Method for achieving multi-block-chain simultaneous casting issuing and multi-chain NFT application

The invention discloses a method for achieving multi-block-chain simultaneous casting issuing and multi-chain NFT application. The method comprises the following steps that 1, multi-chain NFT casting issuing is conducted; step 2, transferring accounts in the NFT chain; step 3, carrying out NFT cross-chain transfer; the first step, the second step, the third step and the fourth step are completed through cooperation of a device which has universality and is used for casting and issuing one NFT application at the same time through multiple block chains, the device comprises a block chain 1, a block chain 2 and a cross-chain message assembly, the block chain 1 is provided with a main NFT casting contract S1, the block chain 2 is provided with a sub NFT casting contract S2, and the cross-chain message assembly is provided with a cross-chain message assembly. And a cross-chain message component S3 is arranged between the block chain 1 and the block chain 2. According to the method, casting, issuing and NFT transfe