ChainCatcher news, Stacks co-founder Muneeb announced the details of the Stacks Nakamoto upgrade plan on the X platform. The Nakamoto upgrade will begin rolling out between April 15 and 29 (as previously announced).The new PoX consensus contract is called pox-4, which will be activated at specific Bitcoin blocks during this window. Currently, $1.4 billion in STX capital has reached consensus. This funding will automatically unlock (while users continue to earn BTC rewards during this period), and institutional signers and the community will lock the funds in the new pox-4 contract. Signers will begin registering on the network and testing their setups on the mainnet.All launch contracts (including pox-4 and signer binaries) are ready. All core Nakamoto consensus rules have been completed. Block validation, DKG, StackerDB, term extensions, and more have been completed and are being tested.