Meta Sign

Create a meta-transaction signature payload for one or more messages.

Request URL

https://testnet.api.euclidprotocol.com/api/v1/execute/meta-txn/sign

Examples

curl -X 'POST'   'https://testnet.api.euclidprotocol.com/api/v1/execute/meta-txn/sign'   -H 'accept: application/json'   -H 'Content-Type: application/json'   -d '{
  "msgs": [
    {
      "msg": {
        "call_data": "{\"transfer\":{\"amount\":\"1000000\",\"from\":{\"chain_uid\":\"neuron\",\"address\":\"0x887e4aac216674d2c432798f851c1ea5d505b2e1\",\"amount\":\"1000000\"},\"msg\":\"\",\"recipient_address\":{\"user\":{\"chain_uid\":\"0g\",\"address\":\"0x5abfe1234567890cdefabc1234567890defabc01\",\"amount\":\"1000000\"},\"limit\":{\"less_than_or_equal\":\"1000000\"},\"preferred_denom\":{\"voucher\":{}},\"forwarding_message\":{\"data\":\"0x\"}},\"sender\":{\"chain_uid\":\"neuron\",\"address\":\"0x887e4aac216674d2c432798f851c1ea5d505b2e1\",\"amount\":\"1000000\"},\"timeout\":\"60\",\"token\":\"euclid\",\"tx_id\":\"\"}}",
        "target": "euclid1ywzqwvhmm58e02lvr579xlcn873kptl40a4teqnjd8t8kndfps7qdghdaq"
      },
      "type": "transfer_voucher"
    }
  ],
  "sender_address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
  "sender_chain_uid": "neuron"
}'

{
  "meta": [
    {
      "type": "transfer_voucher",
      "token_in": "",
      "token_out": "",
      "token": "",
      "amount_in": "",
      "amount_out": ""
    }
  ],
  "payload": {
    "signer_address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
    "signer_prefix": "0x",
    "signer_chain_uid": "neuron",
    "call_data": [
      {
        "target": "euclid1ywzqwvhmm58e02lvr579xlcn873kptl40a4teqnjd8t8kndfps7qdghdaq",
        "call_data": {
          "transfer": {
            "amount": "1000000",
            "from": {
              "chain_uid": "neuron",
              "address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
              "amount": "1000000"
            },
            "msg": "",
            "recipient_address": {
              "user": {
                "chain_uid": "0g",
                "address": "0x5abfe1234567890cdefabc1234567890defabc01",
                "amount": "1000000"
              },
              "limit": {
                "less_than_or_equal": "1000000"
              },
              "preferred_denom": {
                "voucher": {}
              },
              "forwarding_message": {
                "data": "0x"
              }
            },
            "sender": {
              "chain_uid": "neuron",
              "address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
              "amount": "1000000"
            },
            "timeout": "60",
            "token": "euclid",
            "tx_id": ""
          }
        }
      }
    ],
    "expiry": 1768847504,
    "nonce": "1768847444"
  },
  "types": [
    "transfer_voucher"
  ]
}

curl -X 'POST'   'https://testnet.api.euclidprotocol.com/api/v1/execute/meta-txn/sign'   -H 'accept: application/json'   -H 'Content-Type: application/json'   -d '{
  "msgs": [
    {
      "msg": {
        "call_data": "{\"transfer\":{\"amount\":\"1000000\",\"from\":{\"chain_uid\":\"bsc\",\"address\":\"0x887e4aac216674d2c432798f851c1ea5d505b2e1\",\"amount\":\"1000000\"},\"msg\":\"\",\"recipient_address\":{\"user\":{\"chain_uid\":\"0g\",\"address\":\"0x5abfe1234567890cdefabc1234567890defabc01\",\"amount\":\"1000000\"},\"limit\":{\"less_than_or_equal\":\"1000000\"},\"preferred_denom\":{\"voucher\":{}},\"forwarding_message\":{\"data\":\"0x\"}},\"sender\":{\"chain_uid\":\"bsc\",\"address\":\"0x887e4aac216674d2c432798f851c1ea5d505b2e1\",\"amount\":\"1000000\"},\"timeout\":\"60\",\"token\":\"euclid\",\"tx_id\":\"\"}}",
        "target": "euclid1ywzqwvhmm58e02lvr579xlcn873kptl40a4teqnjd8t8kndfps7qdghdaq"
      },
      "type": "transfer_voucher"
    }
  ],
  "sender_address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
  "sender_chain_uid": "bsc"
}'

{
  "meta": [
    {
      "type": "transfer_voucher",
      "token_in": "",
      "token_out": "",
      "token": "",
      "amount_in": "",
      "amount_out": ""
    }
  ],
  "payload": {
    "signer_address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
    "signer_prefix": "0x",
    "signer_chain_uid": "bsc",
    "call_data": [
      {
        "target": "euclid1ywzqwvhmm58e02lvr579xlcn873kptl40a4teqnjd8t8kndfps7qdghdaq",
        "call_data": {
          "transfer": {
            "amount": "1000000",
            "from": {
              "chain_uid": "bsc",
              "address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
              "amount": "1000000"
            },
            "msg": "",
            "recipient_address": {
              "user": {
                "chain_uid": "0g",
                "address": "0x5abfe1234567890cdefabc1234567890defabc01",
                "amount": "1000000"
              },
              "limit": {
                "less_than_or_equal": "1000000"
              },
              "preferred_denom": {
                "voucher": {}
              },
              "forwarding_message": {
                "data": "0x"
              }
            },
            "sender": {
              "chain_uid": "bsc",
              "address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
              "amount": "1000000"
            },
            "timeout": "60",
            "token": "euclid",
            "tx_id": ""
          }
        }
      }
    ],
    "expiry": 1768847836,
    "nonce": "1768847776"
  },
  "types": [
    "transfer_voucher"
  ]
}

Decoded call_data (transfer example)

{
  "transfer": {
    "amount": "1000000",
    "from": {
      "chain_uid": "neuron",
      "address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
      "amount": "1000000"
    },
    "msg": "",
    "recipient_address": {
      "user": {
        "chain_uid": "0g",
        "address": "0x5abfe1234567890cdefabc1234567890defabc01",
        "amount": "1000000"
      },
      "limit": {
        "less_than_or_equal": "1000000"
      },
      "preferred_denom": {
        "voucher": {}
      },
      "forwarding_message": {
        "data": "0x"
      }
    },
    "sender": {
      "chain_uid": "neuron",
      "address": "0x887e4aac216674d2c432798f851c1ea5d505b2e1",
      "amount": "1000000"
    },
    "timeout": "60",
    "token": "euclid",
    "tx_id": ""
  }
}

Parameters

Field	Type	Description
msgs	object[]	Array of messages to be signed. Each item includes type and msg.
sender_address	string	Address of the signer.
sender_chain_uid	string	Chain UID of the signer.

MsgItem

Field	Type	Description
type	string	Message type (e.g., transfer_voucher, swap, withdraw_voucher).
msg	object	Message payload containing target and call_data.

MsgPayload

Field	Type	Description
target	string	Contract address to receive the meta transaction.
call_data	string	Encoded call data payload for the meta transaction.