diff --git a/api/doc/thor.yaml b/api/doc/thor.yaml
index 632a6ab5a..9ab8d0a58 100644
--- a/api/doc/thor.yaml
+++ b/api/doc/thor.yaml
@@ -746,19 +746,16 @@ components:
           type: string
           description: VET balance in wei, presented as a hexadecimal string.
           example: '0x47ff1f90327aa0f8e'
-          required: true
           nullable: false
         energy:
           type: string
           description: Energy (VTHO) in wei, presented as a hexadecimal string.
           example: '0xcf624158d591398'
-          required: true
           nullable: false
         hasCode:
           type: boolean
           description: Indicates whether the account is a contract (true) or not (false).
           example: false
-          required: true
           nullable: false
       example:
         balance: '0x47ff1f90327aa0f8e'
@@ -843,7 +840,6 @@ components:
           description: Contract bytecode, presented as a hexadecimal string.
           example: '0x6060604052600080fd00a165627a7a72305820c23d3ae2dc86ad130561a2829d87c7cb8435365492bd1548eb7e7fc0f3632be90029'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]*$'
       example:
         code: '0x6060604052600080fd00a165627a7a72305820c23d3ae2dc86ad130561a2829d87c7cb8435365492bd1548eb7e7fc0f3632be90029'
@@ -857,7 +853,6 @@ components:
           description: The value stored at the given storage position.
           example: '0x0000000000000000000000000000000000000000000000000000000000000001'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{64}$'
       example:
         value: '0x0000000000000000000000000000000000000000000000000000000000000001'
@@ -948,7 +943,6 @@ components:
             transactions:
               description: An array of transaction IDs
               type: array
-              required: true
               nullable: false
               minItems: 0
               items:
@@ -969,7 +963,6 @@ components:
                 transactions:
                   description: All included transactions, expanded, to include their receipts
                   type: array
-                  required: true
                   nullable: false
                   minItems: 0
                   items:
@@ -987,7 +980,6 @@ components:
           $ref: '#/components/schemas/FilterOptions'
         criteriaSet:
           type: array
-          required: false
           nullable: true
           minItems: 0
           items:
@@ -998,7 +990,6 @@ components:
             
             Default value: `asc`
           type: string
-          required: false
           nullable: true
           enum:
             - asc
@@ -1009,7 +1000,6 @@ components:
       title: EventLogsResponse
       minItems: 0
       nullable: false
-      required: true
       items:
         allOf:
           - $ref: '#/components/schemas/Event'
@@ -1028,7 +1018,6 @@ components:
         criteriaSet:
           type: array
           nullable: true
-          required: false
           minItems: 0
           items:
             $ref: '#/components/schemas/TransferCriteria'
@@ -1036,7 +1025,6 @@ components:
           description: |
             Specifies the order of the results. Use `asc` for ascending order, and `desc` for descending order.
           type: string
-          required: false
           nullable: true
           enum:
             - asc
@@ -1047,7 +1035,6 @@ components:
       title: TransferLogsResponse
       minItems: 0
       nullable: false
-      required: true
       items:
         allOf:
           - $ref: '#/components/schemas/Transfer'
@@ -1060,7 +1047,6 @@ components:
       title: GetPeersResponse
       minItems: 0
       nullable: false
-      required: true
       items:
         $ref: '#/components/schemas/PeerStats'
 
@@ -1076,7 +1062,6 @@ components:
               type: array
               minItems: 0
               nullable: false
-              required: true
               items:
                 type: string
                 example:
@@ -1115,7 +1100,6 @@ components:
                 The gas limit of the block
               example: 12000000
               nullable: false
-              required: true
 
     SubscriptionBeatResponse:
       type: object
@@ -1129,7 +1113,6 @@ components:
               description: |
                 The block number (height)
               example: 325324
-              required: true
               nullable: false
             id:
               type: string
@@ -1137,7 +1120,6 @@ components:
               description: |
                 The block identifier
               example: '0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215'
-              required: true
               nullable: false
               pattern: '^0x[0-9a-f]{64}$'
             parentID:
@@ -1146,7 +1128,6 @@ components:
               description: |
                 The parent block identifier
               example: '0x0004f6cb730dbd90fed09d165bfdf33cc0eed47ec068938f6ee7b7c12a4ea98d'
-              required: true
               nullable: false
               pattern: '^0x[0-9a-f]{64}$'
             timestamp:
@@ -1155,7 +1136,6 @@ components:
               description: |
                 The UNIX timestamp of the block
               example: 1533267900
-              required: true
               nullable: false
             txsFeatures:
               type: integer
@@ -1163,7 +1143,6 @@ components:
               description: |
                 The supported transaction features bitset
               example: 0
-              required: true
               nullable: false
             bloom:
               type: string
@@ -1175,7 +1154,6 @@ components:
                 providing a summary of affected addresses related to new blocks.
               example: '0x0424c1ff47029280'
               nullable: false
-              required: true
               pattern: '^0x[0-9a-f]*$'
             k:
               type: integer
@@ -1184,7 +1162,6 @@ components:
                 The number of hash functions for bloom filter
               example: 13
               nullable: false
-              required: true
 
     PostDebugTracerRequest:
       type: object
@@ -1226,7 +1203,6 @@ components:
           description: The block identifier in which the transaction was included.
           format: hex
           example: '0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]{64}$'
         blockNumber:
@@ -1234,14 +1210,12 @@ components:
           format: uint32
           description: The block number (height) of the block in which the transaction was included.
           example: 325324
-          required: true
           nullable: false
         blockTimestamp:
           type: integer
           format: uint64
           description: The UNIX timestamp of the block in which the transaction was included.
           example: 1533267900
-          required: true
           nullable: false
       example:
         blockID: '0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215'
@@ -1258,21 +1232,18 @@ components:
           description: The block identifier in which the transaction was included.
           pattern: '^0x[0-9a-f]{64}$'
           example: '0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215'
-          required: true
           nullable: false
         blockNumber:
           type: integer
           format: uint32
           description: The block number (height) of the block in which the transaction was included.
           example: 325324
-          required: true
           nullable: false
         blockTimestamp:
           type: integer
           format: uint64
           description: The UNIX timestamp of the block in which the transaction was included.
           example: 1533267900
-          required: true
           nullable: false
         txID:
           type: string
@@ -1280,14 +1251,12 @@ components:
           description: The transaction identifier.
           pattern: '^0x[0-9a-f]{64}$'
           example: '0x284bba50ef777889ff1a367ed0b38d5e5626714477c40de38d71cedd6f9fa477'
-          required: true
           nullable: false
         txOrigin:
           type: string
           description: |
             The account from which the transaction was sent.
           example: '0xdb4027477b2a8fe4c83c6dafe7f86678bb1b8a8d'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]{40}$'
       example:
@@ -1307,7 +1276,6 @@ components:
           format: hex
           description: The block identifier in which the log was included.
           example: '0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]{64}$'
         blockNumber:
@@ -1315,28 +1283,24 @@ components:
           format: uint32
           description: The block number (height) of the block in which the log was included.
           example: 325324
-          required: true
           nullable: false
         blockTimestamp:
           type: integer
           format: uint64
           description: The UNIX timestamp of the block in which the log was included.
           example: 1533267900
-          required: true
           nullable: false
         txID:
           type: string
           format: hex
           description: The transaction identifier, from which the log was generated.
           example: '0x284bba50ef777889ff1a367ed0b38d5e5626714477c40de38d71cedd6f9fa477'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]{64}$'
         txOrigin:
           type: string
           description: The account from which the transaction was sent.
           example: '0xdb4027477b2a8fe4c83c6dafe7f86678bb1b8a8d'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]{40}$'
         clauseIndex:
@@ -1344,7 +1308,6 @@ components:
           format: uint32
           description: The index of the clause in the transaction, from which the log was generated.
           example: 0
-          required: true
           nullable: false
 
     Block:
@@ -1357,14 +1320,12 @@ components:
           description: The block number (height).
           example: 325324
           nullable: false
-          required: true
         id:
           type: string
           format: hex
           description: The block identifier.
           example: '0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{64}$'
         size:
           type: integer
@@ -1372,13 +1333,11 @@ components:
           description: The RLP encoded block size in bytes
           example: 373
           nullable: false
-          required: true
         parentID:
           type: string
           format: hex
           description: The parent block identifier.
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{64}$'
           example: '0x0004f6cb730dbd90fed09d165bfdf33cc0eed47ec068938f6ee7b7c12a4ea98d'
         timestamp:
@@ -1387,21 +1346,18 @@ components:
           description: The UNIX timestamp of the block.
           example: 1533267900
           nullable: false
-          required: true
         gasLimit:
           type: integer
           format: uint64
           description: The maximum amount of gas that all transactions inside the block are allowed to consume
           example: 11253579
           nullable: false
-          required: true
         beneficiary:
           type: string
           format: hex
           description: The address assigned by the block proposer to receive the reward (in VTHO)
           example: '0xb4094c25f86d628fdd571afc4077f0d0196afb48'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
         gasUsed:
           type: integer
@@ -1409,21 +1365,18 @@ components:
           description: The actual amount of gas used within the block
           example: 21000
           nullable: false
-          required: true
         totalScore:
           type: integer
           format: uint64
           description: The accumulated witness number of the chain branch headed by the block
           example: 1029988
           nullable: false
-          required: true
         txsRoot:
           type: string
           format: hex
           description: The root hash of transactions in the block
           example: '0x89dfd9fcd10c9e53d68592cf8b540b280b72d381b868523223992f3e09a806bb'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{64}$'
         txsFeatures:
           type: integer
@@ -1431,14 +1384,12 @@ components:
           description: The supported transaction features bitset
           example: 0
           nullable: false
-          required: true
         stateRoot:
           type: string
           format: hex
           description: The root hash for the global state after applying changes in this block
           example: '0x86bcc6d214bc9d8d0dedba1012a63c8317d19ce97f60c8a2ef5c59bbd40d4261'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{64}$'
         receiptsRoot:
           type: string
@@ -1446,21 +1397,18 @@ components:
           description: The hash of the transaction receipts trie
           example: '0x15787e2533c470e8a688e6cd17a1ee12d8457778d5f82d2c109e2d6226d8e54e'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{64}$'
         com:
           type: boolean
           description: Whether the block signer voted COM(Commit) in BFT
           example: true
           nullable: false
-          required: true
         signer:
           type: string
           format: hex
           description: The address of the block signer
           example: '0xab7b27fc9e7d29f9f2e5bd361747a5515d0cc2d1'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
 
     Clause:
@@ -1473,7 +1421,6 @@ components:
             The recipient of the clause. Null indicates contract deployment.
           example: '0x0000000000000000000000000000456e65726779'
           nullable: true
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
         value:
           type: string
@@ -1481,14 +1428,12 @@ components:
             The hexadecimal representation of the amount (wei) of VET to be transferred.
           example: '0x47ff1f90327aa0f8e'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]*$'
         data:
           type: string
           description: |
             The input data for the clause (in bytes).
           example: '0xa9059cbb0000000000000000000000000f872421dc479f3c11edd89512731814d0598db5000000000000'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]*$'
 
@@ -1501,41 +1446,35 @@ components:
           description: The transaction identifier.
           example: '0x284bba50ef777889ff1a367ed0b38d5e5626714477c40de38d71cedd6f9fa477'
           pattern: '^0x[0-9a-f]{64}$'
-          required: true
           nullable: false
         origin:
           type: string
           description: The address of the origin account.
           pattern: '^0x[0-9a-f]{40}$'
           example: '0xdb4027477b2a8fe4c83c6dafe7f86678bb1b8a8d'
-          required: true
           nullable: false
         delegator:
           type: string
           pattern: '^0x[0-9a-f]{40}$'
           description: The address of the sponsor / delegator account.
           example: null
-          required: true
           nullable: true
         size:
           type: integer
           format: uint32
           description: Byte size of the transaction that is RLP encoded.
           example: 130
-          required: true
           nullable: false
         chainTag:
           type: integer
           format: uint8
           description: The last byte of the genesis block ID.
           example: 39
-          required: true
           nullable: false
         blockRef:
           type: string
           description: The first 8 bytes of a referenced block ID.
           example: '0x0004f6cb730dbd90'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]{16}$'
         expiration:
@@ -1543,7 +1482,6 @@ components:
           format: uint32
           description: The expiration of the transaction, represented as the number of blocks after the `blockRef`
           example: 720
-          required: true
           nullable: false
         clauses:
           type: array
@@ -1557,14 +1495,12 @@ components:
           format: uint8
           description: The coefficient used to calculate the final gas price of the transaction.
           example: 0
-          required: true
           nullable: false
         gas:
           type: integer
           format: uint64
           description: The max amount of gas that can be used by the transaction.
           example: 21000
-          required: true
           nullable: false
         dependsOn:
           type: string
@@ -1572,14 +1508,12 @@ components:
           description: The transaction ID that this transaction depends on.
           pattern: '^0x[0-9a-f]{64}$'
           example: null
-          required: true
           nullable: true
         nonce:
           type: string
           example: '0x29c257e36ea6e72a'
           description: |
             The transaction `nonce` is a 64-bit unsigned integer that is determined by the transaction sender.
-          required: true
           nullable: false
 
     RawTx:
@@ -1590,7 +1524,6 @@ components:
           type: string
           format: hex
           description: The raw RLP encoded transaction.
-          required: true
           nullable: false
           pattern: '^0x[0-9a-f]*$'
           example: '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'
@@ -1605,13 +1538,11 @@ components:
             The address of the contract that produces the event (bytes20).
           example: '0x0000000000000000000000000000456e65726779'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
         topics:
           type: array
           minItems: 0
           nullable: false
-          required: true
           description: |
             Topics are indexed parameters to an event. The first topic is always the event signature.
           items:
@@ -1627,7 +1558,6 @@ components:
             The data associated with the event.
           example: '0x4de71f2d588aa8a1ea00fe8312d92966da424d9939a511fc0be81e65fad52af8'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]*$'
 
     Transfer:
@@ -1640,7 +1570,6 @@ components:
             The address that sent the VET.
           example: '0x5034aa590125b64023a0262112b98d72e3c8e40e'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
         recipient:
           type: string
@@ -1648,7 +1577,6 @@ components:
             The address that received the VET.
           example: '0x6d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
         amount:
           type: string
@@ -1656,7 +1584,6 @@ components:
             The amount of VET transferred.
           example: '0x47fdb3c3f456c0000'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]*$'
 
     Receipt:
@@ -1670,28 +1597,24 @@ components:
             The amount of gas used by the transaction.
           example: 21000
           nullable: false
-          required: true
         gasPayer:
           type: string
           description: |
             The address of the account that paid the gas fee.
           example: '0xdb4027477b2a8fe4c83c6dafe7f86678bb1b8a8d'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]{40}$'
         paid:
           type: string
           description: The amount of energy (VTHO) in wei, used to pay for the gas.
           example: '0x1236efcbcbb340000'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]*$'
         reward:
           type: string
           description: The amount of energy (VTHO) in wei, paid to the block signer as a reward.
           example: '0x576e189f04f60000'
           nullable: false
-          required: true
           pattern: '^0x[0-9a-f]*$'
         reverted:
           type: boolean
@@ -1699,7 +1622,6 @@ components:
             Indicates whether the transaction was reverted (true means reverted).
           example: false
           nullable: false
-          required: true
         outputs:
           type: array
           minItems: 0
@@ -1714,20 +1636,17 @@ components:
                   contract deployment clause.
                 example: '0x0000000000000000000000000000456e65726779'
                 nullable: false
-                required: true
                 pattern: '^0x[0-9a-f]{40}$'
               events:
                 type: array
                 minItems: 0
                 nullable: false
-                required: true
                 items:
                   $ref: '#/components/schemas/Event'
               transfers:
                 type: array
                 minItems: 0
                 nullable: false
-                required: true
                 items:
                   $ref: '#/components/schemas/Transfer'
 
@@ -1741,21 +1660,18 @@ components:
             The amount of token to be transferred.
           example: '0x47ff1f90327aa0f8e'
           nullable: false
-          required: true
         data:
           type: string
           description: |
             The input data for the contract call.
           example: '0xa9059cbb0000000000000000000000000f872421dc479f3c11edd89512731814d0598db5000000000000'
           nullable: false
-          required: true
         to:
           type: string
           description: |
               The recipient of the call. Null indicates contract deployment.
           example: '0x0000000000000000000000000000456e65726779'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-f]{40}$'
         gas:
           type: integer
@@ -1764,21 +1680,18 @@ components:
             The maximum allowed gas for execution.
           example: 21000
           nullable: true
-          required: false
         gasPrice:
           type: string
           description: |
             The absolute gas price.
           example: '1000000000000000'
           nullable: true
-          required: false
         caller:
           type: string
           description: |
             The caller's address (msg.sender).
           example: '0x6d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-f]{40}$'
 
     ExtendedCallData:
@@ -1790,14 +1703,12 @@ components:
           description: |
             The transaction's proved work (for extension contract).
           example: "1000"
-          required: false
           nullable: true
         gasPayer:
           type: string
           description: |
             The address of the gas payer (for extension contract).
           example: "0xd3ae78222beadb038203be21ed5ce7c9b1bff602"
-          required: false
           nullable: true
         expiration:
           type: integer
@@ -1805,14 +1716,12 @@ components:
           description: |
             The transaction expiration (for extension contract).
           example: 1000
-          required: false
           nullable: true
         blockRef:
           type: string
           description: |
             The block reference (for extension contract).
           example: "0x00000000851caf3c"
-          required: false
           nullable: true
 
     CallResult:
@@ -1824,7 +1733,6 @@ components:
           description: |
             The output data produced by the contract execution.
           example: '0x0000000000000000000000000000000000000000000000000000000000000001'
-          required: true
           nullable: false
         events:
           type: array
@@ -1832,7 +1740,6 @@ components:
             $ref: '#/components/schemas/Event'
           description: |
             An array of events generated during contract execution.
-          required: true
           nullable: false
           minItems: 0
         transfers:
@@ -1841,7 +1748,6 @@ components:
             $ref: '#/components/schemas/Transfer'
           description: |
             An array of transfers that occurred during contract execution.
-          required: true
           nullable: false
           minItems: 0
         gasUsed:
@@ -1850,21 +1756,18 @@ components:
           description: |
             The amount of gas used during execution.
           example: 21000
-          required: true
           nullable: false
         reverted:
           type: boolean
           description: |
             Indicates whether the transaction was reverted (true means reverted).
           example: false
-          required: true
           nullable: false
         vmError:
           type: string
           description: |
             The virtual machine error message if the execution encountered an error.
           example: 'insufficient balance for transfer'
-          required: true
           nullable: false
 
     BatchCallData:
@@ -1877,7 +1780,6 @@ components:
             $ref: '#/components/schemas/Clause'
           description: |
             An array of clauses to be executed.
-          required: false
           nullable: true
         gas:
           type: integer
@@ -1885,21 +1787,18 @@ components:
           description: |
             The maximum allowed gas for the execution of the batch call.
           example: 50000
-          required: false
           nullable: true
         gasPrice:
           type: string
           description: |
             The absolute gas price for the batch call.
           example: 1000000000000000
-          required: false
           nullable: true
         caller:
           type: string
           description: |
             The caller's address (msg.sender) for the batch call.
           example: '0x6d95e6dca01d109882fe1726a2fb9865fa41e7aa'
-          required: false
           nullable: true
       example:
         clauses:
@@ -1920,7 +1819,6 @@ components:
 
     FilterOptions:
       nullable: true
-      required: false
       type: object
       title: FilterOptions
       properties:
@@ -1928,7 +1826,6 @@ components:
           type: integer
           example: 0
           nullable: true
-          required: false
           description: |
             The offset in the matched record set. Use this parameter for pagination.
             
@@ -1938,7 +1835,6 @@ components:
           type: integer
           example: 100
           nullable: true
-          required: false
           description: |
             The limit of records to be included in the output. Use this parameter for pagination.
             
@@ -1961,7 +1857,6 @@ components:
 
     FilterRange:
       nullable: true
-      required: false
       type: object
       title: FilterRange
       properties:
@@ -1972,7 +1867,6 @@ components:
             - time
           example: block
           nullable: true
-          required: false
           description: |
             Specifies the unit of measurement for the `from` and `to` values. 
             Use `block` for block numbers or `time` for block timestamps. Default is `block`.
@@ -1983,13 +1877,11 @@ components:
             Defines the starting block number or timestamp for the specified range.
           example: 17240365
           nullable: true
-          required: false
         to:
           type: integer
           format: uint64
           example: 17289864
           nullable: true
-          required: false
           description: |
             Specifies the ending block number or timestamp for the specified range.
       description: |
@@ -2017,7 +1909,6 @@ components:
           type: string
           example: '0x0000000000000000000000000000456E65726779'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{40}$'
           description: |
             The address of the contract that emits the event.
@@ -2025,7 +1916,6 @@ components:
           type: string
           example: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{64}$'
           description: |
             The keccak256 hash representing the event signature. 
@@ -2034,7 +1924,6 @@ components:
           type: string
           example: '0x0000000000000000000000006d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{64}$'
           description: |
             Filters events based on the 1st parameter in the event. 
@@ -2046,7 +1935,6 @@ components:
           type: string
           example: '0x0000000000000000000000006d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{64}$'
           description: |
             Filters events based on the 2nd parameter in the event. 
@@ -2058,7 +1946,6 @@ components:
           type: string
           example: '0x0000000000000000000000006d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{64}$'
           description: |
             Filters events based on the 3rd parameter in the event. 
@@ -2070,7 +1957,6 @@ components:
           type: string
           example: '0x0000000000000000000000006d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{64}$'
           description: |
             Filters events based on the 4th parameter in the event. 
@@ -2106,7 +1992,6 @@ components:
           type: string
           example: '0x6d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{40}$'
         sender:
           description: |
@@ -2114,7 +1999,6 @@ components:
           type: string
           example: '0x6d95e6dca01d109882fe1726a2fb9865fa41e7aa'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{40}$'
         recipient:
           description: |
@@ -2122,7 +2006,6 @@ components:
           type: string
           example: '0x45429a2255e7248e57fce99e7239aed3f84b7a53'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{40}$'
 
     PeerStats:
@@ -2134,44 +2017,37 @@ components:
           description: The identifier and version of the connected peer's software.
           example: 'thor/v1.0.0-6680b98-dev/linux/go1.10.3'
           nullable: false
-          required: true
         bestBlockID:
           type: string
           description: The identifier of the best block known to the connected peer.
           example: '0x000087b3a4d4cdf1cc52d56b9704f4c18f020e1b48dbbf4a23d1ee4f1fa5ff94'
           nullable: false
-          required: true
         totalScore:
           type: integer
           description: The total score of the connected peer.
           example: 68497
           nullable: false
-          required: true
         peerID:
           type: string
           description: The unique identifier of the connected peer on the network.
           example: '50e122a505ee55b84331068acfd857e37ad58f463a0fab9aaff2c1e4b2e2d22ae71dc14fdaf6eead74bd3f60594644aa35c588f9ca6be3341e2ce18ddc413321'
           nullable: false
-          required: true
         netAddr:
           type: string
           description: The network address (IP:Port) of the connected peer.
           example: '128.1.39.120:11235'
           nullable: false
-          required: true
           pattern: '^(?:[0-9]{1,3}\.){3}[0-9]{1,3}:[0-9]{1,5}$'
         inbound:
           type: boolean
           description: Indicates whether the connection is inbound (true) or outbound (false).
           example: false
           nullable: false
-          required: true
         duration:
           type: integer
           description: The duration of the connection with the peer.
           example: 28
           nullable: false
-          required: true
 
     TXID:
       title: TXID
@@ -2184,7 +2060,6 @@ components:
                 example:
           example: '0x4de71f2d588aa8a1ea00fe8312d92966da424d9939a511fc0be81e65fad52af8'
           pattern: '^0x[0-9a-f]{64}$'
-          required: true
           nullable: false
       example:
         id: '0x4de71f2d588aa8a1ea00fe8312d92966da424d9939a511fc0be81e65fad52af8'
@@ -2198,7 +2073,6 @@ components:
           description: |
             Indicates whether the block containing this data has become obsolete (true) or not (false).
           example: false
-          required: true
           nullable: false
       example:
         obsolete: false
@@ -2216,7 +2090,6 @@ components:
             `blockID/(txIndex|txId)/clauseIndex`
 
           example: '0x010709463c1f0c9aa66a31182fb36d1977d99bfb6526bae0564a0eac4006c31a/0/0'
-          required: true
           nullable: false
           pattern: '^0x[0-9a-fA-F]{64}\/(0x[0-9a-fA-F]{64}|\d+)\/[0-9]+$'
       example:
@@ -2242,14 +2115,12 @@ components:
           description: |
             The name of the tracer. An empty name stands for the default struct logger tracer.
           example: "prestate"
-          required: false
           nullable: true
         config:
           type: object
           description: |
             The configuration of the tracer. It is specific to the `name`
           example: {}
-          required: false
           nullable: true
       example:
         name: "prestate"
@@ -2265,7 +2136,6 @@ components:
             The address of the contract/ account to be traced.
           example: '0xd8ccdd85abdbf68dfec95f06c973e87b1b5a9997'
           nullable: false
-          required: false
           pattern: '^0x[0-9a-fA-F]{40}$'
         keyStart:
           type: string
@@ -2273,7 +2143,6 @@ components:
             The start key of the storage range. Default is `0x0000000000000000000000000000000000000000000000000000000000000000`
           example: '0x0000000000000000000000000000000000000000000000000000000000000000'
           nullable: true
-          required: false
           pattern: '^0x[0-9a-fA-F]{64}$'
         maxResult:
           type: number
@@ -2281,7 +2150,6 @@ components:
             The maximum number of results to be returned. Default is 1000.
           example: 10
           nullable: true
-          required: false
         target:
           type: string
           example: '0x010709463c1f0c9aa66a31182fb36d1977d99bfb6526bae0564a0eac4006c31a/0/0'
@@ -2290,7 +2158,6 @@ components:
             
             Format:
             `blockID/(txIndex|txId)/clauseIndex`
-          required: true
           nullable: false
           pattern: '^0x[0-9a-fA-F]{64}\/(0x[0-9a-fA-F]{64}|\d+)\/[0-9]+$'
 
@@ -2303,11 +2170,9 @@ components:
           example:
             null
           nullable: true
-          required: true
         storage:
           type: object
           nullable: false
-          required: true
           description: |
             The data is non-nullable, but an empty object is returned if no data is found.
           example:
@@ -2325,7 +2190,6 @@ components:
           type: boolean
           description: Whether the block is trunk (true) or not (false)
           example: true
-          required: true
           nullable: false
 
     IsFinalized:
@@ -2336,7 +2200,6 @@ components:
           type: boolean
           description: Whether the block has been finalized (true) or not (false)
           example: false
-          required: true
           nullable: false
 
   parameters: