dumpprivkey JSON-RPC command

dumpprivkey "address"

Reveals the private key corresponding to 'address'.
Then the importprivkey can be used with this output

Arguments

1. "address"   (string, required) The bitcoin address for the private key

Result

"key"                (string) The private key

Examples

> bitcoin-cli dumpprivkey "myaddress"
> bitcoin-cli importprivkey "mykey"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "dumpprivkey", "params": ["myaddress"] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/

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Bitcoin Cash Node Daemon version v22.2.0