Returns result of mempool acceptance tests indicating if raw transaction (serialized, hex-encoded) would be accepted by mempool.
This checks if the transaction violates the consensus or policy rules.
See sendrawtransaction call.

Argument #1 - rawtxs

Type: json array, required
An array of hex strings of raw transactions.
Length must be one for now.
"rawtx", (string)

Argument #2 - maxfeerate

Type: numeric or string, optional, default=0.10
Reject transactions whose fee rate is higher than the specified value, expressed in BTC/kB
[ (json array) The result of the mempool acceptance test for each raw transaction in the input array.
Length is exactly one for now.
{ (json object)
"txid" : "hex", (string) The transaction hash in hex
"allowed" : true|false, (boolean) If the mempool allows this tx to be inserted
"vsize" : n, (numeric) Virtual transaction size as defined in BIP 141. This is different from actual serialized size for witness transactions as witness data is discounted (only present when 'allowed' is true)
"fees" : { (json object) Transaction fees (only present if 'allowed' is true)
"base" : n (numeric) transaction fee in BTC
"reject-reason" : "str" (string) Rejection string (only present when 'allowed' is false)
Create a transaction:
bitcoin-cli createrawtransaction "[{\"txid\" : \"mytxid\",\"vout\":0}]" "{\"myaddress\":0.01}"
Sign the transaction, and get back the hex:
bitcoin-cli signrawtransactionwithwallet "myhex"
Test acceptance of the transaction (signed hex):
bitcoin-cli testmempoolaccept '["signedhex"]'
As a JSON-RPC call:
curl --location --request POST '' \
--header 'x-api-key: your_api_key' \
--header 'Content-Type: application/json' \
--data-raw '{
"jsonrpc": "1.0",
"id": "curltest",
"method": "testmempoolaccept",
"params": [