[ (json array) { (json object)"height": n, (numeric) height of the chain tip"hash":"hex", (string) block hash of the tip"branchlen": n, (numeric) zero for main chain, otherwise length of branch connecting the tip to the main chain"status":"str" (string) status of the chain,"active" for the main chain Possible values for status:1. "invalid" This branch contains at least one invalid block 2. "headers-only" Not all blocks for this branch are available, but the headers are valid
3. "valid-headers" All blocks are available for this branch, but they were never fully validated
4. "valid-fork" This branch is not part of the active chain, but is fully validated
5. "active" This is the tip of the active main chain, which is certainly valid }, ...]