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14f1674855chainparams: add mainnet assumeutxo param at height 880_000 (Sjors Provoost) Pull request description: #31940 suggests adding a snapshot at every major release. This snapshot should be suitable for v29. I picked the most recent multiple of 10K blocks. You can either download this torrent: ``` magnet:?xt=urn:btih:559bd78170502971e15e97d7572e4c824f033492&dn=utxo-880000.dat&tr=udp%3A%2F%2Ftracker.bitcoin.sprovoost.nl%3A6969 ``` Or generate the snapshot yourself: ```sh bitcoin-cli -rpcclienttimeout=0 -named dumptxoutset utxo-880000.dat rollback=880000 ``` The SHA-256 hash should be: ``` shasum -a 256 utxo-880000.dat 43b3b1ad6e1005ffc0ff49514d0ffcc3e3ce671cc8d02da7fa7bac5405f89de4 ``` And then load it on a fresh node during IBD with: ``` bitcoin-cli -rpcclienttimeout=0 loadtxoutset utxo-880000.dat ``` Note that it's more performant to turn off networking while the snapshot is loading, see #29993: ```sh bitcoin-cli setnetworkactive false ``` Once the snapshot is loaded: ```sh bitcoin-cli setnetworkactive true ``` And enjoy a speedy ride to the tip. ACKs for top commit: achow101: ACK14f1674855fjahr: tACK14f1674855hodlinator: ACK14f1674855rkrux: Concept ACK14f1674855polespinasa: ACK14f1674855Tree-SHA512: e7ed3e8ce3a247614545ecd3254a91814d7f87b3ca1be46df3b9a4c1e6353b46c82ab97d9fc9c5bed8938f28a6a61e6b70baa7c9649fe5da0f2f390b7932f15e