Here's the abi from one of the mango repositories: [{"constant":true,"inputs":[],"name":"snapshotCount","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[{"name":"ref","type":"string"}],"name":"deleteRef","outputs":[],"type":"function"},{"constant":true,"inputs":[{"name":"index","type":"uint256"}],"name":"getSnapshot","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":true,"inputs":[],"name":"refCount","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[{"name":"ref","type":"string"},{"name":"hash","type":"string"}],"name":"setRef","outputs":[],"type":"function"},{"constant":true,"inputs":[{"name":"index","type":"uint256"}],"name":"refName","outputs":[{"name":"ref","type":"string"}],"type":"function"},{"constant":true,"inputs":[{"name":"ref","type":"string"}],"name":"getRef","outputs":[{"name":"hash","type":"string"}],"type":"function"},{"constant":false,"inputs":[{"name":"hash","type":"string"}],"name":"addSnapshot","outputs":[],"type":"function"},{"inputs":[],"type":"constructor"}]