02e7ec92"}]

FeePayer: 0x5A0043070275d9f6054307Ee7348bD660849D90f

FeePayerSig: [{"V":"0x26","R":"0x44d5b25e8c649a1fdaa409dc3817be390ad90a17c25bc17c89b6d5d248495e0","S":"0x73938e690d27b5267c73108352cf12d01de7fd0077b388e94721aa1fa32f85ec"}]

Hex: 39f8c08204d219830f424094a94f5374fce5edbc8e2a8697c15331677e6ebf0bf845f84326a08409f5441d4725f90905ad87f03793857d124de7a43169bc67320cd2f020efa9a060af63e87bdc565d7f7de906916b2334336ee7b24d9a71c9521a67df02e7ec92945a0043070275d9f6054307ee7348bd660849d90ff845f84326a0044d5b25e8c649a1fdaa409dc3817be390ad90a17c25bc17c89b6d5d248495e0a073938e690d27b5267c73108352cf12d01de7fd0077b388e94721aa1fa32f85ec

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x82983fe294d286e76486760e6904369285554e1744af16786c2393a956fb4ec4",

"blockNumber": "0x2",

"contractAddress": null,

"feePayer": "0x029fdce0457db02f05c4be9f67b7115cb8ea15ca",

"feePayerSignatures": [

{

"V": "0x25",

"R": "0x26a7c88e1fc77400f2a4c7911966a5e51b0873e3f26daf9d6519b93e3f3db6a3",

"S": "0x560e5fa8d53ebf899eb48353bf14794c76784240a6a212f5ddbe7f1684088f3f"

}

],

"from": "0x0fcda0f2efbe1b4e61b487701ce4f2f8abc3723d",

"gas": "0x174876e800",

"gasPrice": "0x5d21dba00",

"gasUsed": "0x7918",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0x11",

"senderTxHash": "0x2fea0ff37b8b936d4c06f29b98c4bd200827423fb445f931eb64725aefcda053",

"signatures": [

{

"V": "0x26",

"R": "0xcfdb5b3ff6c87a8f18ae606b371d1e569c56d35a737831b89052c5a8ef19d049",

"S": "0x1ee63bd5a01c45d0c6f1b36a29e1c01b56baa719f008c556bc9054ac5a64bd8d"

}

],

"status": "0x1",

"transactionHash": "0xf475e714b30aef0b79d46c9482289f3fbe51f1e44bcbc99a90ac8e25672bc969",

"transactionIndex": "0xa",

"type": "TxTypeFeeDelegatedCancel",

"typeInt": 57

}

TxTypeFeeDelegatedChainDataAnchoring

TxTypeFeeDelegatedChainDataAnchoring is a fee-delegated transaction that anchors service chain data to the Kaia mainchain. Service chains periodically send this type of transaction to the Kaia mainchain to ensure its security and credibility of data. For more details about the data anchoring, see Anchoring. As it is a fee-delegated transaction as well, its transaction fee is charged to the fee payer. Be mindful that it is not allowed to send this transaction via RPC. Currently, this transaction is executed through private p2p channels for security reasons. This transaction does not change the state of the Kaia blockchain except the sender's nonce being increased by one.

Attributes

Attribute	Type	Description
type	uint8 (Go)	The type of TxTypeFeeDelegatedChainDataAnchoring. This must be 0x49.
nonce	uint64 (Go)	A value used to uniquely identify a sender’s transaction. If two transactions with the same nonce are generated by a sender, only one is executed.
gasPrice	*big.Int (Go)	A unit price of gas in kei the sender will pay for a transaction fee. The amount of transaction fee is calculated as gas * gasPrice. For example, if the transaction consumes 10 units of gas and gasPrice is 10^18, the transaction fee will be 10 KAIA. See Unit of KAIA.
gas	uint64 (Go)	The maximum amount of transaction fee the transaction is allowed to use.
from	common.Address (Go)	The address of the sender. For more details, see Signature Validation of Transactions.
input	[]byte (Go)	Data of the service chain.
txSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The sender's signatures. For more details, see Signature Validation of Transactions.
feePayer	common.Address (Go)	The address of the fee payer.
feePayerSignatures	[]{*big.Int, *big.Int, *big.Int} (Go)	The fee payer's signatures.

RLP Encoding for Signature of the Sender

To make a signature of the sender, RLP serialization should be done like the following:

SigRLP = encode([encode([type, nonce, gasPrice, gas, from, anchoredData]), chainid, 0, 0])

SigHash = keccak256(SigRLP)

Signature = sign(SigHash, <private key>)

RLP Encoding for Signature of the Fee Payer

To make a signature of the fee payer, RLP serialization should be done like the following:

SigFeePayerRLP = encode([encode([type, nonce, gasPrice, gas, from, anchoredData]), feePayer, chainid, 0, 0])

SigFeePayerHash = keccak256(SigFeePayerRLP)

SignatureFeePayer = sign(SigFeePayerHash, <the fee payer's private key>)

RLP Encoding for SenderTxHash

To make a SenderTxHash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

SenderTxHashRLP = type + encode([nonce, gasPrice, gas, from, anchoredData, txSignatures])

SenderTxHash = keccak256(SenderTxHashRLP)

RLP Encoding for Transaction Hash

To make a transaction hash, RLP serialization should be done like the following:

txSignatures (a single signature) = [[v, r, s]]

txSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

feePayerSignatures (a single signature) = [[v, r, s]]

feePayerSignatures (two signatures) = [[v1, r1, s1], [v2, r2, s2]]

TxHashRLP = type + encode([nonce, gasPrice, gas, from, anchoredData, txSignatures, feePayer, feePayerSignatures])

TxHash = keccak256(TxHashRLP)

RLP Encoding (Example)

The following shows the result of RLP serialization and the transaction object:

ChainID 0x01

PrivateKey 0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8

PublicKey.X 0x3a514176466fa815ed481ffad09110a2d344f6c9b78c1d14afc351c3a51be33d

PublicKey.Y 0x8072e77939dc03ba44790779b7a1025baf3003f6732430e20cd9b76d953391b3

SigRLP 0xf8dbb8d6f8d449118505d21dba0085174876e80094a94f5374fce5edbc8e2a8697c15331677e6ebf0bb8aff8ad80b8aaf8a8a00000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000002a00000000000000000000000000000000000000000000000000000000000000003a00000000000000000000000000000000000000000000000000000000000000004058006018080

SigHash 0x92e385b4a162170ee87b2b2e598f686b1d16f385d98ad626147305624abec0b3

Signature 0xf845f84326a0afe41edc9cce1185ab9065ca7dbfb89ab5c7bde3602a659aa258324124644142a0317848698248ba7cc057b8f0dd19a27b52ef904d29cb72823100f1ed18ba2bb3

FeePayerPublicKey.X 0x327434d4cfc66ef8857d431419e9deebdc53a3e415edcc55382e2d417b8dd102

FeePayerPublicKey.Y 0x65fc97045707faf7b8f81ac65089d4cc71f69ad0bf1bc8559bc24f13fc284ced

SigRLPFeePayer 0xf8f0b8d6f8d449118505d21dba0085174876e80094a94f5374fce5edbc8e2a8697c15331677e6ebf0bb8aff8ad80b8aaf8a8a00000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000002a00000000000000000000000000000000000000000000000000000000000000003a000000000000000000000000000000000000000000000000000000000000000040580069433f524631e573329a550296f595c820d6c65213f018080

SigHashFeePayer 0x4d58fdf276fde1e221b6bab8c6621ae1639b00a7a70d2bd0a114001692a3a7d1

SignatureFeePayer 0xf845f84325a0309e46db21a1bf7bfdae24d9192aca69516d6a341ecce8971fc69cff481cee76a04b939bf7384c4f919880307323a5e36d4d6e029bae1887a43332710cdd48f174

TxHashRLP 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

TxHash 0xecf1ec12937065617f9b3cd07570452bfdb75dc36404c4f37f78995c6dc462af

SenderTxHashRLP 0x49f9011a118505d21dba0085174876e80094a94f5374fce5edbc8e2a8697c15331677e6ebf0bb8aff8ad80b8aaf8a8a00000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000002a00000000000000000000000000000000000000000000000000000000000000003a00000000000000000000000000000000000000000000000000000000000000004058006f845f84326a0afe41edc9cce1185ab9065ca7dbfb89ab5c7bde3602a659aa258324124644142a0317848698248ba7cc057b8f0dd19a27b52ef904d29cb72823100f1ed18ba2bb3

SenderTxHash 0x4f5c00ea8f6346baa7d4400dfefd72efa5ec219561ebcebed7be8a2b79d52bcd

TX(ecf1ec12937065617f9b3cd07570452bfdb75dc36404c4f37f78995c6dc462af)

Type: TxTypeFeeDelegatedChainDataAnchoring

From: 0xa94f5374Fce5edBC8E2a8697C15331677e6EbF0B

Nonce: 17

GasPrice: 0x5d21dba00

GasLimit: 0x174876e800

AnchoredData: f8ad80b8aaf8a8a00000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000002a00000000000000000000000000000000000000000000000000000000000000003a00000000000000000000000000000000000000000000000000000000000000004058006

Signature: [{"V":"0x26","R":"0xafe41edc9cce1185ab9065ca7dbfb89ab5c7bde3602a659aa258324124644142","S":"0x317848698248ba7cc057b8f0dd19a27b52ef904d29cb72823100f1ed18ba2bb3"}]

FeePayer: 0x33f524631e573329a550296F595c820D6c65213f

FeePayerSig: [{"V":"0x25","R":"0x309e46db21a1bf7bfdae24d9192aca69516d6a341ecce8971fc69cff481cee76","S":"0x4b939bf7384c4f919880307323a5e36d4d6e029bae1887a43332710cdd48f174"}]

Hex: 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

RPC Output (Example)

The following shows a transaction object returned via JSON RPC.

{

"blockHash": "0x170a32e16b6fdced144d5104f5aecf753878bd9f1a7d87ddccc2e6d2ba27354c",

"blockNumber": "0x2",

"contractAddress": null,

"feePayer": "0x33f524631e573329a550296f595c820d6c65213f",

"feePayerSignatures": [

{

"V": "0x25",

"R": "0x309e46db21a1bf7bfdae24d9192aca69516d6a341ecce8971fc69cff481cee76",

"S": "0x4b939bf7384c4f919880307323a5e36d4d6e029bae1887a43332710cdd48f174"

}

],

"from": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b",

"gas": "0x174876e800",

"gasPrice": "0x5d21dba00",

"gasUsed": "0xbd74",

"input": "0xf8ad80b8aaf8a8a00000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000002a00000000000000000000000000000000000000000000000000000000000000003a00000000000000000000000000000000000000000000000000000000000000004058006",

"logs": [],

"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

"nonce": "0x11",

"senderTxHash": "0x4f5c00ea8f6346baa7d4400dfefd72efa5ec219561ebcebed7be8a2b79d52bcd",

"signatures": [

{

"V": "0x26",

"R": "0xafe41edc9cce1185ab9065ca7dbfb89ab5c7bde3602a659aa258324124644142",

"S": "0x317848698248ba7cc057b8f0dd19a27b52ef904d29cb72823100f1ed18ba2bb3"

}

],

"status": "0x1",

"transactionHash": "0xecf1ec12937065617f9b3cd07570452bfdb75dc36404c4f37f78995c6dc462af",

"transactionIndex": "0xa",

"type": "TxTypeFeeDelegatedChainDataAnchoring",

"typeInt": 73

}